How do I calculate fuel cost for a trip?

Divide trip distance by your vehicle's MPG, then multiply by gas price. Formula: Fuel Cost = (Distance ÷ MPG) × Gas Price.

What is a good MPG for a car?

New cars average 25-30 MPG combined. Hybrids achieve 45-55 MPG. Trucks and SUVs typically get 15-22 MPG.

How much does fuel cost per mile?

At $3.50/gallon and 25 MPG, fuel costs about $0.14 per mile. At 20 MPG, it's $0.175 per mile.

How can I reduce fuel costs?

Drive efficiently, maintain proper tire pressure, reduce weight, avoid aggressive driving, and use fuel rewards programs.

How many gallons for a 500-mile trip?

At 25 MPG, a 500-mile trip uses 20 gallons. At 30 MPG, it uses 16.7 gallons.

Does fuel cost more in summer?

Yes, gas prices typically rise in summer due to increased demand and summer-blend fuel requirements.

Fuel Cost Calculator – Calculate Gas Costs for a Trip (2026)

What is a Fuel Cost Calculator?

A fuel cost calculator is a financial tool that estimates how much you'll spend on gasoline for a specific trip. It calculates the total cost based on trip distance, your vehicle's fuel efficiency (MPG), and the current gas price.

Understanding fuel costs is essential for trip planning and budgeting. Whether you're planning a cross-country road trip or just commuting to work, knowing your fuel expenses helps you make informed decisions about transportation.

The calculator also shows cost per mile, gallons needed, and cost per person when splitting with passengers. This information is valuable for ride-sharing, carpooling, and business travel expense reporting.

How to Calculate Fuel Cost

Calculating fuel cost involves three simple steps:

Determine Trip Distance: Total miles you plan to drive.
Note Vehicle MPG: Your car's fuel efficiency rating.
Find Gas Price: Current price per gallon in your area.
Calculate: Distance ÷ MPG = Gallons, then Gallons × Price = Cost.

Fuel Cost Formula

Gallons Needed = Trip Distance ÷ MPG

Total Fuel Cost = Gallons Needed × Gas Price

Cost Per Mile = Gas Price ÷ MPG

Cost Per Person = Total Cost ÷ Passengers

Round Trip Cost = One-Way Cost × 2

Example Calculation

500-mile trip at 25 MPG with $3.50/gallon gas:

Trip Distance	500 miles
Vehicle MPG	25 MPG
Gas Price	$3.50/gallon
Gallons Needed	20 gallons
Total Fuel Cost	$70.00
Cost Per Mile	$0.14
Round Trip Cost	$140.00

Miles Per Gallon

Miles per gallon (MPG) measures your vehicle's fuel efficiency—how many miles it can travel on one gallon of gasoline. Higher MPG means better fuel efficiency and lower fuel costs.

Average MPG by vehicle type:

Hybrid Cars: 45-55 MPG
Compact Cars: 30-40 MPG
Midsize Cars: 25-35 MPG
SUVs: 20-28 MPG
Trucks: 15-22 MPG

Improving your MPG by even 5 miles per gallon can save hundreds of dollars per year in fuel costs.

Gas Price

Gas prices vary significantly by location, season, and market conditions. As of 2026, average gas prices range from $3.00 to $4.50 per gallon depending on state and region.

Factors affecting gas prices:

Crude Oil Prices: The largest component of gas prices.
State Taxes: Vary from $0.15 to $0.75 per gallon.
Season: Summer blend fuel costs more.
Location: Coastal states typically pay more.
Supply and Demand: Regional variations.

Distance

Trip distance is the total miles you'll drive. For one-way trips, this is the direct distance. For round trips, double the one-way distance. Consider detours, sightseeing, and local driving at your destination.

Here's how distance affects fuel cost at 25 MPG and $3.50/gallon:

100 Miles: 4 gallons, $14.00
250 Miles: 10 gallons, $35.00
500 Miles: 20 gallons, $70.00
1,000 Miles: 40 gallons, $140.00
3,000 Miles: 120 gallons, $420.00

Road Trip Fuel Cost

Planning a road trip requires accurate fuel cost estimates. A cross-country trip of 3,000 miles in a vehicle getting 25 MPG would use 120 gallons. At $3.50/gallon, that's $420 in fuel—a significant expense.

Here are fuel costs for common road trips at 25 MPG and $3.50/gallon: