Calxie — Calculator Rental Terms

Effective April 27th, 2026 

By completing a rental with Calxie, you acknowledge that you have read, understood, and agree to be bound by these Rental Terms in their entirety. 

Section 1: Introduction and Overview 

Welcome to Calxie. Calxie is a calculator rental service based in Boulder, Colorado, founded with the mission of making high-quality calculators accessible and affordable to students, faculty, and professionals. We understand that graphing calculators, scientific calculators, and other specialized computing tools can be a significant financial burden, particularly for students who may only need a specific model for a single course or exam. Calxie exists to bridge that gap by offering flexible, affordable rental options that put the right calculator in your hands exactly when you need it, without the commitment or expense of purchasing one outright. 

Our rental program is designed with simplicity and convenience in mind. Whether you are a first-year student preparing for introductory calculus, an engineering major tackling advanced coursework, a graduate student conducting research that requires specific computational tools, or a working professional studying for a certification exam, Calxie offers rental periods and calculator models tailored to your needs. We carry a wide range of calculator models from leading manufacturers, and each unit in our inventory is carefully inspected, tested, and verified to be in full working condition before it reaches you. Our goal is to ensure that you can focus on your studies and your work, confident that your calculator will perform reliably throughout your rental period. 

By renting a calculator from Calxie, you agree to be bound by this Calculator Rental Rental Terms t. The Rental Terms constitute a binding agreement between you and Calxie and govern the entire rental relationship, from the moment you place your order through the return of the calculator and the resolution of any outstanding obligations. It is important that you read this document carefully before completing your rental, as it outlines your rights, your responsibilities, our fee structure , and the procedures for returns, disputes, and other important matters. 

Section 2: Definitions 

The following terms are used in this Rental Agreement:

"Renter" or "You" refers to the individual who enters into the Rental Terms.  If you are a minor whose rental agreement has been co-signed by a parent or legal guardian, the term “Renter” refers to both the minor and the co-signing adult.

“Rental Terms” refers to this agreement.

"Calxie" or "We" refers to Calxie.com

"Calculator" refers to the calculator(s) that are the subject of the rental agreement. 

“Dispute Window” refers to the seven business days after a Renter is notified of Chargeable Damages. 

"Rental Period" refers to the agreed-upon duration of the rental, beginning on the date the calculator is picked up in person or delivered to the Renter and ending on the scheduled return date. 

"Return Date" or "Scheduled Return Date" is the last calendar day of the Rental Period, as specified on the rental confirmation provided to the Renter at the time of checkout. 

"Full Retail Buy Price" means the current retail purchase price of the specific calculator model rented, as listed on calxie.com at the time a late fee, damage fee, or replacement fee is assessed. Because calculator prices may fluctuate over time, the Full Retail Buy Price used for fee calculations will always reflect the price listed at the time of assessment, not the price at the time the rental was initiated. 

"Normal Wear and Tear" refers to minor cosmetic changes that occur through ordinary, careful use of the calculator during the Rental Period, as described in greater detail in Section 5 of this document.   Normal Wear and Tear includes minor cosmetic scuffs on the exterior casing, light surface scratching on the body or battery cover, and slight fading or smoothing of button labels from regular use. 

“Chargeable Damage” refers to damages to a calculator for which a Renter is responsible for compensating Calxie.

"Payment Method on File" refers to the credit card, debit card, or other accepted payment method that the Renter provides at the time of checkout and may be used to process any applicable fees as described in these terms. 

"Business Days" refers to Monday through Friday, excluding holidays observed in the State of Colorado. 

Section 3: Rental Eligibility 

To rent a calculator from Calxie, you or a co-signer must be at least eighteen years of age at the time the rental agreement is executed. By co-signing, the parent or legal guardian assumes joint and several financial responsibility for the rental, including responsibility for any late fees, damage fees, replacement fees, or other charges that may arise under these terms. Calxie requires this co-signature to ensure that there is a legally responsible adult associated with every rental agreement, which protects both the Renter and Calxie. 

