Calculate fuel costs for your trips based on distance, consumption, and fuel price.
Result
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Total Fuel Cost
Total Fuel Needed-
Cost per km-
⚙️ How It Works
A fuel cost calculator estimates how much you'll spend on gas for a trip or over a period of time. It takes your vehicle's fuel efficiency (MPG or L/100km), the distance traveled, and the current fuel price to calculate total fuel cost. It can also compare the cost difference between two vehicles.
Fuel Used = Distance / Fuel Efficiency (MPG) | Cost = Fuel Used × Price per Gallon | L/100km: Cost = (Distance × Price per Liter × Efficiency) / 100
Editorial Standards
Author
BetterProduct Everyday Tools Team - Household cost and shopping editorial QA
Reviewed by
Reviewed against FuelEconomy.gov mileage guidance and trip-cost formulas.
Updated
April 2026
Best used for
Fuel cost planning for commuting, trips, and mileage comparisons.
Languages checked
7 language editions aligned from the same source formulas.
Use Results Responsibly
Check units and formats before you calculate.
Round only at the end if precision matters.
Use official records for deadlines, utility rates, or school policies when applicable.
Key strategies: maintain proper tire pressure (under-inflation reduces MPG by 0.2% per PSI), drive at steady speeds (highway cruise control helps), avoid rapid acceleration and hard braking, remove excess weight, and keep up with maintenance (air filter, spark plugs, oil changes).
What is the difference between city and highway MPG?
City MPG is lower because of frequent stops, idling, and acceleration. Highway MPG is higher due to steady speeds and less braking. The EPA combined rating is 55% city/45% highway. Real-world MPG often differs from EPA estimates based on driving habits.
How do electric vehicles compare in fuel costs?
EVs are significantly cheaper to 'fuel.' At $0.13/kWh electricity and 3.5 miles/kWh efficiency, driving 100 miles costs about $3.70. At $3.50/gallon and 30 MPG, the same distance costs $11.67. EVs typically save $1,000–$2,000/year in fuel costs.
What factors affect gas prices?
Gas prices are primarily driven by crude oil prices (about 50% of the cost), refining costs (15%), distribution and marketing (15%), and taxes (15–20%). Seasonal demand, regional supply disruptions, and geopolitical events cause price fluctuations.