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Specialised calculators for money, health and everyday life. More are added regularly.
How to use this calculator
Click the buttons or type with your keyboard. The result preview updates as you type, and pressing = or Enter gives the final answer. After a result, pressing an operator such as + continues from that result, while typing a number starts a new calculation.
Switch to Scientific mode for trigonometry, logarithms, powers, roots and factorials. Use the DEG / RAD button to choose whether angles are in degrees or radians.
Percentages made easy
The % key works the way most people expect:
- 150 × 20% = 30 (20 percent of 150)
- 150 + 20% = 180 (add 20 percent)
- 150 − 20% = 120 (subtract 20 percent, e.g. a discount)
Keyboard shortcuts
| 0–9 . | Numbers and decimal point |
| + - * / | Add, subtract, multiply, divide |
| ^ % ! ( ) | Power, percent, factorial, brackets |
| Enter or = | Calculate |
| Backspace | Delete last character |
| Esc | Clear everything |
Frequently asked questions
Is this calculator free?
Yes. It is completely free, works in any modern browser on computers, tablets and phones, and needs no download or sign-up.
Is my data private?
All calculations happen in your browser. Your history is stored only on your own device and you can clear it at any time.
What is the difference between DEG and RAD?
DEG means angles are measured in degrees (a full circle is 360°). RAD means radians (a full circle is 2π). Most everyday and school problems use degrees.
In what order are operations calculated?
The calculator follows standard order of operations: brackets first, then powers, then multiplication and division, then addition and subtraction. So 2 + 3 × 4 = 14.