Online math expression evaluator
Evaluate a math expression (operators, parentheses, functions) directly in your browser.
Operators: + − * / % ^ · Functions: sqrt, cbrt, abs, ln, log, log2, exp, sin, cos, tan, round, floor, ceil, fact… · Constants: pi, e, tau, phi.
🔒 100% client-side — no data sent
Evaluate any math expression directly in your browser: operators, parentheses, powers, functions (sqrt, sin, log…) and constants (pi, e). The calculation runs locally, without eval() or a server: nothing is sent.
What is it for?
- ▸ Quickly compute a complex formula
- ▸ Check a result with trigonometric functions
- ▸ Use powers and roots without a calculator
- ▸ Evaluate an expression with constants (pi, e)
FAQ
Which operators are supported?
Addition, subtraction, multiplication, division, modulo (%) and power (^), with parentheses and unary minus.
Which functions are available?
sqrt, cbrt, abs, ln, log, log2, exp, sin, cos, tan, asin, acos, atan, round, floor, ceil, fact and more.
Is eval() used?
No. A custom recursive-descent parser evaluates the expression, avoiding any risk associated with eval().
Are angles in radians?
Yes, trigonometric functions use radians, like in JavaScript. Use pi to convert from degrees.