1 rad/s in every unit
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- Revolutions per Minute (RPM)9.549297 rpm
- Degree per Second57.29578 °/s
Popular conversions
2 pairsRevolutions per Minute (RPM) ↔ Radian per Second
rpm ↔ rad/s
Revolutions per Minute (RPM) ↔ Degree per Second
rpm ↔ °/s
Unit guides
3 unitsDetailed guide to this category
Angular velocity measures how fast an object rotates or revolves, expressed as an angle per unit of time.
RPM (revolutions per minute) is the most common practical unit, while radians per second is the SI derived unit used in engineering calculations.
- Physical quantity
- Angular velocity
- SI unit
- Radian per second
- Common practical unit
- RPM
- Typical use
- Engine speed and rotational motion
What is angular velocity?
Angular velocity describes the rate of rotation of an object around an axis.
It is used for engine and motor speeds, turbines, hard drives and rotational dynamics.
RPM, radians and degrees per second
RPM expresses rotation as full revolutions per minute, a practical unit for engines and machinery.
Radians per second is the SI unit preferred in physics and engineering formulas.
RPM, radians per second and degrees per second
RPM counts complete rotations over a minute and is common for motors and engines. Radians per second is the SI-form unit used in mechanics, while degrees per second is useful for orientation and motion displays.
Convert the time basis as well as the angle basis: one revolution per minute is not the same magnitude as one revolution per second.
Unit comparison table
| Unit | Symbol | SI equivalent | System | Common use |
|---|---|---|---|---|
| Revolutions per Minute | rpm | ≈ 0.10472 rad/s | Rotational speed unit | Motors, engines and machinery |
| Radian per Second | rad/s | SI reference unit | SI | Mechanics and control systems |
| Degree per Second | °/s | ≈ 0.01745 rad/s | Angular-rate unit | Sensors and orientation systems |
Units
| Unit | Symbol | Information |
|---|---|---|
| Revolutions per Minute (RPM) | rpm | View unit guide |
| Radian per Second | rad/s | View unit guide |
| Degree per Second | °/s | View unit guide |