Enter the Kv rating and the voltage (volts) into the Calculator. The calculator will evaluate the RPM from Kv Rating. 

Kv to RPM Calculator

Enter any 2 values to calculate the missing variable

RPM from Kv Rating Formula

RPM = Kv * V

Variables:

  • RPM is the RPM from Kv Rating (rotations per minute)
  • Kv is the Kv rating
  • V is the voltage (volts)

To calculate RPM from Kv Rating, multiply the Kv rating by the voltage.

Voltage and Motor Kv to RPM Conversion Table (RPM = Kv × Voltage; Kv in RPM/V)
Voltage (V) Kv (RPM/V) RPM
5.010005000
6.0200012000
7.4230017020
9.010009000
11.1220024420
12.0100012000
12.0140016800
14.8100014800
14.8170025160
18.5100018500
18.5150027750
22.2100022200
22.2150033300
22.2190042180
24.0100024000
24.02506000
36.040014400
37.092034040
44.440017760
48.01507200
* RPM rounded to whole numbers. Assumes no-load RPM and Kv expressed in RPM per Volt.

How to Calculate RPM from Kv Rating?

The following steps outline how to calculate the RPM from Kv Rating.

  1. First, determine the Kv rating. 
  2. Next, determine the voltage (volts). 
  3. Next, gather the formula from above = RPM = Kv * V.
  4. Finally, calculate the RPM from Kv Rating.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

Kv rating = 67

voltage (volts) = 80