Convert Revolutions per hour to Radians per minute
Convert Revolutions per hour (rev/h) to Radians per minute (rad/min) instantly and accurately.
Conversion Formula
rad/min = rev/h × 0.1047197551
About Revolutions per hour
The revolution per hour (rev/h) equals π/1800 rad/s ≈ 1.745 × 10⁻³ rad/s, used for very slow rotating machinery. Cement rotary kilns - the world's longest continuously rotating machines (up to 230 m, 4000 t) - rotate at 1-5 rev/h; ball mills for ore grinding at 10-20 rev/h; concrete mixer trucks at 1-4 rev/h during transport. Large astronomical antenna drives and slow-scan telescope azimuth movements are also conveniently expressed in rev/h. 1 rev/h = π/1800 rad/s ≈ 0.02778 rpm.
About Radians per minute
The radian per minute (rad/min) equals 1/60 rad/s ≈ 0.01667 rad/s, convenient for wind turbine rotors and slow industrial drives. Large direct-drive offshore wind turbines (14-15 MW, e.g. Siemens Gamesa SG 14-222, Vestas V236) rotate at 4-15 rad/min (0.064-0.24 rpm). Pharmaceutical coating pans rotate at 0.5-10 rad/min; large CNC rotary tables for turbine disc machining run at 0.2-8 rad/min. VLT 8.2 m telescope tracks stars at the sidereal rate π/720 ≈ 0.00436 rad/min. 1 rad/min = 1/60 rad/s ≈ 0.1592 rpm.
Quick Reference Table
| Revolutions per hour (rev/h) | Radians per minute (rad/min) |
|---|---|
| 1 rev/h | 0.10472 rad/min |
| 2 rev/h | 0.20944 rad/min |
| 5 rev/h | 0.523599 rad/min |
| 10 rev/h | 1.0472 rad/min |
| 25 rev/h | 2.61799 rad/min |
| 50 rev/h | 5.23599 rad/min |
| 100 rev/h | 10.472 rad/min |