Tennessee Gas Tax Calculator

2026

Tennessee charges 27.4¢ a gallon in state tax on gasoline and 28.4¢ on diesel in 2026, on top of the federal 18.4¢ and 24.4¢: 45.8¢ and 52.8¢ a gallon in all. Estimate your fuel costs.

By Konstantin Iakovlev · Updated October 19, 2026 · Methodology

miles
MPG
$/gal
Trip Type

Fuel Needed

1.0 gal

Trip Cost

$4.33

Annual Cost

$1,125.80

Fuel Cost Breakdown

Total Distance30.0 miles
Fuel Needed1.00 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.

Tennessee Gas Tax Overview

Tennessee’s state tax on gasoline is 27.4¢ a gallon and 28.4¢ on diesel, the rate in force since July 1, 2019. That is the 33rd-highest state gasoline tax of the 50 states and DC. No automatic adjustment; the 2017 increases were fully phased in by July 1, 2019.

With the federal 18.4¢, a gallon of gasoline carries 45.8¢ of per-gallon tax, so a 15-gallon fill-up includes about $6.87 of fuel tax whatever the pump price.

Tennessee Fuel Taxes (2026)

State Gasoline Tax 27.4¢/gal
State Diesel Tax 28.4¢/gal
Federal Excise Tax 18.4¢ gasoline / 24.4¢ diesel
Total per Gallon 45.8¢ gasoline / 52.8¢ diesel
How the State Rate Is Built Gasoline: 26¢ tax + 1¢ special petroleum tax + 0.4¢ environmental assurance fee. Diesel: 27¢ tax + the same two charges.

Official Sources:

Other Tennessee Calculators