Calculate engine kW, wheel kW, or drivetrain loss by entering any two values, with support for horsepower and FWD, RWD, or AWD loss rates.
| Engine hp to Wheel hp | Wheel hp to Engine hp |
|---|---|
| 100 hp = 85 hp | 120 hp = 141.2 hp |
| 150 hp = 127.5 hp | 170 hp = 200 hp |
| 200 hp = 170 hp | 225 hp = 264.7 hp |
| 250 hp = 212.5 hp | 275 hp = 323.5 hp |
| 300 hp = 255 hp | 325 hp = 382.4 hp |
| 350 hp = 297.5 hp | 375 hp = 441.2 hp |
| 400 hp = 340 hp | 425 hp = 500 hp |
| 450 hp = 382.5 hp | 475 hp = 558.8 hp |
| 500 hp = 425 hp | 550 hp = 647.1 hp |
| 600 hp = 510 hp | 650 hp = 764.7 hp |
| 700 hp = 595 hp | 750 hp = 882.4 hp |
| 800 hp = 680 hp | 850 hp = 1,000 hp |
| Formulas: Wheel = Engine × (1 − Loss) and Engine = Wheel ÷ (1 − Loss). (Loss = 0.15.) | |
| Engine hp to Wheel hp | Wheel hp to Engine hp |
|---|---|
| 200 hp = 160 hp | 180 hp = 225 hp |
| 300 hp = 240 hp | 260 hp = 325 hp |
| 400 hp = 320 hp | 340 hp = 425 hp |
| 500 hp = 400 hp | 420 hp = 525 hp |
| 600 hp = 480 hp | 520 hp = 650 hp |
| 700 hp = 560 hp | 620 hp = 775 hp |
| 800 hp = 640 hp | 720 hp = 900 hp |
| 1,000 hp = 800 hp | 900 hp = 1,125 hp |
| Formulas: Wheel = Engine × (1 − Loss) and Engine = Wheel ÷ (1 − Loss). (Loss = 0.20.) | |
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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?
Definition:
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?
Example Problem:
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
