About

metacalculator.org is a collection of free online calculators covering finance, health, math and everyday tasks. Every calculator runs entirely in your browser: your numbers are never uploaded, stored or shared.

Why we built it

We believe useful tools should be fast, free and private. No accounts, no downloads, no paywalls — open a calculator, get your answer, move on with your day.

Accuracy

Our calculators use standard, published formulas (amortization, Mifflin-St Jeor, Heron's formula and the like). Results are estimates for general information and education; they are not financial, medical or legal advice. For important decisions, confirm with a qualified professional.

Contact

Questions or suggestions? Reach us at contact or via the contact page.