How it works
Type an expression with +, −, ×, ÷, parentheses, powers (^), square root, sin, cos, tan (in degrees), log (base 10), ln (natural log), π, e, % (percent, as in 50% = 0.5), and ! (factorial, whole numbers 0–170 only). Standard order of operations applies: parentheses first, then powers, then multiplication and division, then addition and subtraction — so 2+3×4 is 14, not 20.
Frequently asked questions
Are angles in degrees or radians?
Degrees, the way most school and everyday calculators work. sin(30°) = 0.5.
What does % do?
It divides the number before it by 100, so 50% becomes 0.5 and 200×10% is 20.
Why do I see an error?
Usually a missing closing parenthesis, a function without an argument, a square root or log of a number that does not allow it, or a factorial that is not a whole number. Fix the highlighted part and try again.