Scientific Calculator — Free Online Tool
Full-featured scientific calculator with arithmetic, trigonometric functions (sin, cos, tan), logarithms (log, ln), square root, powers, modulo, and mathematical constants π and e. Expression parsed safely — no eval().
100% client-side. No uploads. Your data never leaves your browser.
How to use Scientific Calculator
- Type an expression or use the buttons.
- Press = to evaluate.
- Press C to clear.
Frequently Asked Questions
Are trig functions in degrees or radians?
Radians — the standard for mathematical trig functions. To convert: degrees × π/180.
Is eval() used?
No — expressions are parsed using a safe recursive descent parser. No eval() or new Function().
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