Hawaii diesel prices today
Hawaii diesel prices todayDiesel averages $7.19 a gallon in Hawaii on 2 October 2026 — the 3rd most expensive of 51 states.
Hawaii against the other states
$0.83 a gallon above the unweighted mean of AAA's 51 state averages ($6.36). The cheapest diesel is in Texas at $5.79, the dearest in California at $8.38.
Regular gas in Hawaii is $5.63, so diesel costs $1.56 more per gallon — and more than premium at $6.14.
Tax on a gallon of diesel
$0.24 federal + $0.54 Hawaii · 5th highest of 51. The rest — about $6.41 — is the fuel itself, refining, distribution and the retailer’s margin.
Rates as of 1 January 2026. Local taxes, where they apply, are not included.
Diesel prices by city in Hawaii
AAA's diesel averages for 5 Hawaii metro areas, cheapest first — $0.45 a gallon between the two ends.
Show the data as a table
What a diesel fill-up costs in Hawaii
- Diesel car or SUV — 18 gal$129.42
- Heavy-duty pickup — 34 gal$244.46
- Box truck — 60 gal$431.40
- Semi truck, two tanks — 250 gal$1,797.50
More for Hawaii
Frequently asked questions
How much is diesel in Hawaii today?
$7.19 a gallon, AAA's Hawaii average for 2 October 2026 — the 3rd most expensive of 51 states. Regular gasoline is $5.63, so diesel costs $1.56 more per gallon.
Are diesel prices going up in Hawaii?
Diesel is down $0.00 (0.0%) on a week ago, and up $1.92 on a year ago, when it was $5.27, on AAA's own earlier averages.
Where is diesel cheapest in Hawaii?
Of the 5 metro areas AAA reports in Hawaii, Honolulu has the cheapest diesel at $7.06 a gallon and Lihue the dearest at $7.50. Individual stations vary around these averages.
How much is the diesel tax in Hawaii?
$0.78 a gallon: $0.24 federal plus $0.54 in Hawaii state taxes and fees, the 5th highest of 51. The state average is $0.36. Rates as of 1 January 2026.