Convert Revolutions per day to Revolutions per minute
Convert Revolutions per day (rev/d) to Revolutions per minute (rpm) instantly and accurately.
Conversion Formula
rpm = rev/d × 0.0006944444444
About Revolutions per day
The revolution per day (rev/d) equals π/43200 rad/s ≈ 7.272 × 10⁻⁵ rad/s, the scale of planetary rotation and orbital mechanics. Earth spins at 1.00274 rev/day (sidereal); Mars at 1.027 rev/day (sol = 24 h 37 min); Jupiter at 2.417 rev/day. Geostationary satellites orbit at exactly 1 rev/solar day; Molniya HEO satellites at 2 rev/day. The Moon is tidally locked at 1/27.322 rev/day. IERS Bulletin A tracks Earth's deviation from 1 rev/solar day to 0.1 ms precision. 1 rev/d ≈ 7.272 × 10⁻⁵ rad/s ≈ 6.944 × 10⁻³ rpm.
About Revolutions per minute
The revolution per minute (rpm) equals π/30 rad/s ≈ 0.1047 rad/s, the most universally recognised rotational speed unit in mechanical engineering. Common references: car petrol engines idle at 600-900 rpm, redline at 5500-8500 rpm; large marine diesel engines run at 75-120 rpm; electric induction motor synchronous speed = 60f/p rpm (3000 rpm at 50 Hz, 2-pole); hard drives at 5400-15000 rpm; dental turbines up to 400000 rpm; washing machine spin 400-1600 rpm. ISO 6336 and ANSI/AGMA gear standards use rpm throughout. 1 rpm = π/30 rad/s = 6 °/s = 1/60 rps.
Quick Reference Table
| Revolutions per day (rev/d) | Revolutions per minute (rpm) |
|---|---|
| 1 rev/d | 0.000694444 rpm |
| 2 rev/d | 0.00138889 rpm |
| 5 rev/d | 0.00347222 rpm |
| 10 rev/d | 0.00694444 rpm |
| 25 rev/d | 0.0173611 rpm |
| 50 rev/d | 0.0347222 rpm |
| 100 rev/d | 0.0694444 rpm |