Last updated: August 2026

By using keycalculators.com, you’re agreeing to the terms below. If you don’t agree with any part of them, the simplest option is to not use the site.

What this site is for

The calculators here are provided for general informational and educational purposes. They’re free to use, and nothing on this site requires payment or an account. Results are estimates based on the information you enter and the formula or data behind each calculator — they’re not a substitute for advice from a qualified professional, and shouldn’t be the sole basis for a significant financial, medical, legal, or tax decision.

Accuracy

Each calculator is built on a real formula or cross-checked cost data, and I make a genuine effort to keep results accurate and current. That said, I can’t guarantee every result will be error-free or exactly right for every individual situation — rounding, assumptions, and the specifics of your circumstances can all affect the real-world number. Where a calculator’s result is an estimate rather than a fixed calculation, the page says so directly.

Limitation of liability

This site and its calculators are provided as-is, without warranties of any kind. To the extent the law allows, I’m not liable for losses or damages arising from your use of this site or reliance on a calculator’s results — including financial loss, lost data, or any other indirect or consequential loss. This doesn’t affect any liability that can’t legally be limited, such as liability for fraud.

Intellectual property

The text, calculators, design, and code on this site belong to Key Calculators unless stated otherwise. You’re welcome to use the site and its tools for your own personal, non-commercial purposes. Copying, republishing, or commercially exploiting the site’s content or calculators without permission isn’t allowed.

Advertising

This site may display advertisements through Google AdSense and similar networks. These third parties may use cookies to serve and measure ads — details are in the Privacy Policy. Ads on this site aren’t endorsements, and I don’t control what individual advertisers show.

Third-party links

Where this site links to an external website, that site operates independently, and I’m not responsible for its content, accuracy, or privacy practices. A link isn’t an endorsement.

Changes to these terms

These terms may be updated as the site grows — new calculators, new features, or legal requirements can all mean a revision. The date at the top of this page reflects the most recent update. Continuing to use the site after a change means you accept the updated terms.

Questions

Reach out through the contact page or email info@keycalculators.com with anything unclear.