Calculator
Scientific Calculator
Trigonometry, logarithms, powers, roots, and memory — all in your browser, no ads, no sign-up.
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About the Scientific Calculator
The Scientific Calculator is a free online calculator with trigonometric functions, logarithms, powers, roots, constants and memory keys. It works on desktop and mobile and does not need installing.
Trigonometric functions (sin, cos, tan) can work in degrees or radians, so check the mode before calculating. Log is base 10 and ln is the natural logarithm. The keys x², x^y, √, 1/x and % cover common operations, π and e provide constants, and MC, MR, M+ and M− store and recall a value. Brackets control the order of operations.
How to use it
- Enter the expression using the keypad.
- Use brackets for grouping.
- Choose degree or radian mode for trig.
- Press = to evaluate and C to clear.
Tips and good to know
- Use memory to store an intermediate result.
- Very small rounding differences are normal in floating-point calculations.
- Check parentheses if you get an error.
Frequently asked questions
How do I find sin of 30 degrees?
Make sure degree mode is on, then press sin and 30.
What is ln?
The natural logarithm, base e.
Does it keep history?
It shows the current expression only.