Car calculators
Quick, free tools for the numbers that matter most when you own or buy a car - fuel costs, power, tire sizes, and whether an LPG conversion is worth it. No sign-up, instant results.
Fuel cost & MPG calculator
Work out your real MPG, cost per mile, and yearly fuel spend.
Open calculatorkW to HP calculator
Convert engine power between kilowatts and horsepower, both ways.
Open calculatorTire size calculator
Compare two tire sizes: diameter difference and speedometer error.
Open calculatorLPG payback calculator
See whether a propane/LPG conversion pays off and after how many miles.
Open calculatorSpeed & distance converter
Convert mph to km/h and miles to kilometers, both ways.
Open calculatorCar insurance estimator
Get a rough annual premium range and see what affects your price.
Open calculatorLooking for more than a calculator? Before you buy a used car, check its history and condition with MotoPPI - you'll catch odometer rollback, hidden damage, and faults before you pay. See how to inspect a used car or browse our blog of guides.