Gas prices in California

Regular gas costs an average of $6.19 a gallon in California, and diesel $8.18, based on California's figure for the week of September 28, 2026. That's 172 cents above the national average.

Fuel	California	U.S. average
Regular	$6.19	$4.47
Diesel	$8.18	$6.38

What gas costs in California

Filling a 15-gallon tank with regular costs about $92.85. A 300-mile road trip in a car that gets 25 mpg uses 12 gallons, which comes to about $74.28.

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Frequently asked questions

How much is gas in California right now?

Regular gas averages $6.19 a gallon based on California's figure for the week of September 28, 2026.

How much is diesel in California?

Diesel averages $8.18 a gallon based on the California figure.

How much does it cost to fill up in California?

A 15-gallon tank of regular costs about $92.85 at the average price.

Where do these prices come from?

The U.S. Energy Information Administration surveys retail gas stations every week and publishes averages for the nation, regions and nine states every Monday.