Convert any angle unit
Convert between degrees, radians and gradians. The result updates as you type, and negative angles work.
A full turn is 360 degrees, 2π radians or 400 gradians. The gradian, also called a gon, is exactly 0.9 degrees, so degrees and gradians convert exactly.
Units at a glance
| Unit | Symbol | Size |
|---|---|---|
| degrees | ° | The base unit for angle. |
| radians | rad | 1 radian = 57.2957795131 degrees |
| gradians | grad | 1 gradian = 0.9 degrees |
Radians in calculators and code
Programming languages and most scientific calculators use radians for trigonometric functions. If a sine or cosine looks wrong, check whether the angle was given in degrees.
π
Radians are shown as decimals, so 180 degrees appears as 3.14159 rather than "π". Choose more decimal places, or the maximum precision, if you need more digits.