Terms of Service
Online Calculator Lab — onlinecalculatorlab.com
Last Updated: July 18, 2026 | Effective: July 18, 2026
1. Acceptance of Terms
By accessing or using the website onlinecalculatorlab.com ("the Site," "we," "us," or "our"), you confirm that you have read, understood, and agree to be bound by these Terms of Service ("Terms") and our Privacy Policy.
If you are using the Site on behalf of an organization, you represent and warrant that you have the authority to bind that organization to these Terms.
These Terms apply to all visitors, users, and others who access or use the Site, regardless of how they reach the Site.
2. Description of Service
Online Calculator Lab provides free online calculators across multiple categories including finance, health, mathematics, geometry, education, business, construction, date and time, automobile, internet and technology, unit conversion, and entertainment.
The calculators are provided at no cost to the user. No account, registration, or payment is required to use any calculator on the Site. All calculator computations are performed locally in the user's browser — no user input data is transmitted to or stored on our servers.
We reserve the right to modify, suspend, or discontinue any calculator or section of the Site at any time without notice.
3. Disclaimer — Informational Use Only
Financial calculators: Results from mortgage, loan, EMI, investment, retirement, and other financial calculators are estimates only. Actual loan terms, interest rates, fees, taxes, and investment returns depend on individual circumstances, lender policies, market conditions, and other factors outside the scope of these calculators. Always consult a qualified financial advisor, accountant, or lender before making financial decisions.
Health calculators: BMI, BMR, body fat, calorie, macro, and other health calculators provide general reference values based on statistical population formulas. They do not account for individual health conditions, medications, medical history, fitness levels, or metabolic variations. Results should not be used to diagnose, treat, or manage any health condition. Always consult a licensed healthcare professional — doctor, dietitian, or certified fitness professional — for personal health guidance.
Construction calculators: Brick, cement, concrete, and tile calculators provide material quantity estimates based on standard formulas and waste factors. Actual quantities required depend on site conditions, local building standards, contractor methods, and on-site variations. These estimates are starting points for planning — not substitutes for professional quantity surveys or engineering assessments.
Legal calculators (if any): No content on this site constitutes legal advice. Consult a qualified attorney for legal matters.
Educational calculators: GPA, CGPA, and grade calculators use common grading scales. Your institution may use different grading systems, credit weighting, or rounding rules. Always verify results against your institution's official grading policy.
4. Accuracy of Information
We make reasonable efforts to ensure that the formulas, calculations, and content on this site are accurate. All formulas are verified before publication. However:
- We do not warrant that all information on the Site is complete, current, or error-free.
- Formulas and standards change over time. A formula that was accurate when published may become outdated.
- Calculator results depend on the accuracy of the inputs you provide. Incorrect inputs produce incorrect outputs.
- Some calculators provide approximations or use simplified models that may differ from specialized professional tools.
If you believe any formula or result on this site is incorrect, please contact us. We take accuracy seriously and investigate all reported errors promptly.
5. Limitation of Liability
To the maximum extent permitted by applicable law, Online Calculator Lab and its operators shall not be liable for any direct, indirect, incidental, special, consequential, or punitive damages arising from:
- Your use of or reliance on any calculator result or content on the Site
- Any financial decisions made based on calculator outputs
- Any health-related decisions made based on calculator outputs
- Any construction, engineering, or other professional decisions made based on calculator outputs
- Errors, inaccuracies, or omissions in any calculator or content
- Interruption, unavailability, or technical failure of the Site
- Any third-party content linked from the Site
This limitation applies even if we have been advised of the possibility of such damages. Some jurisdictions do not allow the exclusion of certain warranties or the limitation of liability for certain types of damages — in such jurisdictions, our liability is limited to the maximum extent permitted by law.
In all cases, our total liability to you for any claim arising from your use of the Site shall not exceed USD $0, since the Site is provided free of charge with no paid relationship between the user and the Site.
6. Permitted and Prohibited Use
You may:
- Use any calculator on the Site for personal, educational, or professional reference purposes
- Share links to calculator pages on the Site
- Quote brief excerpts from Site content with attribution and a link to the source page
- Use calculator results in your own work (with appropriate disclaimers where required)
You may not:
- Scrape, crawl, or systematically download content from the Site in a manner that burdens our servers
- Copy, reproduce, or republish substantial portions of Site content (including calculator HTML, CSS, or JavaScript) without written permission
- Attempt to reverse-engineer, decompile, or extract the source code of any calculator
- Use the Site for any unlawful purpose or in violation of any applicable laws or regulations
- Attempt to interfere with, disrupt, or gain unauthorized access to any part of the Site
- Present calculator results as professional advice in contexts where such advice requires a license
- Frame or embed Site pages in another website without written permission
7. Intellectual Property
All content on this Site — including but not limited to text, HTML, CSS, JavaScript, images, formulas, explanations, and page layouts — is the property of Online Calculator Lab and is protected by applicable copyright and intellectual property laws.
The fco-* CSS system, calculator designs, and page structures are original works. Unauthorized reproduction or distribution of any substantial portion of Site content is prohibited.
The mathematical formulas themselves (e.g., the standard loan amortization formula) are in the public domain and are not claimed as proprietary. What is proprietary is our specific implementation, explanatory content, worked examples, and design.
If you wish to use Site content beyond what is permitted in Section 6, please contact us to request permission.
8. Third-Party Links
Some pages on this Site contain links to third-party websites — such as government agencies (NIST, FCC, US DOL), academic institutions, and reference sources. These links are provided for reference and additional information.
We do not control third-party websites and are not responsible for their content, accuracy, privacy practices, or availability. Linking to a third-party site does not imply our endorsement of that site or its content. You access third-party links at your own risk and subject to the terms and privacy policies of those sites.
9. Site Availability
We aim to keep the Site available at all times, but we do not guarantee uninterrupted access. The Site may be unavailable due to maintenance, hosting issues, or circumstances beyond our control. We are not liable for any inconvenience or loss arising from Site unavailability.
We reserve the right to modify, suspend, or discontinue any part of the Site — including any calculator or category — at any time without prior notice.
10. Governing Law
These Terms of Service are governed by and construed in accordance with applicable laws. Any disputes arising from these Terms or your use of the Site shall be resolved in the appropriate courts of the jurisdiction where the Site is operated.
If any provision of these Terms is found to be unenforceable, the remaining provisions shall continue in full force and effect.
11. Changes to These Terms
We may update these Terms of Service at any time. Changes take effect when posted on this page, with the "Last Updated" date revised accordingly. Material changes will be highlighted on this page.
Your continued use of the Site after changes are posted constitutes your acceptance of the updated Terms. If you do not agree with any changes, you should stop using the Site.
We recommend reviewing these Terms periodically if you are a regular user of the Site.
12. Contact
Questions about these Terms of Service? Contact us:
- Website: onlinecalculatorlab.com/contact/
- Response time: We respond to Terms-related inquiries within 5 business days.