Angle Converter
Convert degrees, radians, gradians, and turns.
Formula: multiply the source value by 0.01745329
Quick Conversions
About this tool
Plane angles convert through the radian. A full turn is 2π rad, 360°, or 400 gon.
How it works
Enter an angle, choose units, and read the converted value. Negative angles are allowed.
value_to = value_from × (from_in_radians / to_in_radians)
Examples
180° to radians
180 × π / 180 = π rad ≈ 3.1416 rad.
FAQ
What is a gradian?
A gon. A right angle is 100 gon, so a full circle is 400 gon.
Are negative angles allowed?
Yes. Direction matters in geometry and navigation.