Scientific Calculator

Numbers and + − × ÷ ^, parentheses, ! for factorial and % for percent, plus functions: sin cos tan asin acos atan sinh cosh tanh sqrt cbrt root(x, n) ln log log2 log(x, base) exp abs round floor ceil min max nCr nPr mod, the constants π (or pi) and e, and ans for the last result. 2π and 3(4 + 5) multiply.

Powers are worked out before the minus sign, as in standard mathematical notation, so −2² means −(2²). Write (−2)^2 to get 4.

Left to right: 6 ÷ 2 = 3, then 3 × (1 + 2) = 9. Some calculators give implied multiplication priority and return 1, which is why that expression is argued about. Adding parentheses makes the meaning clear either way.

Choose with the switch above the keys. It affects the trigonometric functions and their inverses. In degrees, values like sin(180) come out exactly 0 rather than a tiny rounding error.

It calculates with standard double-precision numbers (about 15 to 16 significant digits) and shows up to 12, so everyday rounding noise like 0.1 + 0.2 = 0.30000000000000004 doesn’t appear.

It is free to use and there is nothing to sign up for. There are no watermarks and no daily limits.