Quick calculations / Accessible
Big Button Calculator: Large, Simple, and Easy to Read
A plain calculator with large keys and a large display, easy to use on a phone, a tablet, or a screen far away: add, subtract, multiply, divide, and take percentages, switch to yellow on black, have the numbers read aloud, and see your last calculations.
Big Button Calculator: Large, Simple, and Easy to Read: It works like a simple pocket calculator, from left to right, so 2 + 3 × 4 gives 20, not 14. The percent key takes a percentage of the first number when adding or subtracting: 200 + 10% gives 220. Results are rounded to 12 significant digits so that 0.1 + 0.2 shows 0.3. Runs 100% locally in your browser with zero server file uploads.
- Category
- Everyday tools
- Runs
- In your browser
- Cost
- Free · no sign-up
- Availability
- Ready to use
Runs entirely in your browser
Works like a simple pocket calculator, from left to right: 2 + 3 × 4 gives 20. The percent key takes a percentage of the first number when adding or subtracting, so 200 + 10% gives 220. You can also type on the keyboard: Enter for equals, Backspace to delete, Escape to clear.
Percentages
For percentage questions such as what percentage one number is of another, use the percentage calculator.
Order of operations
For sums that need brackets or the usual order of operations, use the scientific calculator.
How to use it
- Press the keys, or type on the keyboard.
- Turn on high contrast or spoken numbers if they help.
- Check recent calculations in the list below.
Privacy & limitations
Everything is calculated in your browser.
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Frequently asked questions
Why does 2 + 3 × 4 give 20?
Simple calculators work through the sum in the order you type it, as this one does; scientific calculators multiply first and would give 14.
How do I use it with the keyboard?
Type numbers and + − * /, press Enter for equals, Backspace to delete the last digit, and Escape to clear.
Can it read the numbers aloud?
Yes: turn on reading aloud and it speaks each digit and the result with your device's voices.
Free tool · runs in your browser · no account required