Convert Hertz (rotational) to Revolutions per minute
Instantly convert Hertz (rotational) (Hz) to Revolutions per minute (RPM) with our free online calculator.
Formula: Hz to RPM — multiply by 60
Reference Table
| Hertz (rotational) (Hz) | Revolutions per minute (RPM) |
|---|---|
| 1 | 60 |
| 5 | 300 |
| 10 | 600 |
| 25 | 1500 |
| 50 | 3000 |
| 100 | 6000 |
How to Convert Hertz (rotational) to Revolutions per minute
Formula
To convert Hertz (rotational) (Hz) to Revolutions per minute (RPM): multiply by 60
Step-by-Step
- Start with your value in Hertz (rotational) (Hz).
- Multiply by 60 to perform the conversion.
- The result is your value expressed in Revolutions per minute (RPM).
Conversion Factor
1 Hz = 60 RPM
Reverse Factor
1 RPM = 0.0166667 Hz
Worked Example
Convert 25 Hertz (rotational) to Revolutions per minute: 25 Hz = 1500 RPM
About Hertz (rotational) (Hz)
Rotational frequency expressed in cycles per second — dimensionally identical to rev/s (1 Hz = 1 rev/s = 60 RPM = 2π rad/s) but more common in physics, vibration analysis, and rotor-dynamics contexts where the frequency-domain interpretation matters. Used in: rotor-dynamics critical-speed studies per API 684 and ISO 21940 (the first-bending-mode critical speed of a 200 MW steam turbine rotor is typically 25-35 Hz, well separated from the 50/60 Hz grid synchronous speed at 50/60 Hz exactly), NDT (Non-Destructive Testing) vibration surveys per ISO 10816, FFT spectral analysis of rotating-machinery vibration signatures (the 1× = running speed peak, 2× = misalignment, 3-10× = blade-pass or gear-mesh frequencies depending on machine type), and balancing-machine output per ISO 1940 / ISO 21940-11. NOT to be confused with Hz as an electrical / temporal / oscillatory frequency (though they share the same underlying '1/s' dimension and are sometimes deliberately conflated in spectral analysis).
About Revolutions per minute (RPM)
A rotational-speed unit counting complete 360° turns per minute (1 RPM = 2π/60 rad/s ≈ 0.1047 rad/s = 6°/s). RPM is the dominant everyday rotational-speed unit on tachometers, motor nameplates, and machinery specifications. Reference values: automotive engine idle 700-900 RPM, redline 6,000-9,000 RPM for naturally-aspirated gasoline cars (Honda S2000 F20C 9,000 RPM, Lexus LFA 1LR-GUE 9,500 RPM, F1 V10 engines pre-2014 18,000-20,000 RPM); turbomachinery (steam turbines 3,000 RPM for 50 Hz grid-synchronous / 3,600 RPM for 60 Hz grid; modern aeroderivative gas-turbine 3,600-9,500 RPM depending on shaft); machine tools (typical CNC milling spindle 8,000-24,000 RPM, high-speed machining 30,000-60,000 RPM); hard-disk-drive spindles 5,400 / 7,200 / 10,000 / 15,000 RPM (the last in enterprise SAS drives); ceiling fans 200-300 RPM; washing-machine spin cycles 800-1,600 RPM. Converting RPM to rad/s (multiply by π/30 ≈ 0.1047) is routine for rotor-dynamic analysis and FEA.
