Scientific Calculator
A free online scientific calculator. Type or tap your sum and see the answer as you go, with trigonometry in degrees or radians, logarithms, powers, roots, factorials and a history of your last calculations.
What it can do
+ − × ÷ · xʸ · √ · n! · % · sin cos tan and their inverses · log (base 10) · ln · π · e · brackets
Numbers next to brackets or constants multiply: 3(4 + 1) is 15 and 2π is 6.283… A percent sign divides by 100, so 50% is 0.5.
Examples
sin(30) = 0.5 in degrees · 2^10 = 1,024 · 5! = 120 · log(1000) = 3 · √16 + 1 = 5.
Your last ten calculations are saved in your browser; tap one to use it again.
Questions people ask
How do I use degrees or radians?
Use the DEG and RAD switch above the display. In degrees, sin(30) is 0.5; in radians, sin(π/2) is 1.
What order does it calculate in?
Brackets first, then powers, then multiplication and division, then addition and subtraction. So 2 + 3 × 4 is 14, and 2^3^2 is 2^9 = 512.
Can I type instead of tapping?
Yes: type into the display and press Enter. You can write × or *, ÷ or /, and use pi, e, sqrt, sin, cos, tan, log and ln.
What does Ans do?
It inserts your last answer, so you can carry on a calculation. Pressing an operator right after = also continues from the answer.
About this calculator
Formula and rules last checked 25 October 2026Written and tested by the CalculatorDex teamReport a problem