Calculators & Time
Scientific calculator with a live answer
Everything the basic calculator does, plus trigonometry, logarithms, roots and factorials. Type the expression and watch the answer.
The answer appears here as you type.
Type an expression and the answer updates as you go. Enter records it in the history, Escape clears. Functions: sin, cos, tan, asin, acos, atan, sqrt, cbrt, ln, log, log2, exp, abs, round, floor, ceil, min, max, pow. Constants: pi, e, tau. Trigonometry works in radians.
- Runs in your browser
- No account required
- Free to use
How it works
Trigonometry works in radians
sin(pi/2) is 1. That is the mathematical convention and what every programming language uses; if you need degrees, multiply by pi/180. Stating it is worth more than guessing, since a calculator silently in the wrong mode is a classic source of wrong answers.
Functions take brackets
sqrt(16), not sqrt 16. It removes any ambiguity about what a function applies to — `sqrt(4)*2` is 4 and `sqrt(4*2)` is not, and without brackets there is no way to tell which was meant.
Powers are right-associative
2^3^2 is 2⁹, which is 512, rather than 8², which is 64. That is the mathematical convention and the one a scientific calculator is expected to follow.
What it does
The usual function set
sin, cos, tan and their inverses, hyperbolics, sqrt, cbrt, ln, log, log2, exp, abs, round, floor, ceil, sign, min, max, pow and factorial.
Constants
pi, e and tau, usable anywhere a number can go.
Multi-argument functions
min and max take any number of values; pow takes two.
Runs in your browser
No account and no upload — what you type is never sent anywhere. Analytics records that the tool was opened, never what you put into it.
Practical advice
Getting a better result
- For degrees, convert: sin(30 * pi / 180).
- Factorial is exact up to 170; above that the result exceeds what a double can hold and the calculator says so.
- min and max accept a list — max(3, 7, 5) is 7.
Questions
Things people ask
Does it work in degrees or radians?
Radians, which is the mathematical convention. Multiply by pi/180 to convert from degrees — sin(30 * pi / 180) gives 0.5.
Why does sqrt(-1) give an error rather than a result?
Because the answer is imaginary and this calculator works in real numbers. Returning NaN would be technically accurate and practically useless, so it says the function is not defined for that input.
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