About the Units
second (″)
An angular measure equal to 1/60 of a minute or 1/3600 of a degree, used for very precise measurements.
revolution (r)
A complete rotation of 360 degrees or 2π radians, representing one full circle.
Common Conversions
- 1 ″ = 7.7160496e-7 r
- 1296000.0 ″ = 1 r