You must provide a valid email address and a valid phone number at which you can be reliably reached throughout the duration of your rental. Calxie uses these contact methods to send rental confirmations, return reminders, extension notifications, fee assessments, and other important communications related to your rental. It is your responsibility to ensure that the contact information you provide is accurate and up to date, and to promptly notify Calxie if your email address or phone number changes during your rental period. Failure to receive communications from Calxie due to outdated or incorrect contact information does not relieve you of your obligations under these terms. 

You must provide a valid payment methodat the time of checkout, and that payment method must remain active and valid for the entire duration of your rental period and for a reasonable period following the return of the calculator to allow for the processing of any applicable fees. Calxie accepts major credit cards, debit cards, and other payment methods as listed on calxie.com. Calxie reserves the right to decline a rental application at its discretion, including but not limited to situations where the prospective Renter has an outstanding unpaid balance from a previous Calxie rental, where a previous rental was not returned, where the identification provided cannot be verified, or where the payment method provided is declined or cannot be validated. Calxie also reserves the right to verify any information provided by the Renter as part of the eligibility determination process. 

Section 4: Rental Period and Extensions 

The Rental Period for each calculator is determined at the time of checkout and will be clearly stated on the rental confirmation sent to the Renter's email address. Calxie offers several standard Rental Periods to accommodate different needs. It is the Renter's responsibility to note the Scheduled Return Date and to plan accordingly to ensure the calculator is returned on time. 

It is worth noting that the Rental Period is a fixed contractual commitment. Unlike a subscription that can be canceled at any time, the rental fee covers the agreed-upon period in full, and no partial refunds will be issued if a calculator is returned before the end of the Rental Period. Renters who are unsure how long they will need a calculator are encouraged to start with a shorter Rental Period and extend if needed, rather than committing to a longer Rental Period and returning early. 

Section 5: Condition Requirements 

Every calculator rented through Calxie is thoroughly inspected, tested, and verified to be in full working conditionbefore it is providedto the Renter. The inspection process includes verifying that all buttons and keys are functional and responsive, that the screen displays clearly and without defects, that the calculator powers on and off correctly, that all standard functions and modes operate as expected for that model, and that the exterior casing is clean and free of significant cosmetic damage. Each unit is provided with fresh or fully charged batteries so that the Renter can begin using the calculator immediately upon receipt. If the calculator model uses rechargeable batteries, the unit will be provided with a full charge and, where applicable, the charging cable or accessories specified on the rental listing will be provided. 

Renters are expected to return calculators in the same functional condition as received, accounting for Normal Wear and Tear.  Normal Wear and Tear will not result in any Chargeable Damages to the Renter. Calxie understands that calculators are tools meant to be used, and we do not expect a rented calculator to be returned in pristine, brand-new condition. 

Chargeable damages, that do not qualify as Normal Wear and Tear, include but are not limited to: 

Cracked, shattered, or visibly damaged screens, whether the screen is completely non-functional or simply displays visible cracks, chips, or pressure marks;

Missing, broken, loose, or non-functional buttons or keys; 

Damage caused by liquids including, but not limited to, water stains on the screen or casing, or corrosion on battery, contacts or internal components;

Warped or swollen components that suggest exposure to moisture or extreme heat; 

Deep gouges, cracks, chips, or breaks in the exterior casing that go beyond light surface scratching;

Unauthorized modification, tampering, or alteration to the calculator's hardware, firmware, or software;

Soldering or desoldering components;

Burn marks, melting, warping, or heat damage of any kind;

Stickers, adhesive residue, decals, or decorative additions; and/or

Permanent marker, paint, ink, engraving, or any other deliberate marking on the calculator body, screen, or keys. 

Upon return, every calculator undergoes a detailed inspection by Calxie. Calxie reserves the right to make the final determination on whether there are Chargeable Damages. If there is any question or ambiguity regarding the condition of a returned unit, Calxie will document the Chargeable Damages with clear photographs and will communicate its findings and any associated charges to the Renter in writing within the timeframe specified in Section 7. 

Section 6: Liability and Renter Responsibilities 

The Renter assumes full responsibility and liabilityfor the calculator from the moment it is received until the moment it is returned to and accepted by Calxie. This means that any damage, loss, theft, or destruction that occurs during the Rental Period, regardless of the circumstances, is the Renter's responsibility. 

