Skip to main content Skip to search Skip to main navigation
Go to homepage


Here you have the option of calculating the supplied electrical power, the current and the
resistance of e.g. DC motors.

P = I² x R
Power: P
Current: I
Resistance: R
Please fill all mandatory inputs.

An example:

A direct current motor (or DC motor) has a rated current of 25 amps and a
resistance of 4.8 ohms.
What electrical power results from these specifications?


P=I² x R
P=(25 A)² x 4.8 Ω
P=3 kW

Units of measurement:

Power P=Kilowatt [kW]
Current I=Ampere [A]
Resistance R=Ohm [Ω]

DC motors, B5
to the product page "Direct current motors"