Fleet Fuel Economy Tracker

A blended fleet-wide MPG smooths out the noise of individual vehicle variation and gives one number to track trends against over time -- useful for spotting whether the fleet as a whole is drifting away from its efficiency target. It's a starting benchmark, not a replacement for per-vehicle tracking, which is still the better tool for identifying which specific vehicles or drivers are dragging the average down.

The calculator first finds how many gallons the fleet would have used if it had actually achieved the target MPG over the same total mileage, then compares that to the gallons actually purchased. The gallon difference, multiplied by the fuel price entered, becomes the potential savings -- capped at zero so a fleet already beating its target doesn't show a negative, nonsensical savings figure.

Fuel cost and savings are only annualized correctly if the calculator knows whether the entered totals cover one month, one quarter, or a full year -- multiplying a month's data by 12, a quarter's by 4, or leaving a year's data as-is. Selecting the wrong reporting period will scale the annual projections incorrectly even though the period figures themselves stay accurate.

Not precisely -- it applies a single gasoline combustion factor (about 19.6 lbs CO2 per gallon) to all fuel gallons entered, while diesel actually produces somewhat more CO2 per gallon burned (commonly cited around 22.4 lbs/gallon). For a fleet that mixes fuel types, treat the emissions figure as an estimate that skews slightly low if a meaningful share of the fleet runs on diesel.