Convert Revolutions per hour to Revolutions per second
Convert Revolutions per hour (rev/h) to Revolutions per second (rps) instantly and accurately.
Conversion Formula
rps = rev/h × 0.0002777777778
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 Revolutions per second
The revolution per second (rps) equals 2π rad/s ≈ 6.283 rad/s = 60 rpm, used for high-speed machines where rpm values become unwieldy. Numerically equal to hertz (Hz): a 100 rps rotor produces 100 Hz unbalance vibration, directly readable on an FFT spectrum. Gas turbine HP spools (GE GEnx) operate at 100-200 rps at cruise. Ultracentrifuges (Beckman Optima MAX-XP) reach 1333 rps (80000 rpm, 600000 × g). NMR magic-angle spinning probes rotate solid samples at 5-170 rps. Dental air turbines peak at 400-800 rps. 1 rps = 2π rad/s = 60 rpm = 360 °/s.
Quick Reference Table
| Revolutions per hour (rev/h) | Revolutions per second (rps) |
|---|---|
| 1 rev/h | 0.000277778 rps |
| 2 rev/h | 0.000555556 rps |
| 5 rev/h | 0.00138889 rps |
| 10 rev/h | 0.00277778 rps |
| 25 rev/h | 0.00694444 rps |
| 50 rev/h | 0.0138889 rps |
| 100 rev/h | 0.0277778 rps |