Contact
Email is the fastest way to reach us, and every message is read by a person.
Reporting an error
This is the message we most want to receive. To let us check it quickly, include:
- Which calculator, and a link to the page
- The exact values you entered
- The result you got and the result you expected
- The source for the expected figure, if you have one
Confirmed errors are fixed and deployed the same week wherever possible.
Requesting a calculator
Tell us what you need to work out and what inputs you would expect to enter. Requests that come up repeatedly get built first, so it is worth asking even if you assume someone else already has.
Everything else
Press enquiries, partnership questions, and general feedback all go to the same address. We do not accept guest posts or paid link placements, so please skip those.
Before writing, the about page covers how the calculators are built, and the privacy policy covers what happens to your data.