Scientific calculator
Scientific calculations with trigonometry, logarithms, powers and constants. Free.
A full scientific calculator in your browser: trigonometric functions in degrees or radians, logarithms, powers, factorials and math constants.
By VOV · Last updated: October 21, 2026
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How it works
How it works: your expression is evaluated with our own math parser (no eval), with correct operator precedence and nested parentheses support. Trigonometric angles use the selected DEG/RAD mode.
Frequently asked questions
How do I switch degrees/radians?
With the DEG/RAD button: it affects sin, cos, tan and their inverses.
What does "E" mean in the result?
Scientific notation: 1.5E11 means 1.5 × 10¹¹. It appears for very large or very small numbers.
Can I use the keyboard?
Yes: type numbers, + − * / ^ ( ) and press Enter to calculate; C or Escape clears.