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A full scientific calculator, free online
This calculator handles everyday arithmetic and scientific maths: trigonometry (in degrees or radians), inverse trig, natural and base-10 logarithms, powers and roots, factorials, percentages, and the constants π and e. It keeps a running tape of your calculations — click any line to reuse the result — and has memory keys (MC, MR, M+, M−).
You can type directly with your keyboard: digits and operators work as expected, Enter equals, Backspace deletes and Esc clears.
Frequently asked questions
Does the calculator work in degrees and radians?
Yes. Use the DEG / RAD switch at the top left. All trigonometric functions (and their inverses) follow the mode you choose.
Can I use my keyboard?
Yes — type numbers and operators directly, press Enter to evaluate, Backspace to delete and Esc to clear.
What is the tape at the bottom?
It is a running history of your calculations. Click any line to drop its result back into the current expression.
Is it free and private?
Completely. It runs entirely in your browser — nothing you calculate is sent anywhere.