By the Numbers
By the Numbers: EIA Gasoline at $4.43/Gallon — What That Means per Month
EIA weekly gasoline data lists a U.S. all-grades conventional average near $4.43 per gallon. We translate that into monthly and yearly fuel-cost examples.
The U.S. Energy Information Administration (EIA) publishes weekly U.S. retail gasoline prices as a time series. For the week ending May 18, 2026, the EIA’s “all grades, conventional” national average is listed as $4.430 per gallon, following $4.447 the week before and $4.398 two weeks before. (Series: Weekly U.S. All Grades Conventional Retail Gasoline Prices.)
“$4.43 a gallon” is a useful headline number, but most people want to know what it means for their monthly budget.
This article uses worked examples and the fuel cost calculator to translate “per gallon” into an estimated weekly, monthly, and yearly fuel spend. It is an estimate, not financial advice.
The story number
From the EIA time series (U.S. national average, all grades conventional retail):
- $4.430 per gallon (week of May 18, 2026)
- $4.447 per gallon (week of May 11, 2026)
- $4.398 per gallon (week of May 4, 2026)
The number to run
Fuel cost is a three-input calculation:
- How far you drive (miles)
- How efficient your vehicle is (miles per gallon, mpg)
- The fuel price (dollars per gallon)
Gallons used is:
- gallons = miles ÷ mpg
Fuel spend is:
- spend = gallons × price per gallon
Run the numbers (monthly examples)
Start with a simple “monthly miles” framing.
Example A:
- Miles per month: 1,000
- Fuel economy: 28 mpg
- Price: $4.43/gal
That implies:
- Gallons per month ≈ 1,000 ÷ 28 ≈ 35.7 gallons
- Estimated monthly fuel spend ≈ 35.7 × 4.43 ≈ $158
Example B (lower mileage, higher mpg):
- Miles per month: 600
- Fuel economy: 35 mpg
- Price: $4.43/gal
That implies:
- Gallons per month ≈ 17.1
- Estimated monthly fuel spend ≈ $76
Example C (higher mileage, lower mpg):
- Miles per month: 1,500
- Fuel economy: 22 mpg
- Price: $4.43/gal
That implies:
- Gallons per month ≈ 68.2
- Estimated monthly fuel spend ≈ $302
Run the numbers (annual baseline)
If you prefer an annual baseline:
- Miles per year: 12,000
- Fuel economy: 30 mpg
Gallons per year:
- 12,000 ÷ 30 = 400 gallons
At $4.43/gal:
- Estimated annual fuel spend ≈ 400 × 4.43 ≈ $1,772
What the result means
Two takeaways usually matter more than the exact cents:
- Fuel price changes are multiplied by every gallon you buy.
- Your miles driven and mpg decide how many gallons you need.
So if you want a quick sensitivity check, the best “what-if” to run is often mpg and mileage rather than only price.
Try your own numbers
Use the fuel cost calculator with:
- Your expected miles (weekly/monthly/yearly)
- Your mpg (or your vehicle’s reported combined mpg as a starting point)
- Your local fuel price
For simple comparisons, this can help too:
Caveats and source notes
- This is a simplified model: it treats mpg as constant and assumes the price is stable across the period you’re modelling.
- Real mpg depends on driving mix, traffic, weather, load, tyres, and maintenance.
- Prices vary significantly by state/region and can change quickly.
- This covers fuel only, not maintenance, insurance, parking, finance, or depreciation.
Source: EIA “Weekly U.S. All Grades Conventional Retail Gasoline Prices (Dollars per Gallon)” time series.
Reader questions
Is “all grades” the same as what I buy?
Not exactly. “All grades” averages across regular/midgrade/premium. If you usually buy a specific grade, you’ll want to use a local price for that grade in the calculator.
Why does a small per-gallon change matter?
Because you buy many gallons over time. A few cents multiplied by hundreds of gallons can add up.
Is this financial advice?
No. It’s a worked example based on public data and simplified assumptions for planning and education only.
