Auto Calculators

Fuel economy, gas trip cost, and car lease calculators for everyday driving and road trips in the U.S.

6 calculators in this category

Calculate your vehicle's miles per gallon (MPG) from the miles driven and gallons used at your last fill-up.

Find the total fuel cost of any road trip from the trip distance, your MPG, and current gas prices.

Estimate how much a car has lost in value — and what it will be worth after another few years — using typical U.S. depreciation curves.

Decode a P-Metric tire size (like 225/45R17) into overall diameter, sidewall, circumference, and revolutions per mile — and compare two sizes.

Estimate engine horsepower from vehicle weight and quarter-mile trap speed using Huntington's formula — plus rough wheel-to-crank conversion.

Estimate your monthly car lease payment from the MSRP, cap cost, residual value, money factor, and lease term.