Tool category

Performance calculators

12 specialised performance calculators with instant, formula-based results.

Horsepower & Torque Converter

Convert torque to power at a given rpm using hp = torque x rpm / 5252.

Estimate quarter-mile time and trap speed from weight and power using the Wallace formulas.

Check whether trailer weight stays within your vehicle's safe limits.

Estimate acceleration time from power, weight and drivetrain.

Compute final drive ratio from ring and pinion teeth and its effect on rpm.

Compare cars by power per tonne and per kg with an acceleration estimate.

Correct measured power for temperature, pressure and humidity (SAE style).

Compute required pump flow (L/h) for a target power and fuel type.

Estimate intercooler core volume and expected cooling efficiency.

Check whether a clutch can hold engine torque after modifications.

Compare speedometer reading with GPS speed to find the error and odometer drift.

Find engine rpm after an upshift and whether it stays in the torque band.