Everyday math
Four-function calculator
Add, subtract, multiply, and divide, with percent and square roots. Results update as you type.
How to use
Type, and the result follows
Type an expression or tap the keys, and the result appears on the same line. Press Enter, or the equals key, to start a new line and keep earlier answers in view. Parentheses work the way they do on paper, and division shows as a stacked fraction while you type.
Questions
How does percent work?
The % key divides the number before it by 100, so 50% is 0.5 and 200*15% is 30.
What does ans do?
ans is the result of the most recent line above, so you can keep working from your last answer.
Why does 0.1+0.2 show 0.3?
Results are rounded to 12 significant digits, which hides the tiny binary rounding errors computers make with decimals.
Can I type on a phone?
Yes. The on-screen keypad is there by default. Tap Keyboard if you want your phone's own keyboard instead.