Contact us

We’re a small, independent project and we read every message. The best way to reach us is by email.

What to write about

If a calculator gives a wrong or confusing result, tell us the tool and the numbers you entered so we can fix it fast.

Missing a tool you'd use? Send the idea — a lot of what we build comes straight from requests.

For partnership or advertising enquiries, drop us a line with a few details.

We usually reply within a couple of business days. Corrections to a calculator are our top priority — if something’s wrong, we want to know.

Looking for how we handle your data? See our privacy policy.