Wolfram|Alpha has automobile-related calculators. Solve problems related to the anti‐knock index, fuel cost, fuel used, miles per gallon equivalent (MPGe), the cetane index by a four variable equation, coolant system performance, differential gear ratio, electric vehicle range, gas to oil mixture ratio, indicated horsepower calculations, Peukert's law, vehicle speed estimate based on skid marks, stopping distance, tire deflection, tire wear and tear, carbon dioxide emissions from driving, and metric or standard tire sizes.
