How Regional Fuel Price Comparator Works?
This tool works by subtracting Region A's price per gallon from Region B's price and multiplying by the gallons a trip needs. The result is the cost gap between buying fuel in 2 regions.
Enter Region A price
Type the price in the cheaper state or region, for example $3.25 per gallon.
Enter Region B price
Type the price in the more expensive region, for example $4.65 per gallon.
Enter trip gallons
Type the gallons you need, for example 35 gallons (132 L).
Read the price difference
The tool returns the dollar gap for those gallons.
Regional Fuel Price Comparator Formula
The formula is Difference = (Region B Price − Region A Price) × Gallons.
Difference = (Region B Price − Region A Price) × GallonsFormula variables
- Region B Price − Region A Price
- Regional price difference per US gallon (3.785 L).
- Gallons
- Fuel bought for the trip.
Worked example
- State/Region A Price: $3.25/gal
- State/Region B Price: $4.65/gal
- Trip Gallons: 35 gal
- Price gap: $4.65 − $3.25 = $1.40 per gallon.
- Difference: $1.40 × 35 = $49.00.
Result: $49.00 ($ price difference)
State fuel taxes drive much of the regional gap. US state gasoline taxes range from under $0.10 to about $0.70 per gallon.
Regional Fuel Price Comparator Conversion Table
The table shows the cost gap for 3 fuel amounts at 3 Region B prices, with Region A at $3.25.
Rows: Trip Gallons (gal). Columns: State/Region B Price ($/gal). Cells: $ price difference.
| gal | $3.75/gal | $4.65/gal | $5.25/gal |
|---|---|---|---|
| 15 gal | $7.50 | $21.00 | $30.00 |
| 35 gal | $17.50 | $49.00 | $70.00 |
| 60 gal | $30.00 | $84.00 | $120.00 |
Values held constant: State/Region A Price = $3.25/gal.
Buying 60 gallons (227 L) at $5.25 instead of $3.25 costs $120.00 more.
What is Regional Fuel Price Comparator?
The Regional Fuel Price Comparator is a tool that compares the cost of buying fuel in 2 states or regions. The tool shows where filling up saves money.
4 factors set regional fuel prices: taxes, refinery supply, fuel blend rules, and transport costs. West Coast states often pay $1.00 or more per gallon above Gulf Coast states.
The comparator helps travelers time fill-ups before crossing into a high-price state.
What are the uses of Regional Fuel Price Comparator?
There are 4 main uses of the Regional Fuel Price Comparator: timing fill-ups near state lines, comparing living costs before a move, planning interstate road trips, and pricing regional delivery routes.
Timing fill-ups near state lines
Drivers fill up in the cheaper state before crossing.
Comparing living costs before a move
Families add fuel price gaps to relocation budgets.
Planning interstate road trips
Travelers plan fuel stops in low-price states.
Pricing regional delivery routes
Fleets set fuel budgets per region.
Need every metric in one place? Open the main MPG Cost Calculator or browse all 101 fuel calculators.