Enter the total engine output in kilo-watts (kW) into the calculator and select the drive-train to determine the wheel KW. This calculator can convert between both engine and wheel kilo-watts.
- Wheel Horsepower Calculator
- Wheel Torque Calculator
- WHP to HP Calculator
- Drivetrain Loss Calculator
- RWKW to HP Calculator
Engine KW to Wheel KW Formula
The following formula is used to calculate the KW at the wheel given the engine KW.
W(kW) = E(kW) - E(kw)*DTL
- Where W(kW) is the wheel kilo-watts (kW)
- E(kw) is the engine kilo-watts (kW)
- DTL is the drive train loss
- 10% for front wheel drive
- 15% for rear-wheel drive
- 20% for all-wheel drive
To calculate the wheel kW, subtract the drivetrain loss from the engine kW.
What is Wheel KW?
Wheel KW is a measure of the total power delivered to the wheels of an electric vehicle where the engine is outputting a certain power in kilo-watts.
How to calculate wheel KW?
The following example problem outlines how to calculate wheel kW from engine kW.
First, determine the power output of the engine in kilo-watts. For this example, the engine outputs 1000 kW.
Next, determine the losses by the drivetrain. In this example, the electric vehicle is all wheel drive and has a 20% loss.
Finally, calculate the wheel kW using the formula above:
W(kW) = E(kW) – E(kw)*DTL
W(kW) = 1000 – 1000*.20
W(kW) = 800 kW