Horsepower Calculator
Calculate engine horsepower from torque and RPM or estimate HP from quarter mile time and vehicle weight. Convert between HP, kW, and metric horsepower.
Inputs
lb-ft
RPM
Results
Horsepower (SAE)
366.5 HP
Kilowatts273.3 kW
Metric Horsepower371.6 PS
BTU per Hour932,602
Torque Estimate350 lb-ft
Formula UsedHP = (Torque × RPM) / 5252
How to Use This Calculator
- Choose a Calculation Method: From Torque & RPM, or From Quarter Mile time.
- For the torque method, enter Torque in lb-ft and Engine RPM at peak power.
- For the quarter-mile method, enter Vehicle Weight in lbs and Quarter Mile Time in seconds.
- Review the Horsepower (SAE), Kilowatts, and Metric Horsepower (PS) outputs.
- Use the Formula Used field to understand exactly which equation was applied.
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