Scientific Calculator
A free online scientific calculator with trigonometry, logarithms, powers, roots, constants, memory and a full history you can scroll back through.
Calculator
History
Results you commit with Enter are kept here. Click one to reuse it.
What this tool is for
Type an expression the way you would write it and see the result as you go, with the whole history kept on screen so you can check a step from three calculations ago. Full keyboard support, and every intermediate result stays visible instead of vanishing behind an equals sign.
How to use it
- Type an expression such as sin(45) + sqrt(16) * 2, or use the buttons.
- Switch between degrees and radians for trigonometry.
- Press Enter to commit a result to the history, and click any history line to reuse it.
Frequently asked questions
Degrees or radians?
The toggle sits next to the trigonometric buttons. Radians is the default in most programming languages, degrees is what most people expect on a calculator, so the current mode is always shown.
Which operator precedence is used?
Standard mathematical precedence: powers, then multiplication and division, then addition and subtraction, with parentheses overriding. It is not a left-to-right pocket calculator.