11 free tools
Automotive calculators
Estimate vehicle costs, efficiency, tires, gearing, and performance. Every tool includes its formula, an example, and instant private results.
Fuel Cost Calculator
Estimate trip fuel usage, total fuel cost, and cost per traveler.
Open calculatorMPG Calculator
Calculate miles per gallon from distance driven and fuel used.
Open calculatorFuel Economy Calculator
Compare fuel economy across trips, units, and driving patterns.
Open calculatorEV Charging Cost Calculator
Estimate electric vehicle charging cost by battery size and rates.
Open calculatorCar Loan Calculator
Estimate monthly car loan payments from price, rate, and term.
Open calculatorLease Calculator
Estimate monthly auto lease payments from cap cost and residual value.
Open calculatorTire Size Calculator
Compare tire dimensions and overall diameter across size codes.
Open calculatorGear Ratio Calculator
Calculate gear ratio from driven and drive gear tooth counts.
Open calculatorSpeedometer Calculator
Correct speedometer error after changing tire diameter.
Open calculatorEngine Displacement Calculator
Calculate engine displacement from bore, stroke, and cylinders.
Open calculatorTowing Capacity Calculator
Estimate safe towing capacity from GVWR, curb weight, and cargo.
Open calculatorAbout our automotive calculators
CalculatorDepot tools are designed for quick estimates and learning. Inputs stay in your browser, and each page describes the equation behind its result. Check important decisions with a qualified professional when individual circumstances, regulations, or fees matter.