⚙ Automotive Guide

Automotive Costs: Loans, Fuel Economy & EV Charging Guide

Understanding vehicle ownership costs, miles per gallon, depreciation, and charging.

9 free calculatorsFormula includedWorked example

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📚 Overview

Vehicles are often the second-largest purchase households make. Calculating true cost of ownership—including financing interest, depreciation curves, fuel efficiency, and electric vehicle charging rates—helps drivers make financially sound automotive choices.

📐 Miles Per Gallon (MPG) & EV Charging Duration

MPG = Miles Driven / Gallons Consumed and Charge Time(h) = Battery(kWh) / Charger Power(kW)

Fuel cost per mile = Gas Price / MPG. EV cost per mile = (Electricity Rate $/kWh × Consumption kWh/100mi) / 100.

🔢 Worked Example

Scenario: A driver travels 360 miles on a 12-gallon tank of fuel priced at $3.60 per gallon.

Distance: 360 miles
Fuel: 12 gallons
Price: $3.60/gallon

MPG = 360 / 12 = 30 MPG
Cost per mile = $3.60 / 30 = $0.12 per mile
Annual fuel cost (15,000 miles) = 15,000 × $0.12 = $1,800

The vehicle achieves 30 MPG at an operating fuel cost of $0.12 per mile ($1,800 annually).

💡 Pro Tips

Depreciation is the largest hidden vehicle expense, accounting for roughly 40% of a new car's value over its first three years.
Properly inflated tires improve fuel economy by up to 3% while extending tread lifespan.
Level 2 EV home charging (240V / 32–48A) provides 25 to 35 miles of range per hour of charge time.
Use our auto loan calculator to understand the true impact of dealer interest rate markups.

🧮 Automotive Calculators (9)

Put the formulas above into practice with these free tools:

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