Home › Contact
Contact Us
Found a wrong result, have a question or want a new calculator? Send us a message. We read every one.
How can we help?
Choose the reason that fits best when you write to us.
Report a wrong result
Tell us the numbers you entered and the result you expected.
Suggest a calculator
Tell us which tool you would like to see on the Site.
Ask a question
Ask us how a calculator works or what a result means.
Business or privacy
Partnership, advertising or privacy-related requests.
Send us a message
Fill in the form and we will get back to you by email.
Before you write
I think a calculator gave a wrong answer. What should I send?
Please tell us the calculator name, the exact numbers you entered and the result you expected, plus the device and browser you used. That lets us reproduce the problem quickly.
Can you give me financial, tax or medical advice?
No. Our calculators give estimates for information and planning, and we cannot give personal advice. Please speak to a qualified professional. See our Disclaimer.
Can you suggest which calculator I should use?
Yes. Browse our Finance, Health, Math and Date & Time categories, or write to us and describe what you want to work out.
Do you store the numbers I enter into the calculators?
No. Calculator inputs stay in your browser and are not sent to us. You can read more in our Privacy Policy.
Looking for a calculator?
Browse all of our free tools.
Browse calculators