Online Scientific Calculator
Type a full expression — operators, parentheses, powers and functions like sin, cos, tan, log, ln and sqrt, with pi and e built in — and it evaluates the whole thing. The input is parsed safely rather than run through eval, and it stays entirely in your browser.
- 100% free
- Private & safe
- Runs in your browser
Why use Scientific Calculator?
Scientific Calculator gives you accurate results instantly, with the underlying formula shown so you can trust the numbers.
- Runs instantly in your browser — nothing to install, nothing uploaded.
- Completely free, with no account, no watermarks and no usage limits.
- Handles Operators: + − × ÷ ^ %; Functions: sin, cos, tan, asin, acos, atan, sqrt, cbrt, ln, log, log2, exp, abs; Constants: pi, e.
- Type an expression, or use the button pad.
- Works on any device — desktop, tablet and phone — and is fully keyboard accessible.
How to use Scientific Calculator
- Type an expression, or use the button pad.
- Use functions like sin(), log(), sqrt() and constants pi and e.
- Toggle degrees for trigonometric functions if needed.
- Press = or Enter to evaluate.
Examples
- sin(45) + 2^3 in degree mode.
- log(1000) + sqrt(16).
Formulas
- Operators: + − × ÷ ^ %
- Functions: sin, cos, tan, asin, acos, atan, sqrt, cbrt, ln, log, log2, exp, abs
- Constants: pi, e
Limitations
- Expressions are parsed with a safe evaluator (no eval).
- Uses JavaScript floating-point, so tiny rounding differences can appear.
- Trig defaults to radians unless degrees is enabled.
Frequently asked questions
Does it use degrees or radians?
Radians by default; enable the Degrees toggle for degree-based trigonometry.
Is my input executed as code?
No — a safe parser evaluates the maths; eval is never used.
Which functions are supported?
sin, cos, tan and their inverses, sqrt, cbrt, ln, log, log2, exp and abs, plus pi and e.
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