Scientific calculator
Online scientific calculator with sine, cosine, tangent, log, root, power, factorial and history.
Scientific calculator.
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Scientific calculator: what it is for
The scientific calculator handles parentheses, powers, roots, logarithms (log and ln), trigonometry in degrees or radians, factorial, percentages and the constants π and e.
The result shows as you type, your latest calculations stay in the history and you can use your computer keyboard.
How to use
- Type the calculation with the buttons or the keyboard.
- Choose DEG or RAD for trig functions.
- Press = or Enter for the result.
When to use it
- Physics and math exercises.
- Engineering and technical course calculations.
- When there's no calculator around.
Frequently asked questions
Does it work with the keyboard?
Yes. Type numbers and operators, Enter to calculate, Backspace to delete and Esc to clear.
How do I switch between degrees and radians?
Use the DEG/RAD button in the corner. In DEG, sin(30) = 0.5.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.