Diesel Prices in California Today
Average diesel price in California: $8.502 per gallon on October 20, 2026. EIA U.S. weekly average $6.276. Current
What is the price of diesel in California today?
Diesel in California averages $8.502 per gallon (AAA daily state average, October 20, 2026), $2.226 more than the U.S. average of $6.276. California ranks #51 of 51 for cheapest diesel (1 = cheapest). A loaded semi at about 6.3 mpg spends about $1.35 per mile on fuel in California.
per gallon, October 20, 2026
U.S. average $6.276
of 51 (1 = cheapest)
semi truck, today price
Fuel cost per mile in California
Estimated diesel cost at the today California price of $8.502 a gallon, using fuel economy calibrated to FHWA and NACFE data.
| Truck | Fuel per mile | Fuel per 1,000 miles |
|---|---|---|
| Dry Van38,000 lbs, ~6.3 mpg | $1.35 | $1,352 |
| Reefer38,000 lbs, ~6.0 mpg | $1.41 | $1,408 |
| Flatbed40,000 lbs, ~6.0 mpg | $1.41 | $1,406 |
| Hotshot12,000 lbs, ~8.9 mpg | $0.95 | $955 |
| Box Truck7,000 lbs, ~9.1 mpg | $0.93 | $932 |
Your numbers depend on load weight, speed, terrain and idling. Enter them in the truck fuel cost calculator for an exact estimate.
Frequently asked questions
What is the price of diesel in California today?
Diesel in California averages $8.502 per gallon (AAA daily state average, October 20, 2026), $2.226 more than the U.S. average of $6.276. California ranks #51 of 51 for cheapest diesel (1 = cheapest). A loaded semi at about 6.3 mpg spends about $1.35 per mile on fuel in California.
How much does it cost to fill a semi truck in California?
At $8.50 a gallon, 150 gallons of diesel costs about $1,275 and 200 gallons about $1,700 in California at the today average.
Is diesel cheaper in California than nearby states?
California is priced on its own regional market. California is $8.502.
How often are California diesel prices updated?
The page checks for new prices twice a day. AAA publishes daily state averages; the EIA weekly regional average is shown only if a state has no daily value. If a source stops updating, the last value stays with its real date and a stale label.
Running freight through California?
Texas Solutions dispatches semis for 5%, hotshots for 7% and box trucks for 8% of weekly gross. We plan lanes to cut empty miles and fuel.
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