Free Tools for Drivers
Small, free tools for people who drive in the United States. They run in your browser and need no account.
Independent educational site · not affiliated with any government agency or DMV
Quick converters
One page for each conversion people look up most.
MPH to KM/H converter
Convert miles per hour to kilometers per hour (and back) instantly, with a table of common US road speeds.
OpenMiles to kilometers converter
Convert miles to kilometers (and back) instantly, with a table for common trip distances.
OpenMPG to L/100 km converter
Convert miles per gallon (US or UK) to liters per 100 km and km per liter, with a table of common fuel economy figures.
OpenGallons to liters converter
Convert US gallons to liters (and back) instantly, with a table for common fuel tank amounts.
OpenFahrenheit to Celsius converter
Convert degrees Fahrenheit to Celsius (and back) instantly, with a table of everyday temperatures.
OpenPSI to bar converter for tire pressure
Convert psi to bar and kPa (and back) for tire pressure, with a table of common values.
OpenMoving to the US? Practice the driving test in your language
Free practice questions for the written driver’s license test, by state, with explanations.