Truck Fuel Cost Calculator

Estimate fuel costs for any trip to calculate load profitability

Average semi: 5.5-7.5 MPG
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Fuel Cost Breakdown

Trip Distance --
Effective MPG --
Gallons Required --
Total Fuel Cost --
Cost Per Mile --

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TruckerPro automatically tracks fuel purchases and integrates with fuel card providers.

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Accurate Estimates

Factors in load weight, terrain type, and real-world MPG adjustments to give you the most accurate fuel cost estimate possible.

Load-Adjusted MPG

Running empty vs. loaded makes a big difference. Our calculator adjusts fuel efficiency based on whether you are loaded, partial, or deadheading.

Terrain Factors

Mountainous routes burn significantly more fuel. Select your terrain type for a realistic cost projection on hilly or flat routes.

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How to Use the Truck Fuel Cost Calculator

  1. Enter your trip distance in miles
  2. Set your truck's fuel efficiency (MPG) — average semi is 5.5-7.5 MPG
  3. Set the current diesel price per gallon
  4. Select your load type (loaded, partial, or empty)
  5. Select the terrain type (flat, mixed, or mountainous)
  6. Click Calculate Fuel Cost to see your breakdown

Example Calculation

A 500-mile trip at 6.5 MPG with diesel at $3.85/gallon (loaded, mixed terrain): Effective MPG = 6.5 × 0.85 × 1.0 = 5.53 MPG. Gallons needed = 500 / 5.53 = 90.5 gal. Total fuel cost = 90.5 × $3.85 = $348.37. Cost per mile = $0.697.

Frequently Asked Questions

What is the average MPG for a semi truck?

The average fuel efficiency for a semi truck is 5.5 to 7.5 MPG, depending on the truck age, engine type, load weight, and driving conditions. Newer trucks with aerodynamic features tend to be on the higher end.

Does terrain affect fuel cost?

Yes, mountainous terrain can reduce your MPG by up to 20% compared to flat highways. Hills require more engine power, burning significantly more fuel. Our calculator adjusts for flat, mixed, and mountainous terrain.

How can I reduce my fuel costs?

Maintain proper tire pressure, avoid excessive idling, plan fuel-efficient routes, use cruise control on highways, and fuel up at cheaper truck stops. Even small MPG improvements save hundreds over a month.

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