Angle Converter

Angle: convert between degrees and radians using the exact trigonometric relationship.

Value

Result

From unit

To unit

Works for any combination of the units above -- every value converts through the same verified base-unit math used on the individual pages.

How Angle Units Relate

Degrees and radians are the two dominant ways to measure angle. Degrees divide a circle into 360 arbitrary parts, a convention tracing back to ancient Babylonian mathematics, while radians define a full circle as exactly 2π, tying the unit directly to a circle's geometry.

All Angle Converters

Each of these has its own page with the exact formula, a reference table, and answers to common questions.

By Cedrick Reese, Ready Utilities