Scientific calculator
Type or tap expressions with live answers and history.
About this calculator
Type a whole expression or tap the keys, and the answer updates as you go. It handles brackets, sin, cos, tan and their inverses, ln, log, roots, powers and factorials.
Switch between degrees and radians with one tap, and pick any past result from the history to use it again.
How it works
Standard maths precedence applies, so -2^2 is -4 and 2^3^2 is 512. % divides by 100. Answers show up to 12 significant digits.
The story behind it
Where the idea came from: The HP-35 from Hewlett-Packard, the first pocket scientific calculator, 1972.
For generations, engineers worked out trigonometry and logarithms with slide rules and printed tables. When the HP-35 arrived in 1972, it could do those functions in a pocket, and within a few years slide rules had all but vanished. Our scientific calculator runs in your browser, lets you type a whole expression, and follows standard order of operations.
Why you can trust this calculator
- It runs in your browser. Nothing you type into it is sent anywhere.
- The method is explained on this page, so you can check it yourself.
- Free to use, with no sign-up.
- Results are estimates, so please double-check anything important.
- Spotted a mistake? Tell us and we'll look into it.
After 15 years as a mathematics educator, I built CalculStore to give students, teachers, professionals and anyone working with numbers simple, reliable tools.
Meet the founder