Standard Calculator

Arithmetic, percent, square root, and memory keys

A basic calculator for everyday arithmetic — add, subtract, multiply, divide, percentages, square root, and sign change, plus memory keys (M+, M−, MR, MC). Enter numbers on the keypad and get instant results, all in your browser.

M=0

How to use

Click the number and operator keys, or type on your keyboard.
Use the percent key for quick percentage maths and √ for square roots.
Store a value with M+, recall it with MR, and clear memory with MC.
Press C to clear the current entry or AC to reset everything.

Examples

Entering 200 × 15 % returns 30 — useful for quick tip or discount maths.
Use M+ to add a running total to memory, then MR to recall it.

Verify outputs before using in production. No warranty — see Terms.