Convert Degrees per hour to Revolutions per hour
Convert Degrees per hour (°/h) to Revolutions per hour (rev/h) instantly and accurately.
Conversion Formula
rev/h = °/h × 0.002777777778
About Degrees per hour
The degree per hour (°/h) equals π/648000 rad/s ≈ 4.848 × 10⁻⁶ rad/s, the universal benchmark for gyroscope drift rate. Performance tiers: consumer MEMS (smartphone) 30-2000 °/h; tactical grade (guided munitions) 0.1-30 °/h; navigation grade (commercial aircraft) 0.001-0.1 °/h; strategic grade (submarines, ICBMs) below 0.001 °/h. Earth's rotation rate of 15.041 °/h is the calibration reference for every gyrocompass. A 0.01 °/h drift yields about 1.1 km position error after 1 hour of unaided inertial navigation at the equator. 1 °/h ≈ 4.848 × 10⁻⁶ rad/s.
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 hour (°/h) | Revolutions per hour (rev/h) |
|---|---|
| 1 °/h | 0.00277778 rev/h |
| 2 °/h | 0.00555556 rev/h |
| 5 °/h | 0.0138889 rev/h |
| 10 °/h | 0.0277778 rev/h |
| 25 °/h | 0.0694444 rev/h |
| 50 °/h | 0.138889 rev/h |
| 100 °/h | 0.277778 rev/h |