GasCostCalHow do I calculate gas for a round trip?
Double your one-way distance before dividing by MPG and multiplying by the gas price. Select Round trip in the calculator to include both drives automatically.
Gas Cost Calculator
Calculate your trip’s gas cost at current weekly US prices, and split it with the people sharing the drive.
YOUR FUEL BUDGET
Total gas cost
$47.94
300 miles · one way
- Fuel needed
- 12.00 gal
- Per person
- $47.94
- Cost per mile
- $0.160 / mi
- Total distance
- 300 mi
Based on 25 MPG and $3.995/gal, the EIA weekly default above.
Planning the return drive? Choose Round trip to include both legs.
PLAN YOUR ROAD TRIP
How much gas money for 100 to 1,000 miles?
At the US regular average of $3.995/gal, a 300-mile trip at 25 MPG costs $47.94. Use the table to compare one-way trips at different fuel economies.
EIA weekly price for · EMM_EPMR_PTE_NUS_DPG.W
| Trip distance | 20 MPG | 25 MPG | 30 MPG | 35 MPG |
|---|---|---|---|---|
| 100 miles | $19.98 | $15.98 | $13.32 | $11.41 |
| 300 miles | $59.93 | $47.94 | $39.95 | $34.24 |
| 500 miles | $99.88 | $79.90 | $66.58 | $57.07 |
| 1,000 miles | $199.75 | $159.80 | $133.17 | $114.14 |
THE QUICK MATH
How to calculate gas cost for a trip
Divide your total miles by your vehicle’s MPG, then multiply the gallons by the price per gallon.
For a 300-mile drive at 25 MPG, you need 12 gallons. At $3.995/gal, that comes to $47.94. Divide the total by the number of people to split it evenly.
Example price: EIA EMM_EPMR_PTE_NUS_DPG.W · Nov 9, 2026.
TRIP FUEL COST
ROUND TRIP
(Miles ÷ MPG) × Price per gallon
ROUND TRIP
One-way miles × 2
YOUR STARTING PRICE
Weekly US gas prices by region
These EIA retail averages include taxes and are in dollars per US gallon. Choose your state above for its published state price or its PADD regional average. Select a price to open its EIA source.
Swipe or scroll sideways to compare all fuel types.
| Region | Regular | Midgrade | Premium | Diesel |
|---|---|---|---|---|
| United States | $3.995 | $4.608 | $5.013 | $6.127 |
| East Coast (PADD 1) | $3.847 | $4.363 | $4.766 | $5.920 |
| New England (PADD 1A) | $4.060 | $4.709 | $5.071 | $6.349 |
| Central Atlantic (PADD 1B) | $4.146 | $4.669 | $5.027 | $6.412 |
| Lower Atlantic (PADD 1C) | $3.609 | $4.103 | $4.494 | $5.694 |
| Midwest (PADD 2) | $3.868 | $4.362 | $4.986 | $6.201 |
| Gulf Coast (PADD 3) | $3.481 | $4.024 | $4.370 | $5.741 |
| Rocky Mountain (PADD 4) | $3.946 | $4.321 | $4.638 | $6.206 |
| West Coast (PADD 5) | $5.110 | $5.593 | $5.761 | $7.110 Except California: $6.429 |
Source: US Energy Information Administration, Gasoline and Diesel Fuel Update. Snapshot retrieved Nov 12, 2026.
BEFORE YOU GO
Trip fuel cost questions
How much gas money should each person pay?
Divide the trip’s total gas cost by the number of people sharing it, including the driver when everyone pays equally. Enter that number under People sharing to see each person’s share.
Which gas price does the calculator use for my state?
The calculator uses EIA’s weekly state average for California, Colorado, Florida, Massachusetts, Minnesota, New York, Ohio, Texas, and Washington when that fuel is published. Other selections use the state’s PADD regional average; diesel uses California’s state price or a regional price. The location, week, and EIA series appear under the price field.
Can I use the price at my local gas station?
Yes. Enter your pump price in Price per gallon to calculate with your own rate. Choosing a different state or fuel type loads its EIA weekly default.
Which MPG should I use for a road trip?
Use your measured MPG for similar driving, or choose your vehicle to fill in EPA combined MPG from FuelEconomy.gov. A mostly highway trip can use your vehicle’s highway MPG, entered directly in the fuel economy field.
Can I calculate diesel fuel cost?
Yes. Choose Diesel, enter your diesel vehicle’s MPG, and use the sourced weekly diesel price or your own pump price.