Smart Calculator

Arithmetic, percentages, unit conversion, age and date difference — all offline in your browser.

0

Supports + − × ÷, ^ (power), %, and parentheses. Type or use the keypad.

What is % of ?

30

is what % of ?

20%

Increase by %

180

Decrease by %

120

% change from to

+20%

Category

Value

From

To

-

Date of birth

Pick your date of birth.

Age is calculated locally in your browser. Your date of birth is not uploaded to any server.

From date

To date

Pick two dates.

Every calculation runs locally in your browser. Nothing is uploaded, and it works offline.