Basic Calculator
What this basic calculator does
This basic calculator is built for quick, reliable everyday math. Use it for simple arithmetic, percentages, and quick corrections without leaving the page.
Calculations run instantly in your browser and update as you enter values. Exact integer results are preserved when possible, with clear indication if a result needs approximation.
What you can calculate
- Everyday arithmetic (addition, subtraction, multiplication, and division)
- Percentages, reciprocals, and factorials
- Scientific notation entry using EXP
- Large integer results with clear handling when approximations are required
Accuracy and precision
Exact integer results are used when possible, including very large integers. When a calculation requires approximation, the display clearly indicates it and continues with a precise numeric result.
How to use it
Enter values with the on‑screen keypad or your keyboard. Results update instantly, and you can copy answers with a click.
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