Unit Descriptions

1 Degree (of arc):1 degree of arc is define as 1/360 of a revolution. In SI units 1° is π/180 radians.

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.