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Questions, a bug report, or a calculator you'd like to see - send us a message and we'll get back to you.

Typical response time: we read every message - most replies go out within a few business days.

What to include

Bug? Which calculator, what you entered, what went wrong.
Suggestion? What it should calculate, who'd use it.
Unclear? Which page, which question.

Every calculator is free

No account, no subscription, no hidden limits - and nothing you type into a calculator ever reaches us. See our Privacy Policy.

Frequently asked questions

Are the calculators really free?

Yes - every calculator on the site is completely free, with no account, subscription, or hidden limits. The site is supported by advertising (Google AdSense), which is what lets us keep every tool free to use.

Do you store what I enter into a calculator?

No - calculations run directly in your browser. See our Privacy Policy for full details.

Is this contact form itself private?

Yes - it simply opens your own email app with your message pre-filled. Nothing you type here is sent to us until you actually send that email yourself, and no third-party service ever sees it.

Can I get personal financial, medical, or legal advice here?

No - our calculators provide general estimates using standard formulas, not personalized advice. For decisions specific to your situation, please consult a qualified professional.

You can also browse all calculators or read more about us.