Automotive Tools
Free interactive automotive calculators and DIY tools for vehicle owners, mechanics, and car enthusiasts. Compare fuel efficiency, calculate gear ratios, estimate maintenance costs, and optimize vehicle performance with accurate, user-friendly automotive tools. Save money on repairs and make informed decisions about your car, truck, or motorcycle.
Gear Ratio & Top Speed Calculator
Precisely calculate vehicle top speed, engine RPM at any speed, and optimal gear ratios based on transmission gearing, final drive ratio, and tire dimensions. Essential for automotive enthusiasts, racers, and mechanics optimizing drivetrain setups for performance, fuel economy, or towing.
Differential (Ring & Pinion) Ratio Calculator
Precisely calculate differential gear ratios from ring and pinion tooth counts for optimal vehicle performance. Essential for mechanics, off-road enthusiasts, and performance tuners planning gear swaps to improve acceleration, towing capacity, or fuel economy in any vehicle.
HP & Torque Converter
Instantly convert between horsepower and torque at any engine RPM with precision using our advanced calculator. Essential for automotive enthusiasts, mechanics, engineers, and tuners analyzing engine performance, comparing modifications, or verifying dynamometer results across multiple measurement standards.
Car Tire Pressure Calculator
Calculate the optimal tire pressure for your vehicle based on weight, load distribution, tire specifications, and driving conditions. Improve fuel efficiency, tire longevity, handling performance, and safety with accurate PSI recommendations for any car, truck, or SUV.
Engine Displacement Calculator
Accurately calculate engine displacement in cubic centimeters (cc) or liters using bore diameter, stroke length, and cylinder count. Essential for automotive enthusiasts, mechanics, and engine builders planning modifications, rebuilds, or understanding performance specifications.
Fuel Efficiency Converter & Cost Estimator
Convert between all major fuel efficiency measurements (MPG, L/100km, km/L) and calculate precise trip costs based on fuel prices, distance, and vehicle efficiency. Perfect for comparing vehicles, planning road trips, budgeting travel expenses, and understanding international fuel economy standards.