Calxie is not responsiblefor the loss of any data, programs, notes, equations, custom settings, or files stored on the calculator at any time during or after the Rental Period. Many modern graphing calculators allow users to store programs, notes, and data, and Renters should be aware that all such content may be erased when the calculator is returned to Calxie and prepared for the next Renter. Calxie strongly recommends that Renters back up any important programs, notes, or data before returning the calculator. 

Renters must not lend, sublease, rent out, give away, or otherwise transfer possession of the calculator to any third party without prior written consent from Calxie. The rental agreement is between Calxie and Renter, and only that individual is authorized to possess and use the calculator(s). Any unauthorized transfer of possession does not relieve the Renter of their obligation under these Rental Terms. If Calxie becomes aware that a calculator has been transferred to a third party without authorization, Calxie reserves the right to demand the immediate return of the calculator and to charge any applicable fees to the Renter. 

Renters must not attempt to repair, disassemble, open, modify, alter, or tamper with the calculator in any way. If a calculator malfunctions during the Rental Period through no fault of the Renter, such as a manufacturing defect or a component failure resulting from normal use, the Renter should contact Calxie immediately. Calxie will arrange for a replacement calculator to be provided at no additional charge, subject to availability. Under no circumstances should the Renter attempt to fix the problem themselves, as any unauthorized repair will void the Renter's protection against malfunction charges and may result in additional damage fees. 

The Renter is also responsible for using the calculator in accordance with the manufacturer's guidelines and for exercising reasonable care in its storage and handling. This includes keeping the calculator away from extreme temperatures, both hot and cold, as prolonged exposure to heat or freezing conditions can damage the screen, batteries, and internal components. The calculator should be kept away from water, other liquids, and excessively humid environments. The Renter should avoid dropping the calculator, placing heavy objects on it, or subjecting it to impacts or vibrations that could cause internal or external damage. 

Section 7: Replacement and Damage Fees 

If a calculator is lost, stolen, or damaged beyond repair during the Rental Period, the Renter will be charged the Full Retail Buy Priceof the specific calculator model that was rented. The Full Retail Buy Price is determined by the current retail price of the calculator model as listed on calxie.com at the time the charge is assessed. This price represents the cost to Calxie of replacing the calculator in its inventory so that another Renter can be served. In the event that the specific calculator model has been discontinued and is no longer listed on calxie.com, Calxie will use the most recent listed price or the manufacturer's suggested retail price for the closest equivalent current model, whichever is applicable. 

If a calculator is returned with Chargeable Damages, Calxie will assess the nature and extent of the damage and determine whether a repair feeor a full replacement feeis appropriate. Repair fees are assessed at Calxie's discretion based on the specific damage observed and the cost of restoring the calculator to full working condition. In all cases, repair fees will never exceed the Full Retail Buy Price of the calculator model. If the damage is so severe that repair is not feasible or cost-effective, the full replacement fee, equal to the Full Retail Buy Price, will be charged instead. 

Calxie will notify the Renter of any Chargeable Damages within five business daysof receiving a returned calculator. The notification will be sent to the email address on file and will include a description of the damage observed, photographs of the damage where applicable, and the amount of the assessed fee. The Renter has seven business daysfrom the date of notification to dispute the damage assessment by contacting Calxie in writing at the email address listed in Section 14. The dispute must include a clear explanation of why the Renter believes the assessment is incorrect, and may include any supporting evidence the Renter wishes to provide, such as photographs of the calculator taken before it was returned or documentation of the calculator's condition at the time of pickup. 

If no dispute is filed within the Dispute Window, the Renter agrees to accept the Chargeable Damages and permits Calxie to charge the amount of the Chargeable Damages to the Payment Method on File. If a dispute is filed within the Dispute Window, Calxie will review the dispute in good faith and may request additional information or clarification from the Renter. Calxie will communicate the outcome of the dispute to the Renter in writing within ten business days of receiving the dispute. Calxie's determination following a dispute review is final. Renters are encouraged to inspect their calculator upon receipt and to document its condition with photographs at the beginning of the Rental Period, as this documentation can be valuable in the event of a dispute upon return. 

