Add, subtract, multiply, and divide instantly. Works with mouse, touch, or keyboard — plus a built-in history panel for recent results.
Use your keyboard anywhere on this page (except text fields).
Common everyday calculations this tool handles.
| Operation | Example | Result |
|---|---|---|
| Addition (+) | 125 + 375 | 500 |
| Subtraction (−) | 1,000 − 247 | 753 |
| Multiplication (×) | 24 × 15 | 360 |
| Division (÷) | 144 ÷ 12 | 12 |
| Percent (%) | 250 then % | 2.5 |
A basic calculator (also called a simple or four-function calculator) performs the four core arithmetic operations: addition, subtraction, multiplication, and division. Unlike a scientific calculator, it does not include trigonometry, logarithms, or graphing — which keeps the interface fast and easy for everyday math.
This free online basic calculator runs in your browser with no download required. It supports decimal numbers, negative values, percentage conversion, chain calculations (e.g. 50 + 20 × 2), and a scrollable history so you can reuse recent answers.
This calculator evaluates operations left to right as you enter them — the same way most handheld four-function calculators work. For example, 10 + 5 × 2 gives 30 (not 20), because it computes 10 + 5 first, then multiplies by 2. If you need PEMDAS/BODMAS priority (multiplication before addition), use parentheses in a scientific calculator or work step-by-step.
| Feature | Basic Calculator | Scientific Calculator |
|---|---|---|
| +, −, ×, ÷ | Yes | Yes |
| Percent & decimals | Yes | Yes |
| sin, cos, tan | No | Yes |
| Logarithms & powers | No | Yes |
| Best for | Daily arithmetic | Algebra, trig, physics |
Yes. This basic online calculator is completely free — no sign-up, no install, and no limits on how many calculations you run.
A standard basic calculator supports addition (+), subtraction (−), multiplication (×), and division (÷), along with decimals, negative numbers, and percent conversion.
Yes. Use number keys and +, −, *, / for operations. Press Enter or = for the result, Backspace to delete, Escape to clear, and % for percent.
Division by zero is undefined. The display shows an error message. Press AC or Escape to reset and start a new calculation.
Completed calculations appear in the History panel during your session. History clears when you close the tab or press Clear in the history panel.
A basic calculator handles everyday arithmetic only. A scientific calculator adds advanced functions like trigonometry, logarithms, exponents, and parentheses for complex expressions.