Fuel economy, tires, EV charging and more.
Free car tools: fuel cost, MPG and L per 100km converters, tire size, gear ratio, lease vs buy, depreciation and EV charging calculators. Fast, client-side, no sign-up. All 23 tools below are free, run entirely in your browser, and need no sign-up.
Calculate the fuel cost of any trip from distance, fuel economy, and gas price. Works in MPG or L/100km with instant results.
Calculate your real miles per gallon from miles driven and gallons used. See the L/100km equivalent and cost per mile too.
Calculate fuel consumption in liters per 100 km from distance and liters used. See the km per liter and MPG equivalent too.
Convert miles per gallon to liters per 100 km and back. Supports both US and Imperial (UK) gallons with the exact formula.
Convert US MPG to UK Imperial MPG and back. Imperial gallons are larger, so the same car reads higher in UK MPG figures.
Plan a road trip budget: enter distance, fuel economy, price, and passengers to see total fuel cost and cost per person.
Calculate the true cost per mile of driving from fuel, insurance, maintenance, and depreciation over your yearly mileage.
Compare two cars by fuel economy and see the yearly and 5 year fuel savings you get from switching to the more efficient one.
Calculate how far you can drive on a full tank from your tank size and MPG, plus a safe range that keeps a fuel reserve in the tank.
Compare leasing and buying a car over the same period. See total cost, monthly payment, and the equity you keep by buying.
Estimate how much value a car loses each year. See year by year value from purchase price and an annual depreciation rate.
Read a tire size code like 225/45R17 and get the overall diameter, sidewall height, circumference, and revolutions per mile.
Compare two tire sizes and see the difference in diameter, sidewall, and how much your speedometer reads off with the new size.
Calculate speedometer error after a tire size change. Enter old and new tire diameters to see your true speed at any indicated reading.
Calculate final drive gear ratio from ring and pinion teeth, plus engine RPM at a given speed for your tire size and gearing.
Compare wheel offsets and see how far a new wheel moves in or out. Enter width and offset to find the change at the fender and hub.
Calculate engine displacement from bore, stroke, and cylinder count. Get the result in cc, liters, and cubic inches at once.
Solve horsepower, torque, or RPM when you know the other two. Uses the classic HP equals torque times RPM over 5252 formula.
Estimate a car 0 to 60 mph time from horsepower and weight using a power to weight model. See the power to weight ratio too.
Calculate the cost to charge an electric car from battery size, charge level, charging losses, and your electricity price per kWh.
Estimate how long it takes to charge an electric car from battery size, charger power, and the charge percentage you need.
Compare the fuel cost of an electric car and a gas car per mile and per year, and see how much you would save by going electric.
Estimate the yearly cost of oil changes and the cost per mile from your interval, mileage, oil, filter, and labor prices.
Yes. Every automotive tool on yourhack.ai is completely free, with no sign-up and no usage limits.
Yes. They run in any modern web browser on phone, tablet or desktop. There is nothing to install.
Yes. These tools run entirely in your browser, so nothing you enter is uploaded to a server.
There are currently 23 free automotive tools here, and we add more regularly.