Performance Vehicle
Power to Weight Ratio Calculator
Power-to-weight ratio in hp/tonne and W/kg, with an estimated 0–100 km/h time.
ratio = power ÷ total weight
Also called hp per ton · w/kg calculator
Auto & Travel · 6 calculators
Performance Vehicle Calculators
Power and torque to weight, quarter-mile ET, speed at RPM, wheel horsepower and drivetrain loss, engine displacement.
Performance Vehicle
Acceleration Calculator
Acceleration from the change in velocity over time (a = Δv/t), or solve for Δv or time.
a = Δv / t
Also called acceleration formula · a = dv/dt
Performance Vehicle
Quarter Mile Calculator
Estimated quarter-mile time and trap speed from power and weight, using the classic formulas.
ET = 5.825 × (weight ÷ power)^⅓
Also called et calculator · drag strip calculator
Performance Vehicle
Final Drive Ratio Calculator
Overall drive ratio from gearbox and differential, with road speed at any engine RPM.
overall ratio = gearbox ratio × final dri…
Also called differential ratio · axle ratio calculator
Performance Vehicle
Wheel Horsepower Calculator
Convert between crank and wheel horsepower using the drivetrain loss for your layout.
wheel hp = crank hp × (1 − drivetrain los…
Also called whp to bhp · drivetrain loss calculator
Performance Vehicle
Engine Displacement Calculator
Engine capacity from bore, stroke and cylinder count, in cc, litres and cubic inches.
V = π/4 × bore² × stroke × cylinders
Also called engine size calculator · cc calculator
Key performance vehicle formulas
| Power to Weight Ratio | ratio = power ÷ total weight |
|---|---|
| Acceleration | a = Δv / t |
| Quarter Mile | ET = 5.825 × (weight ÷ power)^⅓ · trap = 234 × (power ÷ weight)^⅓ |
| Final Drive Ratio | overall ratio = gearbox ratio × final drive ratio |
| Wheel Horsepower | wheel hp = crank hp × (1 − drivetrain loss) |
| Engine Displacement | V = π/4 × bore² × stroke × cylinders |