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Revolution/min to Hertz Converter

Enter the value that you want to convert revolution/min (rpm) to hertz (Hz) or hertz to revolution/min.Also written as RPM to HZ conversion.

1 revolution/min = 0.0166667 hertz

Formula: hertz = revolution/min value × 0.0166667

RPM to HZ — revolution/min to hertz

rpm
0.16667Hz

10 revolution/min = 0.16667 hertz

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Converting Revolution/min to Hertz

Understanding the Revolution/min

Revolution/min (rpm) is a unit of frequency measurement. 1 revolution/min is equal to 0.0166667 hertz.

What is Hertz?

Hertz (Hz) is a unit of frequency measurement. 1 hertz is equal to 59.9999999 revolution/min.

Frequency Conversion Applications

Frequency units span from hertz (cycles per second) through kilohertz (AM radio), megahertz (FM radio, processors), to gigahertz (Wi-Fi, 5G, microprocessors) and terahertz (scientific imaging). RPM to hertz conversion connects mechanical rotation to electrical frequency in generators and motors. Musicians convert between frequency (Hz) and musical pitch.

revolution/min to hertz metric conversion table

0.01 rpm=0.00017 Hz
0.1 rpm=0.00167 Hz
1 rpm=0.01667 Hz
2 rpm=0.03333 Hz
3 rpm=0.05000 Hz
4 rpm=0.06667 Hz
5 rpm=0.08333 Hz
6 rpm=0.10000 Hz
7 rpm=0.11667 Hz
8 rpm=0.13333 Hz
9 rpm=0.15000 Hz
10 rpm=0.16667 Hz
11 rpm=0.18333 Hz
12 rpm=0.20000 Hz
13 rpm=0.21667 Hz
14 rpm=0.23333 Hz
15 rpm=0.25000 Hz
16 rpm=0.26667 Hz
17 rpm=0.28333 Hz
18 rpm=0.30000 Hz
19 rpm=0.31667 Hz
20 rpm=0.33333 Hz
30 rpm=0.50000 Hz
40 rpm=0.66667 Hz
50 rpm=0.83333 Hz
60 rpm=1.00000 Hz
70 rpm=1.16667 Hz
80 rpm=1.33333 Hz
90 rpm=1.50000 Hz
100 rpm=1.66667 Hz
200 rpm=3.33333 Hz
300 rpm=5.00000 Hz
400 rpm=6.66667 Hz
500 rpm=8.33333 Hz
600 rpm=10.00000 Hz
700 rpm=11.66667 Hz
800 rpm=13.33333 Hz
900 rpm=15.00000 Hz
1000 rpm=16.66667 Hz

How to Convert RPM to HZ (Revolution/min to Hertz)?

We can convert revolution/min to hertz by using an example.

Example:

Convert 20 Revolution/min to Hertz?

We know 1 Revolution/min = 0.0166667 hertz; 1 Hertz = 59.9999999 revolution/min.

20 revolution/min = ___Hz

20 × 0.0166667 = 0.33333 Hz (we know 1 revolution/min = 0.0166667 hertz)

Answer:

20 revolution/min = 0.33333 hertz

RPM to Hz: Converting Rotational Speed to Frequency

Revolutions per minute (RPM) and Hertz (Hz) both measure cyclical motion, but on different time scales. Since 1 revolution = 1 cycle, and there are 60 seconds in a minute, the conversion is: Hz = RPM ÷ 60. This is fundamental in motor control, vibration analysis, and mechanical engineering.

  1. Start with the rotational speed in RPM.
  2. Divide by 60 (seconds per minute).
  3. The result is the frequency in Hz.
  4. Example: 3,600 RPM ÷ 60 = 60 Hz.
💡 Tip: A motor running at 60 Hz mains frequency (3,600 RPM for 2-pole) demonstrates the direct RPM-Hz-pole relationship: RPM = 120 × Hz ÷ poles.

