Fuel cost calculator

See what your fuel really costs

Enter your miles, fuel economy and diesel price. You will see total fuel spend for a trip, a month or a year, what idling adds, and what a small change in price or MPG is worth.

Time frame

What are you pricing?

Driving

Per truck

Miles per monthLoaded and empty miles together

Average fuel economyCheck your fuel card or ELD reports

MPG

Diesel priceAverage price you pay per gallon, after discounts

$/gal

Idling

Fuel burned while parked

Idle hours per monthTwo hours a day for 22 days is 44 hours

hrs

Fuel burned per idle hourAbout 0.8 gallons for most Class 8 trucks

gal/hr

Fleet

One truck for an owner-operator

Number of trucks

trucks

The starting numbers are an example for five Class 8 tractors each running about 10,000 miles a month, at the U.S. average diesel price for the week of October 26, 2026. Replace them with your own.

Driving fuel is miles divided by MPG. Idle fuel is idle hours times gallons per hour. Both are multiplied by diesel price and number of trucks.

Is your fuel spend above benchmark?

We review fuel card data, MPG and idle time by unit, compare it to fleets like yours, and show you where the gallons are going.

Request a fleet cost analysis