About this calculator
Use this calculator for everyday arithmetic: addition, subtraction, multiplication, division, percentages, decimals and negative numbers. It follows normal operator precedence, so multiplication and division are evaluated before addition and subtraction.
Calculations run locally in your browser. CalcNest does not upload or save the expressions you enter.
How to use the calculator
- Enter numbers with the on-screen keypad or your keyboard.
- Choose an operator. You can continue building an expression before pressing equals.
- Press = or Enter to calculate. Press equals again to repeat the last operation.
Keyboard shortcuts
| Key | Action |
|---|---|
| 0–9 and . | Enter a number or decimal |
| + − * / | Add, subtract, multiply or divide |
| Enter or = | Calculate the result |
| Backspace | Remove the last character |
| Escape | Clear the calculator |
Frequently asked questions
Is this calculator free?
Yes. The calculator is free to use and does not require an account or download.
Can I use the keyboard?
Yes. Use the number keys and standard operators, Enter for equals, Backspace to delete, and Escape to clear.
Does Toolume save my calculations?
No. Calculations run locally in your browser and the expressions you enter are not uploaded or saved by CalcNest.
How does the percentage button work?
For addition and subtraction, a percentage is calculated relative to the value before it. For multiplication and division, the percentage is treated as a value divided by 100.