Math
Scientific Calculator
Free online scientific calculator with sin, cos, tan, log, sqrt, exponents, factorial, pi, and degrees/radians toggle.
Scientific calculator
Result
Enter an expression.
Frequently Asked Questions about the Scientific Calculator
What functions does this scientific calculator support?
The calculator supports trig (sin, cos, tan, asin, acos, atan), roots (sqrt, cbrt), logarithms (log for base 10, ln for natural log), exp, abs, floor, ceil, round, postfix factorial (!), and exponentiation (^). Built-in constants are pi and e (Euler's number, approximately 2.71828).
How do I switch between radians and degrees?
Use the Rad/Deg toggle at the top of the calculator. All six trig functions and their inverses respect the selected mode automatically, so sin(90) in degree mode and sin(pi/2) in radian mode both return 1.
What does sin(pi/2) equal?
In radian mode, sin(pi/2) returns exactly 1. If you switch to degree mode, type sin(90) to get the same result. The calculator uses the built-in constant pi, so you can type pi/2 directly without entering 3.14159...
How do I compute square root or cube root?
Type sqrt(x) for the square root and cbrt(x) for the cube root. For any other root, use the exponent operator: 32^(1/5) gives the fifth root of 32, which is 2. Note that sqrt of a negative number returns an error because the result is not a real number.
Can I use scientific notation?
Yes. Type 1e6 for 1,000,000 or 2.5e-3 for 0.0025 directly in your expression. You can also combine it with functions, for example sqrt(1e4) returns 100. Very large or very small results are displayed in scientific notation automatically.