It is important to understand that Chargeable Damages and/or replacement fees are separate from, and in addition to, any late fees that may apply under Section 8. For example, if a calculator is returned thirty-five days late and also has a cracked screen, the Renter may be charged both the applicable late fee for the thirty-five day delay and Chargeable Damages for the cracked screen. However, in no case will the total of all fees charged to a Renter for a single rental exceed the Full Retail Buy Price of the calculator, because once the full price has been paid, ownership of the calculator effectively transfers to the Renter. 

Section 8: Late Return Fee Structure 

Calxie's rental program depends on the timely return of calculators so that the calculator can be provided to other students, faculty, and professionals. Every calculator in Calxie's inventory is carefully maintained and scheduled to serve multiple Renters throughout the academic year. When a calculator is returned late, it disrupts Calxie's inventory planning and may prevent the next Renter from receiving their calculator on time, which can have real consequences for that person's coursework, exams, or professional responsibilities. For this reason, Calxie enforces a structured late fee policy that is designed to encourage timely returns while remaining fair and proportionate. The fee structure is tiered, meaning that the financial consequence increases with the length of the delay, giving Renters an incentive to return their calculators as promptly as possible even if the Scheduled Return Date has passed. 

A rental is considered "late" beginning on the calendar day immediately following the Scheduled Return Date. However, Calxie recognizes that minor delays can happen for a variety of legitimate reasons, including shipping transit time for mail-in returns, brief scheduling conflicts, illness, travel, or simple forgetfulness. To accommodate these situations, Calxie provides a nine-calendar-day grace periodfollowing the Scheduled Return Date. If a calculator is returned to Calxie, whether in person or postmarked for mail-in return, within nine calendar days after the Scheduled Return Date, no late fee will be charged. The grace period is Calxie's way of building flexibility into the return process and demonstrating good faith toward its Renters. However, Renters should not treat the grace period as an extension of the Rental Period. The Scheduled Return Date remains the date by which the calculator should be returned, and the grace period exists solely as a buffer for unforeseen circumstances.  After the grace period the following late fee schedules applies:

Tier 1: 10 - 30 calendar days.  If a calculator is returned between ten and thirty calendar daysafter the Scheduled Return Date, the Renter agrees to pay a late fee equal to ten percent (10%) of the calculator's Full Retail Buy Price. For example, if the Full Retail Buy Price of the rented calculator is two hundred dollars, the late fee for this tier would be twenty dollars. The Renter acknowledges and agrees that the Tier 1 late fee reflects a reasonable estimate of the administrative costs associated with tracking overdue rentals, and the opportunity cost to Calxie of not having the calculator available for other Renters. 

Tier 2: 31 - 45 calendar days. If a calculator is returned between thirty-one and forty-five calendar daysafter the Scheduled Return Date, the Renter agrees to pay a late fee equal to fifty percent (50%) of the calculator's Full Retail Buy Price. Using the same two-hundred-dollar example, this would result in a late fee of one hundred dollars. The Renter acknowledges and agrees that the Tier 2 late fee reflects a reasonable estimate of the impact that an extended late return has on Calxie's ability to serve other Renters.

Tier 3: 46+ calendar days.  If a calculator has not been returned by the forty-sixth calendar dayafter the Scheduled Return Date, the Renter agrees to pay a late fee equal to one hundred percent (100%) of the calculator’s Full Retail Buy Price.  At this point, the calculator is considered unreturned, and upon payment of the Full Retail Buy Price, ownership of the calculator transfers to the Renter. The Renter is no longer required or expected to return the unit, as the transaction has effectively been converted from a rental into a purchase. Using the same two-hundred-dollar example, this would result in a charge of two hundred dollars. 

By agreeing to these Rental Terms, the Renter authorizes Calxie to charge late fees or Chargeable Damages to the Payment Method on File without obtaining additional authorization at the time each fee is assessed. This pre-

authorization is a condition of the rental agreement and is necessary for Calxie to administer its late fee policy efficiently and consistently.  Note that while late fees are assessed independently of and in addition to Chargeable Damages, the combination of late fees and Chargeable Damages will not exceed the Full Retail Buy Price.  Furthermore, Renter acknowledges and agrees that any rental fees paid will not be setoff against late fees and/or Chargeable Damages. . 

