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 Angular Mil:1 Angular Mil equals exactly 2π/6400 radians. Radians (rad) are the SI unit for measuring a plane angle.