About WorldCalcs

WorldCalcs is a growing collection of free online calculators and converters for everyday life — covering dates and time, unit conversion, finance, health, math and other everyday tasks. Every tool is built to be fast, mobile-first and privacy-friendly, with calculations running right in your browser.

Accuracy you can trust

Each calculator is based on an established, authoritative formula, and we test every tool against independent calculations before it goes live. Learn more on our Methodology page.

Privacy first

No sign-up is required and we don't sell your data. Optional analytics only run with your consent.

Found a problem?

We want every answer to be correct. If something looks off, please reach out through our Contact page and we'll review it.