Contact

One address, read by a human.

hello@calcpit.com

Reporting an error

This is the message we most want to receive. If a result looks wrong, please include the calculator, the values you entered, the answer you expected and where your figure comes from. Every page prints the formula it uses, which usually makes the disagreement easy to locate.

We correct confirmed errors quickly and note the change on the page.

Suggesting a calculator

Tell us what you were trying to work out and what you had to do instead. Useful suggestions come from real jobs.

Commercial use

You are free to use these calculators in your own estimating work. If you want to embed one on your own site, or want a version branded for your business, get in touch.