Latest weekly retail prices
| Region | Regular gasoline | Diesel |
|---|---|---|
| U.S. average | $4.269 a gallon1 | $6.352 a gallon1 |
| East Coast | $4.022 a gallon1 | $6.079 a gallon1 |
| New England | $4.199 a gallon1 | $6.421 a gallon1 |
| Central Atlantic | $4.251 a gallon1 | $6.496 a gallon1 |
| Lower Atlantic | $3.832 a gallon1 | $5.890 a gallon1 |
| Midwest | $4.269 a gallon1 | $6.480 a gallon1 |
| Gulf Coast | $3.702 a gallon1 | $5.951 a gallon1 |
| Rocky Mountain | $4.458 a gallon1 | $6.521 a gallon1 |
| West Coast | $5.417 a gallon1 | $7.329 a gallon1 |
| West Coast except California | $4.868 a gallon1 | $6.614 a gallon1 |
| California | $5.888 a gallon1 | $8.155 a gallon1 |
The calculator uses these figures as its default price. Pick your region and fuel type, or type the price you see at the pump.
The formula
Fuel cost = route miles ÷ mpg × price per gallon
A US gallon is defined by NIST: a US gallon is 3.785 411 784 litres2. If you compare with UK figures, remember a UK (imperial) gallon is bigger: an imperial gallon is 4.54609 litres3.
For mpg, see RV mpg by class.
Work out your own trip: open the RV rental calculator. It starts with sourced defaults and leaves the rest for your quote.
Sources
- U.S. Energy Information Administration (EIA), Gasoline and Diesel Fuel Update, data for the week of October 26, 2026. Checked October 31, 2026. Public weekly table at eia.gov/petroleum/gasdiesel (no API key used)
- NIST Handbook 44 (2026), Appendix C. Checked October 31, 2026.
- Weights and Measures Act 1985, Schedule 1 (legislation.gov.uk). Checked October 31, 2026.