Rpm to Kilohertz
An instant rpm-to-kilohertz converter, with the formula and a reference table below.
| Rpm | Kilohertz |
|---|---|
| 1 rpm | 1.66667e-05 kHz |
| 2 rpm | 3.33333e-05 kHz |
| 3 rpm | 5e-05 kHz |
| 5 rpm | 8.33333e-05 kHz |
| 10 rpm | 0.000167 kHz |
| 25 rpm | 0.000417 kHz |
| 50 rpm | 0.000833 kHz |
| 100 rpm | 0.001667 kHz |
How to use
- Enter a value in the Rpm field.
- The Kilohertz figure appears immediately — no button to press.
- Typing in the Kilohertz field converts back to Rpm the same way.
- Use the reference table for the values that come up most often.
Rpm to Kilohertz formula
To convert rpm to kilohertz, multiply by 1.66666667e-05.
kHz = rpm × 1.66666667e-05
Read in reverse, one kilohertz is exactly 60,000 rpm.
Why this factor: the revolution per minute and the kilohertz are both defined against the hertz, so dividing one definition by the other gives 1.66666667e-05 directly. Both definitions are set out in full below.
To go the other way, divide by 1.66666667e-05 — or use the Kilohertz to Rpm converter, which is the same calculation reversed.
Worked example
Take 60 rpm and multiply by the factor 1.66666667e-05: the result is 0.001 kHz.
60 rpm × 1.66666667e-05 = 0.001 kHz
The converter above does this for any value you type, in either direction.
What is a revolution per minute?
Revolutions per minute measures rotational speed as complete turns each minute.
Definition: One revolution per minute is exactly 1/60 hertz.
Where it is used: Engine and motor speeds, hard drive and fan speeds, and centrifuge settings.
What is a kilohertz?
A kilohertz is 1,000 cycles per second.
Definition: Exactly 1,000 hertz.
Where it is used: AM radio frequencies, audio sample rates (44.1 kHz for CD audio), and ultrasonic ranges.
Rpm vs Kilohertz
The revolution per minute is a specialized unit while the kilohertz is a metric unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many kilohertz are in a revolution per minute?
One revolution per minute equals 1.66666667e-05 kilohertz.
What is the formula to convert rpm to kilohertz?
Multiply the number of rpm by 1.66666667e-05. To reverse it, divide by 1.66666667e-05 instead.
How do I convert kilohertz back to rpm?
Divide by 1.66666667e-05, which is the same as multiplying by 60000.
How many kilohertz are in 10 rpm?
10 rpm works out to 0.000167 kHz.
How is the revolution per minute defined?
One revolution per minute is exactly 1/60 hertz.