Calculator is a free math & calculators tool that runs entirely in your browser — expression evaluator with history. No upload, no account, no limits.
A quick expression evaluator. Type an arithmetic expression with +, −, ×, ÷, parentheses and percentages and get the result instantly; press Enter to save it to a running history. Only numbers and math operators are allowed, so it's safe.
Numbers, + − * / ( ) and % — percentages are converted to /100. Anything else is rejected.
Every calculation happens on this page, in your own browser. Your input is never sent to a server, never logged and never used for training — which also means the tool keeps working when you are offline.