Section 9: Returns and Shipping 

For Renters who are not local to the Boulder area or who prefer the convenience of returning by mail, Calxie offers a mail-in return option. Upon request, Calxie will provide a prepaid return shipping label at no additional cost to the Renter. To be considered an on-time return, the return shipment must be postmarked on or before the Scheduled Return Date. Calxie will use the postmark date, not the delivery date, to determine whether a mail-in return is on time. Renters are encouraged to obtain a receipt or tracking number from the shipping carrier as proof of the postmark date. 

When shipping a calculator back to Calxie, the Renter is responsible for ensuring that the calculator is packaged in protective packagingsufficient to prevent damage during transit. Calxie recommends using the original packaging materials if they are still available. If the original packaging is not available, the calculator should be placed in a padded envelope or a small box with adequate cushioning material such as bubble wrap, foam padding, or crumpled packing paper surrounding the calculator on all sides. The goal is to prevent the calculator from shifting, rattling, or being subjected to impact during the shipping process.  Calxie is not responsible for damage that occurs to the calculator during return shipping as a result of improper, insufficient, or negligent packaging by the Renter. If a calculator arrives at Calxie with damage that is attributable to inadequate packaging, the Renter may incur Chargeable Damages as described in Section 7. For this reason, Calxie strongly recommends taking care with packaging and, if possible, photographing the calculator and the packaged shipment before sealing and sending it, as this documentation may be useful in the event of a dispute. Calxie will confirm receipt of all returned calculators by sending an email notification to the Renter within two business days of receiving the returned unit. 

Section 10: Payment and Billing 

All rental fees are due and payable in full at the time of checkout. Payment must be made using a valid credit card, debit card, or other accepted payment method as listed on calxie.com. The rental fee covers the entire agreed-upon Rental Period, and as noted in Section 4, no partial refunds will be issued for early returns. The payment method provided at checkout will be securely stored as the Payment Method on Filefor the duration of the rental and for a reasonable period following the return of the calculator. This Payment Method on File may be used to process any applicable late fees, damage fees, replacement fees, or other charges as described in these terms, without the need for additional authorization from the Renter at the time each charge is assessed. 

If the Payment Method on File is declined when Calxie attempts to process a charge, Calxie will notify the Renter by email and, if necessary, by phone, and will provide ten business days for the Renter to provide an updated payment method or to otherwise resolve the payment issue. During this ten business-day resolution period, Calxie will make reasonable efforts to contact the Renter and work toward a resolution. If the payment issue is not resolved within ten business days, the outstanding balance may be referred to a third-party collections agency for further action. If an account is referred to collections, the Renter may be responsible for any additional collection costs, legal fees, or other expenses incurred in the process of recovering the outstanding balance, to the extent permitted by applicable law. 

All prices, fees, and charges assessed by Calxie are denominated in United States dollars. Receipts for all charges, including the initial rental fee, any late fees, damage fees, and replacement fees, will be sent to the Renter's email address on file at the time the charge is processed. Renters are encouraged to review all receipts promptly and to contact Calxie within the applicable dispute window if they believe any charge is incorrect. Calxie does not charge sales tax on rental transactions unless required to do so by applicable state or local tax law, in which case any applicable tax will be added to the rental fee and clearly disclosed at the time of checkout. 

Section 11: Dispute Resolution and Governing Law 

Calxie is committed to resolving any disputes, concerns, or disagreements fairly, efficiently, and in good faith. If a Renter has a concern regarding any aspect of the rental experience, you agree to contact Calxie customer servicedirectly by email at [support@calxie.com] or by phone during regular business hours. Calxie's customer service team will review the concern and make a good-faith effort to resolve the issue informally and to the Renter's satisfaction. Many issues, including questions about fee 

calculations, condition assessments, and return processing, can be resolved quickly through direct communication. 

