Free Scientific Calculator

Yes. Type the expression as you would write it: digits, + − * / ^ ( ), ! for factorial, % for percent and function names such as sin, cos, log or sqrt. Enter gives the answer, Esc clears.

Use the Deg / Rad switch above the expression. It changes how sin, cos and tan read their angle and how their inverses give it back. In degrees, sin(30) = 0.5 and tan(90) is undefined.

Computers store most decimals as binary fractions, which adds tiny errors. The calculator rounds every answer to 15 significant digits, which removes them without hiding real precision.

50% is 0.5. Added to or taken from a number, it means a share of that number: 200 + 10% = 220 and 200 − 25% = 150, like a desk calculator.

sin, cos, tan and their inverses, sinh and cosh, ln, log (and log(x, b) for any base), eˣ, 10ˣ, square, cube, powers, square, cube and n-th roots, factorial (including decimals), nCr, nPr, mod and absolute value, plus π, e and Ans.

The last 50 calculations, the memory and the angle setting are kept in your browser so they are there next time. Clear removes the history.

Yes. No sign-up, no limits, and it works in your browser.