Fast, free online calculator with history & keyboard support
History is kept in memory for your current browser session only. Refreshing the page clears it. We never store your calculations on a server.
Yes — the calculator is fully responsive. On mobile, tap the on-screen buttons. The system keyboard is suppressed to keep the experience clean and accurate.
It divides the current number by 100. For example, entering 25 and pressing % displays 0.25. Useful for calculating tips, discounts, and tax amounts quickly.
It uses JavaScript's native number type — IEEE 754 double precision — which supports up to 15–17 significant digits. For everyday arithmetic this is more than sufficient.
Yes. You can type a full expression like 12 + 7 × 3 and hit = to evaluate it. The expression is shown in the display so you always see what you're calculating.