Terms of Use
Acceptance of terms
By using calc.one, you agree to these terms. If you don't agree, please don't use the site. We may update these terms occasionally; continued use after changes means you accept the new version.
What we provide
calc.one is a free, advertising-supported collection of online calculators. The calculators are general-purpose tools intended for casual reference, education, and rough estimation.
No warranty — important
The calculators on this site are provided "as is", without warranty of any kind. We make every effort to verify the math, but you should not rely on calc.one calculators for:
- Medical decisions — health calculators are screening tools, not diagnoses. Always consult a healthcare professional for medical guidance.
- Legal, tax, or regulatory filings — for official filings, consult a qualified professional or use the tools provided by the relevant authority.
- Financial decisions involving large sums — for mortgage, investment, or retirement decisions, verify the math with your lender, financial advisor, or accountant before acting.
We are not liable for losses or damages arising from the use of any calculator, content, or advertisement on this site.
Acceptable use
You may use calc.one freely for personal and commercial purposes. You may not:
- Scrape or systematically copy calculators or content (use the contact page if you want to license something)
- Reverse-engineer, frame, or rehost the site to misrepresent its origin
- Run automated traffic that places undue load on the servers
- Attempt to bypass advertising in ways that violate applicable laws
Intellectual property
The calculator implementations, content, design, and code on calc.one are our intellectual property. The underlying mathematical formulas are, of course, in the public domain. You're welcome to learn from a calculator and build your own; please don't copy our prose or code wholesale.
Third-party links and ads
Pages may contain links to third-party sites and advertisements served by third-party networks. We don't control those destinations and are not responsible for their content, terms, or privacy practices. Click through at your own discretion.
Changes to the service
We add, remove, and update calculators continuously. Specific calculators may be discontinued, redirected, or revised at any time. We don't promise that any particular calculator will remain available indefinitely.
Governing law
These terms are governed by the laws of the United States. Any disputes will be resolved in the courts of the operator's home jurisdiction.
Contact
Questions about these terms? Contact us.