About this calculator

Estimate fuel use across trip segments with different observed miles per gallon (MPG). Enter route distance and fuel economy for each segment, then apply an entered price per U.S. gallon.

Inputs

How to use this calculator

Trip leg or operating segment

  1. Miles in this trip segment (mi)Enter the distance from your route plan or odometer; this tool does not route.
  2. Observed fuel economy (miles per U.S. gallon)Use a matching measured/expected MPG for this leg and load condition.

Shared inputs

  1. Fuel price (USD per U.S. gallon)Your entered price; not a live national or local fuel price.

Enter the shipment or scenario values, then select Calculate result.

Method

Formula and variables

Fuel per segment = entered miles ÷ segment MPG. Sum gallons across segments. Fuel cost = total gallons × entered USD per U.S. gallon. Estimated cost per mile = total fuel cost ÷ total trip miles when miles are positive.

Miles in this trip segment (mi)
Enter the distance from your route plan or odometer; this tool does not route.
Observed fuel economy (miles per U.S. gallon)
Use a matching measured/expected MPG for this leg and load condition.
Fuel price (USD per U.S. gallon)
Your entered price; not a live national or local fuel price.

Interpret the result

The total includes fuel only. It does not calculate a route or predict vehicle consumption, and an average per-mile cost is undefined for a zero-mile trip.

Outputs: Fuel gallons, trip cost and cost per mile

Fuel only; no route-distance calculation, truck-specific consumption prediction, idle fuel, power take-off (PTO) fuel, refrigeration-unit fuel, tolls, labor, fuel tax or surcharge schedule. Use observed fuel economy and price for the relevant vehicle, load and date. Metric distance input converts to miles; fuel economy remains miles per U.S. gallon, and pump price remains U.S. dollars per U.S. gallon.

Worked example

Check the arithmetic

This example uses the starting values shown above. The arithmetic below is calculated independently of the interactive result.

Work through the calculation

  1. Fuel = 100 miles ÷ 8 miles per gallon = 12.5 U.S. gallons.
  2. Trip fuel cost = 12.5 × $3.50 = $43.75.
  3. Cost per mile = $43.75 ÷ 100 = $0.4375, displayed as $0.44/mi.

Compare the displayed result

Expected displayed result: $43.75

FAQs

Does metric mode convert MPG and pump price?

Only distance converts. MPG remains miles per U.S. gallon and fuel price remains USD per U.S. gallon, as their field labels state.

Example inputs and options

Starting values are examples unless a field identifies a dated rule. Unit selectors convert only fields marked for conversion. Rates and model options keep the units and basis shown in their labels.

Miles in this trip segment (mi)
Example: 100
Observed fuel economy (miles per U.S. gallon)
Example: 8
Fuel price (USD per U.S. gallon)
Example: 3.5