Professional-grade automotive calculators for car enthusiasts, mechanics, and engineers. All calculations are performed with high precision and include both metric and imperial units where applicable. Your data is saved locally for convenience.
Calculate your vehicle's fuel efficiency in MPG or L/100km.
Estimate the fuel cost for your trip based on distance, fuel economy, and fuel price.
Calculate stoichiometric and actual air/fuel ratios for different fuel types.
Convert between horsepower and torque, or calculate horsepower from torque and RPM.
Calculate torque from horsepower and RPM.
Estimate 0-60 mph acceleration time based on vehicle specs.
Estimate quarter mile ET and trap speed based on power-to-weight ratio.
Calculate total engine displacement from bore, stroke, and cylinder count.
Calculate static compression ratio from engine dimensions.
Calculate required fuel injector size based on horsepower and duty cycle.
Calculate airflow requirements and pressure ratios for turbocharger sizing.
Calculate overall gear ratios and theoretical speeds for each gear.
Convert between different tire size formats and calculate dimensions.
Adjust tire pressure for temperature changes and altitude.
Track your oil change intervals and get reminders based on mileage or time.
Determine the correct spark plug heat range based on engine modifications.
Calculate required spring rates for desired ride height and handling characteristics.
Calculate brake bias, pedal ratio, and stopping distances.
Calculate optimal exhaust pipe diameter for your engine's airflow requirements.
Calculate main jet sizing for carburetor tuning based on engine specifications.
