Performance Calculators
Convert power units, calculate power-to-weight ratios, quarter mile times, and gear ratios.
BHP to KW Converter
Convert between brake horsepower and kilowatts.
Torque Converter
Convert torque between Nm, lb-ft, and kgf-m.
0-60 Calculator
Estimate 0-60 mph time from power, weight, and drivetrain.
Power to Weight Calculator
Calculate your car's power-to-weight ratio in BHP per tonne.
Quarter Mile Calculator
Estimate quarter mile time and trap speed from power and weight.
Top Speed Calculator
Estimate theoretical top speed from power, drag coefficient, and frontal area.
Engine CC Calculator
Calculate engine displacement in cc from bore, stroke, and cylinder count.
Compression Ratio Calculator
Calculate engine compression ratio from chamber and swept volumes.
Gear Ratio Calculator
Calculate overall gear ratios and road speed at any RPM.
Turbo Boost Calculator
Estimate power gains from turbo boost pressure.
10 free calculators in Performance
Car Performance Calculators for Enthusiasts
Whether you are comparing cars, planning modifications, or simply curious about the numbers, our performance calculators give you the tools to understand what makes a car fast. From simple unit conversions to complex acceleration estimates, every tool uses proven engineering formulas.
The BHP to kW converter handles the most common power unit confusion, while the torque converter switches between Nm and ft-lb. For comparing cars fairly, the power-to-weight calculator shows which car has the performance advantage regardless of size. The 0-60 and quarter mile calculators use the Sargent formula to estimate real-world acceleration times.
Engine builders and tuners will find the engine CC calculator and compression ratio calculator essential for planning builds. The gear ratio calculator helps you understand how final drive, gearbox ratios, and tyre size combine to determine speed at any RPM, which is crucial for choosing the right setup for road or track use.