Calculator
A free calculator that runs in your browser. Four basic operations, percentage, sign toggle and full keyboard support.
How to use
- 1
Enter numbers
Click the buttons or type with your keyboard.
- 2
Calculate
Use +, -, ×, ÷ and press = for the result.
- 3
Use the result
Copy the result anytime. Press C to start over.
Features
- Four basic operations plus percentage
- Full keyboard support (numbers, Enter, Backspace)
- Sign toggle (±) and decimal input
- Runs entirely in your browser with no saved history
Use cases
Shopping totals
Check totals at the register or compare prices while planning your budget.
Splitting bills
Calculate shared meal costs or reimburse travel expenses on the spot.
Work estimates
Unit price times quantity, tax-inclusive totals and other on-the-job math.
Details
This calculator handles the four basic operations (addition, subtraction, multiplication and division) entirely in your browser. Use it for shopping totals, splitting bills, work estimates or adjusting recipe quantities.
Besides the buttons, it fully supports your keyboard: number keys, +, -, *, /, Enter and Backspace let you type without looking away from the screen. The percent (%) button makes percentage and discount calculations easy.
Everything runs in your browser and your numbers are never sent anywhere. No calculation history is stored on your device, so sensitive figures stay private.
FAQ
Can I use the keyboard?
Yes. Number keys, +, -, *, /, Enter, Backspace and the decimal point (.) are all supported.
How do I calculate percentages?
Enter "100 × 20%" to get 20 - that is, 20% of 100. Handy for discounts.
What happens when I divide by zero?
An error message is shown and you can start over with C.
Is my calculation saved?
No. Everything runs in your browser and nothing is saved or sent.
Related Tools
Discount Calculator
Calculate final price and savings for one or two percentage discounts. Stack 30% off with 10% off to see the true 37% effective discount.
Tax Calculator
Calculate tax-included and tax-excluded prices with automatic tax amounts. Supports 10%, 8% and custom rates.
Unit Converter
Convert length, weight and temperature instantly. Meters, inches, kilograms, pounds and more.
Percentage Calculator
Three modes for instant percentage math: X% of a total, X as a % of Y, and increase or decrease by X%.
All processing happens in your browser. Your files are never uploaded.
Did you know?
The abacus, one of the oldest calculators, has origins dating back about 5,000 years to Mesopotamia.