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Free math calculators

Simple, private calculators for scientific and everyday maths. Every result comes with a plain-English explanation of how it was worked out.

Scientific Calculator

A full scientific calculator for trigonometry, logarithms, powers, roots and more.

How these calculators work

Expressions are parsed and evaluated by a small calculator engine built for this site, following standard order of operations (PEMDAS).

Everything is calculated in your browser. The numbers you type in are not sent to our servers or stored.