Contact CalcBoxes

Questions, bug reports, or a calculator you’d love us to build? Send us a message — we read every one.

Email us

The quickest way to reach us is by email at [email protected]. We aim to reply within a few working days.

Send a message

You can also use the form below. It opens your email app with the details ready to send.

So we can reply to you.

What to include

If you’re reporting a problem, telling us which tool you were using and what device or browser you’re on helps us fix it faster. If you’re suggesting a new calculator, a quick note on what you’d use it for is perfect.