How does it work?
- Type your calculation the way it’s written: 2 + 3 × 4. The order of operations is respected: multiplication comes before addition.
- The result shows in small type as you go; “=” confirms it and saves it in the history.
- After “=”, an operator carries on from the result and a digit starts a new calculation. “Copy result” pastes straight into a spreadsheet.
Keyboard shortcuts
- Digits and operators: 0 to 9, +, -, * (multiply), / (divide), %.
- Decimal point: the period key, or the comma key.
- Enter or =: calculate.
- Backspace: delete the last digit; Esc: clear all.
- Ctrl + C or ⌘ + C: copy the result; Ctrl + V or ⌘ + V: paste a number or a calculation.
Frequently asked questions
In what order does the calculator work things out?
In the order you learned at school: multiplication and division first, then addition and subtraction, from left to right. So 2 + 3 × 4 makes 14, not 20 as on pocket calculators that work things out as you go.
How does the % key work?
Like a desk calculator: 200 + 10% adds 10% of 200 (220), 200 − 10% takes off 10% (180, handy for a discount), 200 × 10% gives 10% of 200 (20). On its own, 10% is 0.1.
Why does 0.1 + 0.2 really make 0.3 here?
Many programs calculate in binary, where 0.1 can’t be written exactly: they show 0.30000000000000004. This calculator counts in decimal, like you do on paper, and rounds the result to 15 significant digits.
What about very large or very small numbers?
Beyond 15 digits, the result switches to scientific notation: 1.5 × 10¹⁸ means 1.5 multiplied by 10 eighteen times, that is 15 followed by 17 zeros. The same goes for numbers smaller than a billionth.
Are my calculations sent anywhere?
No: everything is worked out in your browser. The history of your last 20 calculations stays on your device; “Clear history” empties it.
