How do I use the calculator?
Click the buttons or use your keyboard – number keys, +, -, *, / and Enter all work exactly as you'd expect. Backspace removes the last character, AC clears everything, and % converts your current value to a percentage.
The formula bar above the display keeps a running record of what you've entered, so you can double-check your sum before pressing equals.
Does it follow the order of operations?
Yes. Multiplication and division are calculated before addition and subtraction, in line with standard mathematical convention (BODMAS/PEMDAS), so entering 2 + 3 × 4 correctly returns 14 rather than 20.
Can I chain multiple calculations together?
Yes – keep entering operators and numbers after pressing equals and the result carries forward, so you can build up longer sums without starting over each time.
What does the +/- button do?
It flips the sign of the current number between positive and negative, which is handy for calculations involving debits, temperature changes or offsets without having to type a minus sign manually.
Is my data saved anywhere?
No. All calculations happen locally in your browser using JavaScript, so nothing you type is stored or sent anywhere.
What can this calculator be used for?
- Quick everyday sums without opening a spreadsheet
- Working through multi-step arithmetic with a visible history
- Calculating percentages, discounts or tips on the fly
What if I need percentages or averages specifically?
This calculator handles general arithmetic well, but for dedicated percentage sums try the percentage calculator, or for means, medians and ranges across a whole list of numbers, use the average calculator.