Online Calculator

Type a full expression with powers and functions, and keep a history.

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How to use Calculator

Type an expression, such as (12 + 8) * 3 / 2 or sqrt(2) ^ 3.
The answer updates as you type, and an error names the part it could not read.
Use ^ for powers, % for percent, and functions like sin(), log() and round().
Press Enter to save the result to your history.

About Calculator

A quick expression evaluator. Type an expression with +, −, ×, ÷, powers, parentheses and percentages, or functions like sqrt(), sin() and log(), and get the result instantly; press Enter to save it to a running history.

Expressions are read by a small built-in parser rather than run as code, so only math gets evaluated.

What people use it for

Evaluate a quick calculation without opening a spreadsheet.
Work through a sequence of sums and keep the history.

Frequently asked questions

What can I type?

Numbers, + − * / ( ), ^ (or **) for powers and % for percent (50% is 0.5). Constants pi, e and tau, and the functions sqrt, cbrt, abs, round, floor, ceil, sin, cos, tan, asin, acos, atan, ln, log, log2, exp, min and max.

Are angles in degrees or radians?

Radians, as in most programming languages. Multiply degrees by pi / 180 first: sin(30 * pi / 180) is 0.5.

Is log base 10?

Yes. log() is base 10, ln() is the natural log and log2() is base 2.

Is it private?

Every calculation happens on this page, in your own browser. Your input is never sent to a server and never logged, which also means the tool keeps working when you are offline.