Unit Descriptions

1 Gradian:1 gradian is exactly 1/400 of a revolution or 2π/400 or 0.9°. In terms of the SI unit radians 1 grad is approximately 15.707 963 x 10^-3 rad.

1 Radian:1 Radian is defined as the angle subtended at the center of a circle by an arc whose length is equal to the circle's radius. One full turn is 2π radians.