Are angles in degrees or radians?

Toggle between DEG and RAD using the button in the upper right. Trig functions (sin, cos, tan) respect this setting.

How is the expression evaluated?

Expressions are parsed with a safe recursive-descent parser (no eval). Standard order of operations applies.

Scientific Calculator

Free online scientific calculator. Supports trigonometric functions (sin, cos, tan), inverse trig, logarithms (log, ln), exponentials, factorials, and constants (π, e). Works in degrees or radians. Keyboard supported.

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Frequently Asked Questions

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