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BetterProduct Editorial Team
How to calculate fuel costs, improve your car's efficiency, and reduce transportation expenses.
Fuel costs are one of the largest household expenses for car owners, often second only to the car payment itself. The average American spends over $2,000 per year on gasoline. Understanding how to calculate fuel costs, improve your vehicle's efficiency, and make smarter transportation decisions can save you hundreds of dollars annually.
BetterProduct Editorial Team
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March 2026
Quick everyday calculations and unit checks.
English public edition reviewed against the same source formulas used in maintenance.
Fuel cost for a trip = (Distance ÷ MPG) × Price per gallon. For a 300-mile trip in a car getting 30 MPG with gas at $3.50/gallon: (300 ÷ 30) × $3.50 = $35. Annual fuel cost = (Annual miles ÷ MPG) × Average gas price. If you drive 12,000 miles/year at 28 MPG with gas at $3.50: (12,000 ÷ 28) × $3.50 = $1,500/year.
Driving habits have a major impact on fuel economy. Avoid aggressive acceleration and hard braking — smooth driving can improve MPG by 15–30%. Maintain proper tire pressure (under-inflated tires reduce MPG by 0.2% per PSI). Remove excess weight from your vehicle. Use cruise control on highways. Avoid idling — turn off the engine if stopped for more than 60 seconds.
Use GasBuddy or Google Maps to find the cheapest gas nearby. Pay with cash at stations that offer a cash discount. Use grocery store fuel rewards programs — many offer 10–20 cents off per gallon. Fill up on Mondays or Tuesdays when prices are typically lowest. Avoid filling up near highways or airports where prices are higher.
When buying a car, calculate the total cost of ownership including fuel, insurance, maintenance, and depreciation — not just the purchase price. Hybrid and electric vehicles have higher upfront costs but significantly lower fuel costs. Consider whether you need a car at all — in urban areas, public transit, biking, and ridesharing may be cheaper than car ownership.