Quick Facts
- 1 Hertz (rotational) equals 60 Revolutions per minute
- 1 Revolutions per minute equals 0.0166667 Hertz (rotational)
- Hertz (rotational) is a unit of angular velocity
- Revolutions per minute is a unit of angular velocity
- This conversion is commonly used in motor specifications, rotating machinery, and mechanical design
- The Hertz (rotational) belongs to the metric system
Common Hertz (rotational) to Revolutions per minute Conversions
| Hertz (rotational) (Hz) | Revolutions per minute (RPM) |
|---|---|
| 0.01 | 0.6 |
| 0.1 | 6 |
| 0.25 | 15 |
| 0.5 | 30 |
| 1 | 60 |
| 2 | 120 |
| 3 | 180 |
| 5 | 300 |
| 10 | 600 |
| 15 | 900 |
| 20 | 1200 |
| 25 | 1500 |
| 50 | 3000 |
| 75 | 4500 |
| 100 | 6000 |
| 250 | 15000 |
| 500 | 30000 |
| 1000 | 60000 |
| 5000 | 300000 |
| 10000 | 600000 |
Understanding Hertz (rotational)
The Hertz (rotational) (symbol: Hz) is a unit of angular velocity. Rotational frequency expressed in cycles per second — dimensionally identical to rev/s (1 Hz = 1 rev/s = 60 RPM = 2π rad/s) but more common in physics, vibration analysis, and rotor-dynamics contexts where the frequency-domain interpretation matters. Used in: rotor-dynamics critical-speed studies per API 684 and ISO 21940 (the first-bending-mode critical speed of a 200 MW steam turbine rotor is typically 25-35 Hz, well separated from the 50/60 Hz grid synchronous speed at 50/60 Hz exactly), NDT (Non-Destructive Testing) vibration surveys per ISO 10816, FFT spectral analysis of rotating-machinery vibration signatures (the 1× = running speed peak, 2× = misalignment, 3-10× = blade-pass or gear-mesh frequencies depending on machine type), and balancing-machine output per ISO 1940 / ISO 21940-11. NOT to be confused with Hz as an electrical / temporal / oscillatory frequency (though they share the same underlying '1/s' dimension and are sometimes deliberately conflated in spectral analysis).
It belongs to the metric measurement system.
Hertz (rotational) are commonly used in motor specifications, rotating machinery, and mechanical design.
Understanding Revolutions per minute
The Revolutions per minute (symbol: RPM) is a unit of angular velocity. A rotational-speed unit counting complete 360° turns per minute (1 RPM = 2π/60 rad/s ≈ 0.1047 rad/s = 6°/s). RPM is the dominant everyday rotational-speed unit on tachometers, motor nameplates, and machinery specifications. Reference values: automotive engine idle 700-900 RPM, redline 6,000-9,000 RPM for naturally-aspirated gasoline cars (Honda S2000 F20C 9,000 RPM, Lexus LFA 1LR-GUE 9,500 RPM, F1 V10 engines pre-2014 18,000-20,000 RPM); turbomachinery (steam turbines 3,000 RPM for 50 Hz grid-synchronous / 3,600 RPM for 60 Hz grid; modern aeroderivative gas-turbine 3,600-9,500 RPM depending on shaft); machine tools (typical CNC milling spindle 8,000-24,000 RPM, high-speed machining 30,000-60,000 RPM); hard-disk-drive spindles 5,400 / 7,200 / 10,000 / 15,000 RPM (the last in enterprise SAS drives); ceiling fans 200-300 RPM; washing-machine spin cycles 800-1,600 RPM. Converting RPM to rad/s (multiply by π/30 ≈ 0.1047) is routine for rotor-dynamic analysis and FEA.
Revolutions per minute are commonly used in motor specifications, rotating machinery, and mechanical design.
Why Convert Hertz (rotational) to Revolutions per minute?
Converting between Hertz (rotational) and Revolutions per minute is a frequent requirement for engineers, scientists, and students working with angular velocity values. Different industries and regions favour different unit systems, so having a dependable conversion tool saves time and prevents errors in technical calculations. Whether you are verifying a specification sheet, cross-checking simulation results, or preparing a report for an international audience, accurate angular velocity conversion is essential.
Frequently Asked Questions
How do I convert Hertz (rotational) to Revolutions per minute?
Rotational frequency expressed in cycles per second — dimensionally identical to rev/s (1 Hz = 1 rev/s = 60 RPM = 2π rad/s) but more common in physics, vibration analysis, and rotor-dynamics contexts where the frequency-... To convert Hertz (rotational) to Revolutions per minute, multiply by 60. For example, 25 Hz equals 1500 RPM.
How many Revolutions per minute are in 1 Hertz (rotational)?
There are 60 Revolutions per minute in 1 Hertz (rotational).
How many Hertz (rotational) are in 1 Revolutions per minute?
There are 0.0166667 Hertz (rotational) in 1 Revolutions per minute.
What is the formula for Hertz (rotational) to Revolutions per minute conversion?
The formula is: multiply by 60. This means 1 Hz = 60 RPM.
Is a Hertz (rotational) bigger than a Revolutions per minute?
No. One Hertz (rotational) is smaller than one Revolutions per minute because 1 Hz equals 60 RPM, which is greater than 1.
When do you need to convert between Hertz (rotational) and Revolutions per minute?
A rotational-speed unit counting complete 360° turns per minute (1 RPM = 2π/60 rad/s ≈ 0. Hertz (rotational) and Revolutions per minute are both angular velocity units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.