The  Rental Terms, and any disputes arising from or relating to the Rental Terms, shall be governed by and construed in accordance with the laws of the State of Colorado, without regard to its conflict-of-law principles. The Parties agree that all disputes must be filed in the federal court with jurisdiction over Boulder Colorado, and/or state courts located in Boulder, Colorado.  Renter expressly waives their right to initiate or participate in a class action.

If any provision of these Rental Terms is found by a court to be invalid, illegal, or unenforceable for any reason, the invalidity of that provision shall not affect the validity or enforceability of the remaining provisions of the Rental Terms, which shall continue in full force and effect. The invalid or unenforceable provision shall be modified to the minimum extent necessary to make it valid and enforceable while preserving the original intent of the provision to the greatest extent possible. 

Section 12: Limitation of Liability 

To the fullest extent permitted by applicable law, Renter agrees that Calxie's total aggregate liability for any and all claims, losses, damages, or expenses arising from or related to the Rental Terms, the rental of a calculator, or the use or inability to use a rented calculator, shall not exceed the total rental fees paidby the Renter to Calxie for the specific rental in question. This limitation of liability applies regardless of the legal theory upon which the claim is based, whether in contract, tort, negligence, strict liability, warranty, or otherwise. 

In no event shall Calxie be liable for any indirect, incidental, special, consequential, or punitive damagesof any kind, including but not limited to lost grades, missed exams, failed courses, lost academic opportunities, lost data, lost programs, emotional distress, or any other academic, professional, or personal consequences resulting from calculator malfunction, calculator unavailability, delayed delivery, incorrect calculator model, or any other issue related to the rental. Calxie provides calculators as a convenience and a tool, and while we make every effort to ensure that each calculator is in full working order when delivered, the Renter acknowledges that electronic devices can occasionally malfunction and that Calxie cannot guarantee uninterrupted or error-free performance. 

Calxie makes no warranties or representations beyond those expressly stated in these Rental Terms. To the extent permitted by applicable law, CALXIE EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. THE RENTER ACKNOWLEDGES THAT THE CALCULATOR IS RENTED ON AN "AS-IS" BASIS AS OF THE TIME OF DELIVERY, subject only to Calxie's express commitment that the calculator has been inspected and verified to be in full working condition prior to shipment or handoff as described in Section 5. 

Section 13: Modifications to These Terms 

Calxie reserves the right to modify, update, revise, or amend these Rental Terms at any time and for any reason, at its sole discretion. When changes are made, the most current version of these terms will be published on calxie.com, and the "Effective Date" shown at the top of the document will be updated to reflect the date of the most recent revision. Calxie may, but is not required to, notify existing Renters of changes to these terms by email. Renters are encouraged to review these terms periodically by visiting calxie.com to ensure they are aware of any updates. 

For active rentals, any changes to these Rental Terms will not apply retroactively. The version of these terms that was in effect at the time the Renter completed the rental checkout and agreed to the terms will govern that specific rental for its entire duration, including any extensions. If a renter enters into a new rental agreement after updated terms have been published, the new terms will apply to that new rental. This approach ensures that Renters can rely on the terms they agreed to at the time of checkout and are not subject to unexpected changes mid-rental. 

Calxie's decision not to enforce any particular provision of these terms in a given situation does not constitute a waiver of that provision or of Calxie's right to enforce it in the future. All provisions of these terms remain in effect unless expressly modified or waived in writing by an authorized representative of Calxie. No oral statements, representations, or agreements made by any Calxie employee, agent, or representative shall modify or supersede the written terms contained in this document unless confirmed in writing by Calxie. 

Section 14: Contact Information 

Calxie is located at 1479 Periwinkle Drive, Boulder, Colorado 80304. Renters and prospective Renters may reach Calxie by email at [support@calxie.com]. 

Additional information about Calxie, including current rental pricing, available calculator models, inventory availability, frequently asked questions, and the most up-to-date version of these Rental Terms, can be found at calxie.com. Calxie welcomes questions, feedback, and suggestions from Renters and prospective Renters at any time. Whether you have a question about a specific policy, need help choosing the right calculator for your course, or simply want to learn more about how the rental process works, the Calxie team is here to help and looks forward to hearing from you.