Convert Degrees per minute to Revolutions per hour
Convert Degrees per minute (°/min) to Revolutions per hour (rev/h) instantly and accurately.
Conversion Formula
rev/h = °/min × 0.1666666667
About Degrees per minute
The degree per minute (°/min) equals π/10800 rad/s ≈ 2.909 × 10⁻⁴ rad/s. The sidereal tracking rate for astronomical telescopes is 0.25 °/min (15 °/h); modern robotic observatories slew at 100-400 °/min between targets. A clock's hour hand turns at 0.5 °/min; the minute hand at 6 °/min. Industrial drum conveyors for cement kilns rotate at 0.5-5 °/min; automotive power-steering columns during parking manoeuvres rotate at 30-180 °/min. 1 °/min ≈ 2.909 × 10⁻⁴ rad/s = 1/60 rpm.
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.
Quick Reference Table
| Degrees per minute (°/min) | Revolutions per hour (rev/h) |
|---|---|
| 1 °/min | 0.166667 rev/h |
| 2 °/min | 0.333333 rev/h |
| 5 °/min | 0.833333 rev/h |
| 10 °/min | 1.66667 rev/h |
| 25 °/min | 4.16667 rev/h |
| 50 °/min | 8.33333 rev/h |
| 100 °/min | 16.6667 rev/h |