Washington Gas Prices
Current average fuel prices for Washington, sourced from the U.S. Energy Information Administration's weekly retail survey, plus a calculator prefilled with the local price.
Weekly price trend, regular gasoline
View regular gasoline trend as a table
| Week of | Price per gallon |
|---|---|
| Jun 1 | $5.524 |
| Jun 8 | $5.444 |
| Jun 15 | $5.343 |
| Jun 22 | $5.152 |
| Jun 29 | $5.029 |
| Jul 6 | $4.897 |
| Jul 13 | $4.849 |
| Jul 20 | $4.898 |
What shapes the price in Washington
Washington State features one of the most developed refining sectors on the Pacific Coast, with five major facilities operating in the Puget Sound region (Anacortes, Cherry Point, and Ferndale) processing Alaskan and Canadian crude oil. Despite this robust refining capacity, Washington retail gas prices routinely rank among the highest in the country. This is driven by the state's 49.4 cents-per-gallon motor vehicle fuel tax (one of the highest nationwide) and the implementation of Washington's Climate Commitment Act, which requires fuel suppliers to purchase carbon allowances under a cap-and-invest system.
U.S. retail gasoline prices follow a reliable seasonal cycle. Prices typically rise between February and May as refineries conduct scheduled seasonal maintenance (turnarounds) and switch production from winter-grade fuel to more expensive, low-RVP (Reid Vapor Pressure) summer blends designed to reduce ground-level smog in hot weather. Increased summer vacation driving further boosts demand. Conversely, prices typically soften following Labor Day as refiners transition back to lower-cost winter blends containing inexpensive butane, alongside lower cold-weather driving demand.
Calculate your fuel cost in Washington
Calculator Parameters
This is an estimated default price. Automatic price detection only applies to visitors in the United States. Everyone else can select their own currency and enter a local price below for an accurate result.
Enter total travelers to split gas cost fairly.
Your Calculation Results
High Consumption (> 8.5 L/100km)- Total Fuel Needed (for this trip)
- 8.88 US gallons (33.6 liters total)
- Total Fuel Cost (for this trip)
- $43.50
- Cost breakdown per distance unit
- $0.700 per mile • $0.435 per km
Fuel economy in every unit
- L/100km
- 33.6
- MPG US
- 7.0
- MPG UK
- 8.4
- km/L
- 3.0
The fuel calculator above is prefilled with Washington's current regular gasoline price. If your vehicle requires high-octane premium or runs on diesel, replace the default price with the corresponding regional price above to see your exact cost per mile and total trip fuel expense.
Calculate trip fuel costs from Washington
Planning a driving route? See exact distances, vehicle consumption comparisons, and trip gas costs for routes connecting through Washington:
Driving an EV instead?
Drivers operating an electric vehicle (EV) are not directly impacted by gasoline or diesel pump prices. Instead, EV charging costs depend on local residential and public electricity rates measured in cents per kilowatt-hour (kWh). To evaluate how electricity costs compare to gasoline in this region, use our EV versus Gas Comparator.
Open the EV versus gas comparatorLast updated July 24, 2026 at 8:38 AM UTC. Prices are refreshed from U.S. EIA weekly retail survey data.
Frequently asked questions
Washington has 5 major refineries in Puget Sound, but pump prices are driven up by a 49.4-cent state fuel excise tax and carbon credit compliance costs under the state's Climate Commitment Act cap-and-invest program, which adds roughly 20 to 30 cents per gallon to wholesale distribution costs.
Washington is isolated from California's pipeline system. Fuel refined in Puget Sound supplies Western Washington, feeds the Olympic Pipeline southward to Portland, Oregon, and reaches Eastern Washington and Idaho via the Yellowstone and Pasco pipeline networks.
Seattle and the I-5 corridor carry higher station real estate and operating costs than Eastern Washington cities like Spokane and Yakima, though pipeline transport fees across the Cascade Mountains partially offset that gap.
Premium gasoline has a higher octane rating (91 to 93 AKI), which prevents premature engine knock in high-compression and turbocharged engines. Producing high octane requires additional refinery processing steps such as catalytic alkylation and reforming, and retailers price it with wider retail margins, resulting in a consistent 50 to 70 cent premium over regular.
Price figures for Washington are derived from the U.S. Energy Information Administration's (EIA) official retail survey, updated on a weekly schedule. Individual street-corner stations adjust their posted board prices daily based on wholesale rack spot price shifts.