About HatchCalc

HatchCalc is a growing collection of free online tools — calculators, converters, and generators designed to answer everyday questions quickly, with no sign-up and no installs.

Every tool runs entirely in your browser. The numbers and text you enter are never sent to our servers, stored, or shared. Close the tab and your data is gone.

The site is funded by unobtrusive advertising, which lets us keep every tool free for everyone. We aim to keep pages fast, accurate, and honest: each tool explains the formula or method it uses so you can verify the results yourself.

Found a bug, or is there a tool you wish existed? We genuinely want to hear about it — see the contact page for how to reach us.