Fuel Surcharge Calculator
Work out a trucking fuel surcharge per mile from the current DOE diesel average, your peg price, and fleet MPG. The diesel number below is prefilled with this week's published DOE/EIA average, so you start from today's real figure.
DOE diesel prefilled at $4.67 (as of Jun 29, 2026). Formula: current diesel minus base price, divided by MPG, floored at zero. Source: U.S. diesel price, EIA weekly.
How a fuel surcharge works
A fuel surcharge separates the fuel portion of a freight rate from the base rate, so neither side carries the full risk when diesel moves. The base rate assumes a "peg" diesel price. When the published DOE diesel average rises above that peg, the surcharge covers the difference; when it falls back, the surcharge shrinks or goes to zero.
Pegging to the DOE national average works because it is public, weekly, and neutral: both the carrier and the shipper can look up the same number. Dividing the above-peg amount by the truck's miles per gallon converts a per-gallon gap into the per-mile figure that gets billed on the load.