A free, browser-based calculator for quick arithmetic. No downloads, no registration — just open and start calculating.
Click the number buttons to enter digits, then press an operator (+, -, ×, ÷) followed by the next number. Press = to see the result.
Use the C button to clear the display and start a new calculation.
You can enter decimal numbers by pressing the . button. The calculator supports both mouse clicks and your keyboard, so you can type digits and operators directly.
Example 1 — Budget math. Calculate a monthly total: 1200 + 350 + 89.99. Enter 1200, press +, type 350, press +, type 89.99, then press = to get 1639.99.
Example 2 — Splitting a bill. If a dinner costs 84.50 for three people, compute 84.5 ÷ 3 by entering 84.5, pressing ÷, typing 3, and pressing =. The result is 28.1666…, which you can round to $28.17.
Example 3 — Percentage. To find 15% of 200, multiply: 200 × 0.15. Enter 200, press ×, type 0.15, press = to get 30.
Can I use my keyboard?
Yes. The calculator accepts input from your keyboard: digits, operators (+, -, *, /), Enter for equals, and Escape or Backspace to clear.
What happens if I divide by zero?
Dividing by zero is mathematically undefined. The calculator will not return a result and keeps your input so you can correct it instead of showing a confusing error value.
Does it handle decimal numbers?
Yes. Press the . button to enter decimals such as 3.14 or 0.5. Results may show long decimal expansions; use rounding to the precision you need.
Is my calculation saved anywhere?
No. Everything stays in your browser tab. Closing or refreshing the page discards your input, and nothing is sent to any server.
Can I chain multiple operations?
Yes, you can keep pressing operators after a result to chain further calculations, for example 10 + 5 = 15 × 2 = 30.
=after entering an operator instead of the second number — always type both operands first..(decimal point) with a thousands separator — enter 1000 as 1000, not 1.000.