Authoritative definitions of the International System of Units and SI prefixes.
Unit conversion
Revolutions per minute to Kilohertz Converter
1 rpm ≈ 0.0000166666666667 kHz. Enter a value to convert rpm to kHz, then use the formula and table below. Displayed digits may be rounded.
FrequencyInstant result
Decimals
Formula result = input × 0.016666666666666666 ÷ 1000. 1 rpm ≈ 1.66667e-5 kHz
Nonzero results too small for the selected decimal places use scientific notation.
Nonzero results too small for the selected decimal places use scientific notation.
Common examples
One value, several units
Hertz0.0167 Hz
Kilohertz1.66667e-5 kHz
Megahertz1.66667e-8 MHz
Gigahertz1.66667e-11 GHz
Conversion table
| rpm | kHz |
|---|---|
| 1 rpm | 1.66667e-5 kHz |
| 2 rpm | 3.33333e-5 kHz |
| 5 rpm | 0.0001 kHz |
| 10 rpm | 0.0002 kHz |
| 25 rpm | 0.0004 kHz |
| 50 rpm | 0.0008 kHz |
| 100 rpm | 0.0017 kHz |
Conversion chart
1 rpm1.66667e-5 kHz
5 rpm0.0001 kHz
10 rpm0.0002 kHz
25 rpm0.0004 kHz
50 rpm0.0008 kHz
Worked example
1 rpm ≈ 0.0000166666666667 kHz. Apply the selected conversion formula to other input values.
Unit definition
Revolutions per minute (rpm) One revolutions per minute equals 0.0166666666667 hertz.
Unit history
Revolutions per minute is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert rpm to hertz.
3. Convert the base value to kHz and apply your display precision.
Understand the result before using it
Revolutions per minute to Kilohertz converts a value measured in Revolutions per minute (rpm) into the equivalent value in Kilohertz (kHz). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 0.016666666666666666 ÷ 1000
Assumptions
- Revolutions per minute and Kilohertz represent the same frequency quantity.
- The input is expressed in rpm; the output is expressed in kHz.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 rpm ≈ 0.0000166666666667 kHz. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a rpm measurement in a document that expects kHz.
- Compare a revolutions per minute value with a value reported in kilohertz.
- Check the rpm to kHz arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Do not confuse rpm with another unit that has a similar name or symbol.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert Revolutions per minute to Kilohertz?
result = input × 0.016666666666666666 ÷ 1000. Input is in rpm; result is in kHz. 1 rpm ≈ 0.0000166666666667 kHz. The displayed digits may be rounded.
What is 1 rpm in kHz?
1 rpm ≈ 0.0000166666666667 kHz. The displayed digits may be rounded.
Can I reverse the rpm to kHz conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts kHz back to rpm.
Is the Revolutions per minute to Kilohertz result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.