Contact us

We welcome suggestions, corrections and requests for new calculators. If a result looks off, or there is a tool you wish we had, telling us is the fastest way to get it fixed or built.

Email us at hello@calculatorden.com and we will get back to you. To help us route your message quickly, it is useful to say which of these it is about:

• Correction - a result or explanation that looks wrong. Please include the calculator name and the numbers you entered.
• Calculator request - a tool you would like us to build.
• Technical issue - something not working on the site or on a particular device or browser.
• Partnership - working together or featuring our tools.
• Embedding - help adding one of our calculators to your own website.
• Advertising - advertising or sponsorship enquiries.
• General enquiry - anything else.

When reporting a problem with a calculator, a quick note of which calculator and the numbers you entered helps us reproduce and fix it far faster.