Contact CalculatorBin

We read every message. The fastest way to reach us is by email:

Reporting a problem with a calculator

Please include:

The calculator’s page address (use “Copy link to these inputs” on the page — it includes your numbers)
What result you expected and why
Your device and browser, if something didn’t display correctly

Tell us the calculation you do by hand or in a spreadsheet, and what you wish an online tool did better. Many of our calculators started this way.

We usually reply within a few business days.