Scientific Calculator
betaThis free scientific calculator evaluates expressions with functions (sin, cos, tan, ln, log, √), powers, parentheses and constants like π and e. Type an expression or tap the keypad, switch between degrees and radians, and get the answer instantly — all in your browser.
A scientific calculator that runs in your browser. Type an expression or tap the keys; supports functions, powers and constants.
How to use Scientific Calculator
- 1 Type an expression in the display, or tap the keypad buttons.
- 2 Use the DEG/RAD toggle to set the angle mode for trig functions.
- 3 Press = (or Enter) to evaluate; use C to clear and ⌫ to delete.
- 4 Combine functions and parentheses, e.g. sqrt(2)^2 or sin(30).
Frequently asked questions
Does it run offline / privately?
Yes. The calculator evaluates expressions in your browser with no server call, so it works offline and nothing you type is sent anywhere.
Which functions are supported?
sin, cos, tan, asin, acos, atan, ln, log (base 10), sqrt, abs and exp, plus the constants π and e, powers with ^, and parentheses.
Degrees or radians?
Both. Use the DEG/RAD toggle before evaluating trig functions — for example sin(90) in degrees gives 1.
Is it safe? Does it use eval?
It uses a small custom parser (no JavaScript eval), so it only ever does arithmetic — it cannot run arbitrary code.