ZovaTool

Engine Horsepower Calculator

Flywheel HP
294.1
Loss HP
44.1
Loss %
15%

All Drivetrains for 250 WHP

FWD277.8 flywheel HP (10% loss)
RWD294.1 flywheel HP (15% loss)
AWD312.5 flywheel HP (20% loss)

How to use the Engine Horsepower Calculator

  1. Enter wheel horsepower (from a chassis dyno).
  2. Pick drivetrain: FWD, RWD or AWD.
  3. Read estimated flywheel HP and drivetrain loss.
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WHP vs crank HP

Chassis dynos measure power at the wheels. Manufacturers quote at the crank, which is always higher.

Typical losses: FWD ~10%, RWD ~15%, AWD ~20%. Loss is mostly heat from gears and bearings.