Basic Calculator
A simple, clean online calculator for everyday math. Free, no sign-up needed.
A Simple, Reliable Online Calculator
Basic Calculator handles everyday arithmetic — addition, subtraction, multiplication, and division — with full keyboard support and safe, deterministic evaluation, so you can quickly work out a number without opening a separate app.
How to use
- Click the number and operator buttons, or use your keyboard.
- Press "=" or Enter to see the result.
- Press "C" or Escape to clear and start a new calculation.
Common use cases
- Quickly checking a sum without switching to another app.
- Working out a running total while shopping or budgeting.
- Doing simple math while filling in a form on the same page.
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