A free online calculator with scientific functions, keyboard input and a history of your recent calculations. No ads, no signup — runs entirely in your browser.
This tool needs JavaScript to run. Nothing is sent to a server — it works entirely in your browser. The code is open source: view it on GitHub.
A free online calculator that works like a real one: type a whole expression, press Enter, and get the answer. Switch to scientific mode for trigonometry, logarithms, powers and roots.
Yes. Type numbers and operators directly, use parentheses for grouping, and press Enter to evaluate. Backspace edits the expression and Escape clears it.
Trigonometric functions (sin, cos, tan and their inverses), logarithms (log and ln), exponents and roots, factorial, percentages, and the constants π and e. A toggle switches between degrees and radians.
Each evaluated expression and its result is added to a history panel. Tap an entry to put it back into the input. The history is stored in your browser and can be cleared at any time.
Yes — no ads, no account and no downloads. Everything runs in your browser and nothing is sent to a server.