FREE · EDUCATION & SCIENCE
Scientific Calculator.
Free online scientific calculator with trigonometry in degrees or radians, logarithms, powers, roots, factorials, nCr, memory and a history of results.
Type with the keyboard or the keys. Supports implicit multiplication (2π, 3(4+1)), powers (2^10), factorial (5!), percent (20%), nCr(10,3), log(x, base), root(x, n) and mod(a, b). Enter calculates, Esc clears.
How to use Scientific Calculator
Type an expression or use the keys, then press = or Enter. Choose DEG, RAD or GRAD for angles. Ans reuses the last result; M+ and M− keep a running memory. Click a history line to edit it again.
How it works
Expressions are parsed by a small recursive-descent parser (no eval): powers are right-associative, −2^2 is −4, implicit multiplication such as 2π and 3(4+1) works, and % divides by 100. Trigonometric results within 1e-14 of zero are shown as exactly zero.
Example
In degree mode, 2sin(30) + 5! gives 121, and 0.1 + 0.2 shows 0.3 instead of floating-point noise.
Questions about Scientific Calculator
Is Scientific Calculator free, and do I need an account?
Yes. This tool is free to use in your browser without an account. Processing takes place on your device.
What are the limits and what should I check?
Double-precision arithmetic shown to 15 significant digits. Factorials of whole numbers up to 170. No complex numbers, units or graphing. History is kept only in this browser. Everything is calculated in your browser; nothing you type is uploaded. Review the result before using it in your work.
Is my input sent to a server?
Your input is processed in your browser and is not uploaded by this tool. Files and pasted text are cleared when the page is refreshed. Normal website requests are still required to load the page and its libraries. Read the privacy explanation.