Oklahoma Gas Tax Calculator
2026Oklahoma charges 20¢ a gallon in state tax on gasoline and 20¢ on diesel in 2026, on top of the federal 18.4¢ and 24.4¢: 38.4¢ and 44.4¢ a gallon in all. Estimate your fuel costs.
By Konstantin Iakovlev · Updated October 19, 2026 · Methodology
Fuel Needed
1.0 gal
Trip Cost
$4.33
Annual Cost
$1,125.80
Fuel Cost Breakdown
| Total Distance | 30.0 miles |
| Fuel Needed | 1.00 gallons |
| One-Way Cost | $4.33 |
| Trip Cost | $4.33 |
| Weekly Cost | $21.65 |
| Monthly Cost | $93.82 |
| Annual Cost | $1,125.80 |
Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.
Oklahoma Gas Tax Overview
Oklahoma’s state tax on gasoline is 20¢ a gallon and 20¢ on diesel. That is the 46th-highest state gasoline tax of the 50 states and DC. No automatic adjustment.
With the federal 18.4¢, a gallon of gasoline carries 38.4¢ of per-gallon tax, so a 15-gallon fill-up includes about $5.76 of fuel tax whatever the pump price.
Oklahoma Fuel Taxes (2026)
| State Gasoline Tax | 20¢/gal |
| State Diesel Tax | 20¢/gal |
| Federal Excise Tax | 18.4¢ gasoline / 24.4¢ diesel |
| Total per Gallon | 38.4¢ gasoline / 44.4¢ diesel |
| How the State Rate Is Built | Gasoline and diesel: 19¢ motor fuel tax + 1¢ storage tank cleanup fund assessment. |
Official Sources: