About CalcBloom

CalcBloom is a small collection of free, fast and privacy-friendly calculators for the everyday maths that actually comes up — working out a percentage, converting units, counting the days to a deadline, checking a BMI or sizing up a loan. Each calculator gives a clear answer on a single screen, with no sign-up and no clutter.

Privacy first

Every calculation runs right in your browser. The numbers you type are processed on your own device and are never uploaded, stored or tracked. You can read the details in our Privacy Policy.

Fast and free

There is nothing to install and nothing to pay. CalcBloom is built as plain, lightweight web pages, so it loads quickly and works on phones, tablets and desktops — and most calculators keep working even if your connection drops while the tab is open.

Part of inblooms

CalcBloom is one of the small web tools made at inblooms — useful, fast, privacy-respecting things built one idea at a time. Have feedback or a calculator you'd like to see? We would love to hear it on our Contact page.