Fleet Fuel Cost Calculator: 2026 Cost Per Mile and Fuel Surcharge
Prefilled at $6.35/gal (EIA national average, updated October 26, 2026). Supports single trucks, multi-truck fleets, and fuel surcharge calculation.
Fleet Results
Cost per mile$0.907
Monthly gallons1429
Monthly fuel spend$9,074.29
Annual fuel spend$108,891
FAQ
How do I calculate fleet fuel cost per mile? +
Cost per mile = diesel price / fuel efficiency (mpg). At $6.35/gal and 7 mpg, cost per mile = $0.907. For a 10,000-mile truck per month, fuel cost = $9074/month per truck. The fleet calculator above scales this by number of trucks and lets you apply a fleet card discount to see potential savings.
What is a fuel surcharge and how is it calculated? +
A fuel surcharge (FSC) is an added cost per mile or per load that shippers pay carriers when diesel exceeds a baseline price. The OOIDA methodology takes the fuel cost increment above that baseline, divides by miles per gallon, and expresses it per mile. Worked at the current EIA US average: with a $3.00/gal baseline and a current price of $6.352, the increment is $3.352. At 7 mpg that is $0.479 per mile. Multiply by load miles for the per-load surcharge.
How much can a fleet card save per month? +
At 10,000 miles a month per truck and 7 mpg, a truck burns about 1,429 gallons a month. At 10 cents/gal (Comdata Total Advantage's published rate at Pilot), that is about $143 per truck a month or $1,714 a year. At 40 cents/gal (its published maximum at TA Petro), about $571 per truck a month or $6,857 a year. For a 10-truck fleet: about $1,429 a month at 10 cents and $5,714 at 40 cents. Subtract the card's fees, which Comdata publishes by product (no monthly fee up to $129 per account a month).