Performance & Engineering
20 calculatorsThe physics of how a car accelerates, holds speed and uses its power. These calculators estimate 0-60 and quarter-mile times, power-to-weight ratio, aerodynamic drag, rolling resistance, gearing and top speed from first principles. They are built for enthusiasts and students who want to understand the engineering behind the numbers, not just read a spec sheet.
All Performance & Engineering calculators
- 0-100 km/h CalculatorEstimate sprint time from power, weight and drivetrain using quarter-mile physics.
- 0-60 mph from Power-to-WeightEstimate 0–60 mph time from engine horsepower and vehicle weight using the Hales empirical formula.
- Aerodynamic Drag at SpeedCalculate aerodynamic drag force and power required at any speed using frontal area and Cd.
- Air Conditioning Fuel CostCalculate the extra fuel cost of running your car's air conditioning over a given period.
- Boost Pressure to Power EstimatorEstimate engine power output after adding boost pressure with intercooler efficiency factored in.
- Braking Distance CalculatorCalculate total stopping distance from speed, road friction and driver reaction time.
- Cornering G-Force CalculatorCalculate lateral g-force from speed and corner radius using centripetal acceleration physics.
- Gear Ratio CalculatorCalculate overall gear ratio from transmission gear teeth and final-drive ratio.
- Headwind Fuel Economy ImpactCalculate how headwind speed reduces your vehicle's fuel economy at any speed and baseline MPG.
- Power-to-Weight Ratio CalculatorCalculate hp/tonne and kW/tonne from horsepower and vehicle weight in seconds.
- Quarter Mile Time EstimatorEstimate quarter-mile ET and trap speed from horsepower and weight using the Huntington formula.
- Rolling Resistance ImpactCalculate rolling-resistance force, power demand, and energy loss from tire-road friction.
- Roof Box Drag PenaltyCalculate the extra fuel cost from a roof box over a given distance based on aerodynamic drag penalty.
- RPM at Given Speed CalculatorCalculate engine RPM at any road speed from gear ratio, final drive, and tyre circumference.
- Specific Output Calculator (hp/L)Calculate engine specific output (horsepower per litre) from power and displacement.
- Stopping Distance (incl Reaction)Calculate total stopping distance including reaction time and braking distance in metres.
- Top Speed Estimator (Drag-Limited)Calculate theoretical top speed from power, drag coefficient, and frontal area.
- Towing Fuel Penalty CalculatorCalculate the extra fuel cost and economy penalty when towing a trailer over any distance.
- Tyre Pressure Effect on EconomyEstimate how under-inflated tyres reduce fuel economy based on pressure deficit and loss rate.
- Tyre Size Effect on SpeedoCalculate your true speed when fitting different-diameter tyres to your car.