SCIENCE & TECHNOLOGY

Engine Horsepower Estimate

Engine Horsepower Estimate: Empirical drag-racing estimate.

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Engine Horsepower Estimate for United States

Country or area

US · 12,345.67US customary measurementsRoad distance: miles

United States display and unit preferences. The stated calculation method is used. Review the labeled units before entering your values.

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Your details

Quarter-mile model

Total vehicle and driver mass (lb)

Enter total vehicle and driver mass (lb). The calculation converts these units internally.

Quarter-mile elapsed time (seconds)

Quarter-mile trap speed (km/h)

Results update instantly as you change the inputs.

Estimated horsepower

238.193

United States · calculated from your inputs

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How this result was calculated

Elapsed-time model: HP=weight(lb)/(ET/5.825)³. Trap-speed model: HP=weight(lb)×(speed(mph)/234)³.
Country setup: United States. Displayed measurements are converted to the formula's base units internally.

Assumption: Empirical drag-racing estimate. Traction, drivetrain losses, weather and launch affect results; this is not a dynamometer measurement. United States display and unit preferences. The stated calculation method is used. Review the labeled units before entering your values.

Calculation version 1.0.0 · Support state: generic

Formula and method

Elapsed-time model: HP=weight(lb)/(ET/5.825)³. Trap-speed model: HP=weight(lb)×(speed(mph)/234)³.

This calculation uses the values you enter. It runs in your browser and does not request a location or account.

Worked example

The model uses total vehicle-plus-driver mass and a quarter-mile run.

Questions people ask

Which method does this tool use?

Elapsed-time model: HP=weight(lb)/(ET/5.825)³. Trap-speed model: HP=weight(lb)×(speed(mph)/234)³.

What should I check before using the result?

Empirical drag-racing estimate. Traction, drivetrain losses, weather and launch affect results; this is not a dynamometer measurement.