The Real Cost
Week of September 21, 2026 · Seattle, WA
2027 Toyota Prius
10.6 gal tank · 53 MPG
$50–$58
typical fill → full tank · 10.6 galAt $5.52/gal, this tank gets you about 562 miles.
Source: EIA · Updated September 21, 2026
12-week state trend
+$0.62 over 12 wk
Local context
Seattle runs at $5.52/gal this week — about 23.2% above the U.S. average of $4.48. At this price the 2027 Toyota Prius's 53 MPG returns roughly 9.6 miles per dollar (18.9 gallons per 1,000 miles).
At a typical 12,000 miles a year — the U.S. driving average — a Seattle driver spends about $1,249 on gas in this car (use the calculator for your own mileage). For the same car, $1,359 in California (priciest reporting state at $6.00/gal) vs. $890 in Texas ($3.93/gal). $470 swing.
By the numbers
Fill cost
$50–$58
typical → full · 562 mi/tank
Per gallon
$5.52
EIA WA state weekly
Monthly · 12k mi/yr
$104.08
18.9 gal
Annual · 12k mi/yr
$1249
226 gal
The math
Why it costs what it costs.
- Fill cost = 10.6 gal × $5.52/gal = $58.47
- Miles per tank = 10.6 × 53 = 562
- Annual @ 12,000 mi (typical) = 12,000 ÷ 53 × $5.52 = $1249
Want to customize miles per year or override the pump price you saw? Use the full calculator.