RPM to Hz Quick Reference

Common rotational speeds in machinery and their Hz equivalents:

Revolution/minHertz
60 RPM1 Hz
300 RPM5 Hz
1,200 RPM20 Hz
1,800 RPM30 Hz
3,600 RPM60 Hz
7,200 RPM120 Hz
10,000 RPM166.7 Hz
30,000 RPM500 Hz

Solved Examples: RPM to Hz

Question 1: A car engine idles at 750 RPM. What is the rotational frequency in Hz?

Solution:

Hz = RPM ÷ 60

= 750 ÷ 60

= 12.5 Hz

Answer: 750 RPM = 12.5 Hz — the engine crankshaft completes 12.5 revolutions per second.

Question 2: A centrifuge spins at 15,000 RPM. Convert to Hz.

Solution:

Hz = RPM ÷ 60

= 15,000 ÷ 60

= 250 Hz

Answer: 15,000 RPM = 250 Hz — the sample experiences 250 revolutions per second.

Question 3: A ceiling fan on high speed rotates at 180 RPM. Express in Hz.

Solution:

Hz = RPM ÷ 60

= 180 ÷ 60

= 3 Hz

Answer: 180 RPM = 3 Hz — three complete blade rotations per second.

Practice: RPM to Hz

Try solving these on your own to test your understanding:

  1. Convert 120 RPM to Hz. (Answer: 2 Hz)
  2. A drill press runs at 2,400 RPM. What is this in Hz? (Answer: 40 Hz)
  3. Convert 5,400 RPM (laptop HDD) to Hz. (Answer: 90 Hz)
  4. A blender motor spins at 24,000 RPM. Express in Hz. (Answer: 400 Hz)
  5. Convert 33⅓ RPM (vinyl record) to Hz. (Answer: 0.556 Hz)

Motor Speed and Power Line Frequency

AC induction motors are intimately tied to power line frequency. In 60 Hz countries (US, Canada, Japan-east), a 2-pole motor runs at 3,600 RPM synchronous speed (60 Hz × 60 ÷ 1 pole pair). A 4-pole motor runs at 1,800 RPM (30 Hz rotational). In 50 Hz countries (Europe, Asia), these become 3,000 and 1,500 RPM. Variable frequency drives (VFDs) control motor speed by varying the Hz of the power supply.

Vibration Analysis: RPM to Hz for Diagnostics

Vibration analysts convert shaft RPM to Hz to identify fault frequencies. A shaft at 1,800 RPM has a fundamental frequency of 30 Hz. Bearing defects, gear mesh, and imbalance all produce vibrations at specific multiples of this fundamental. Accelerometers measure in Hz, so converting the shaft RPM (÷ 60) is the first step in any vibration diagnosis — allowing you to match spectral peaks to physical causes.

Key Takeaways

  • 1 RPM = 1/60 Hz ≈ 0.01667 Hz.
  • Divide RPM by 60 to get Hz (rotational frequency).
  • A 2-pole motor on 60 Hz power runs at 3,600 RPM (60 Hz rotational).
  • Vibration analysis requires converting shaft RPM to Hz for spectrum matching.
  • Variable frequency drives control motor RPM by changing supply Hz.

Revolution/min to Hertz Conversion Formula

hertz = revolution/min × 0.0166667

1 revolution/min = 0.0166667 hertz

1 hertz = 59.9999999 revolution/min

Reverse: revolution/min = hertz × 59.9999999

Frequently Asked Questions

How many hertz are in 1 revolution/min?

There are 0.0166667 hertz in 1 revolution/min. To convert revolution/min to hertz, multiply the value by 0.0166667.

How do I convert revolution/min to hertz?

Multiply your revolution/min value by 0.0166667 to get the equivalent in hertz. For example, 5 revolution/min = 5 × 0.0166667 = 0.08333 hertz.

How do I convert hertz to revolution/min?

Multiply your hertz value by 59.9999999 to get the equivalent in revolution/min. Alternatively, divide by 0.0166667.

What is 10 revolution/min in hertz?

10 revolution/min is equal to 0.16667 hertz.

What is 100 revolution/min in hertz?

100 revolution/min is equal to 1.66667 hertz.