FAHAQ

Scientific Calculator

A full scientific calculator in your browser.

Expression
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Free online scientific calculator. Do arithmetic plus sin, cos, tan, log, ln, square root, powers, percentages and constants like π and e, with parentheses and a radian/degree toggle. Runs in your browser.

How to use the Scientific Calculator

  1. 01Tap digits and operators to build an expression.
  2. 02Use the function keys for sin, cos, tan, log, ln, √ and powers.
  3. 03Toggle RAD/DEG for trig, then press = for the result.

Frequently asked questions

Does it work in degrees or radians?

Both. There's a RAD/DEG toggle in the display; trig functions use whichever mode is active.

What does the % key do?

It converts the preceding value to a percentage — for example 50% evaluates to 0.5 — so you can mix percentages into an expression.