A calculator online with no app to install — type or tap an expression and see the answer as you go, with scientific functions, and nothing you type ever leaves your device.
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What is Calculator?
A calculator that runs entirely in your browser: nothing to install, no account, and nothing you type leaves your device. Type an expression on your keyboard or tap the keypad and the answer appears as you go; press = or Enter to keep it in the history, and pick any past calculation to use it again. It handles brackets, powers, square roots, sin, cos and tan in degrees or radians, ln, log, π and e, and reads 2π or 2(3+4) the way you would write them on paper. Percent works like a desk calculator — 200 + 10% is 220, while 10% on its own is 0.1 — and answers are rounded to 12 significant digits, so 0.1 + 0.2 shows 0.3.
Calculator
Your keyboard works too: type the expression, then press Enter or = to calculate, Esc to clear and Backspace to delete.
History
Select a calculation to reuse its expression.
No calculations yet. Your last 20 are kept here, on this device only.