Terms of Use

Last updated: 2026-09-18

By using calculator-free.com you accept the terms below. If you do not accept them, please do not use the site.

What this site is

calculator-free.com provides free calculators for general information and education. It is free to use, requires no account, and is funded by advertising.

No professional advice

Results are estimates produced by published, general-purpose formulas. They are not financial, tax, legal, medical or nutritional advice, and they cannot account for your individual circumstances.

• The finance calculators ignore fees, insurance, local taxes and rate changes, and the pay calculator models United States federal income tax, Social Security and Medicare only — no state or local tax, and nothing outside the US.
• The health calculators (BMI, body fat, calories, ovulation, pregnancy, sleep) use population-level formulas that do not diagnose anything. Speak to a qualified clinician before acting on any of them, and never use them to make a decision about medication, treatment or pregnancy.
• The betting calculators work out the arithmetic of a stake. They are not advice to gamble, do not predict outcomes, and are intended only for adults in jurisdictions where betting is legal.

Verify anything important independently before you rely on it.

Accuracy and availability

We work to keep the formulas correct and fix errors when we find them, but we give no warranty that the site is accurate, complete, uninterrupted or fit for a particular purpose. To the fullest extent permitted by law we are not liable for any loss arising from your use of the site or reliance on its results.

Acceptable use

You may use the calculators freely, including at work. You may not scrape the site at a volume that degrades it for others, present it as your own, or interfere with the advertising that pays for it.

Intellectual property

The text, design and code of this site belong to calculator-free.com. The underlying mathematical formulas are public knowledge and belong to no one.

Third-party links and ads

Advertising and outbound links lead to sites we do not control and are not responsible for.

Changes

These terms may change; the date above shows when they last did. Questions: contact us.