California Air Resources Board

The fleet average calculators are Excel spreadsheets designed to assist fleet owners in calculating their fleet average index and fleet average targets, based on the engine model year and horsepower (hp) input for each vehicle in the fleet.  The calculators allow fleet owners to experiment with different turnover, repower, and retrofit strategies to plan for compliance with the In-Use Off-Road Diesel-Fueled Fleets Regulation.

The fleet average calculator has been updated to combine both medium and large fleet requirements. If you are a large fleet with 4,000 or more vehicles, use the Fleet Average Calculator for Large Fleets with more than 4,000 vehicles.  If your fleet has greater than 2,500 hp and less than 4,000 vehicles, you will use the Fleet Average Calculator for Medium and Large Fleets. If the total hp of all the vehicles in your fleet is less than or equal to 2,500 then your fleet is small, and you would use the Fleet Average Calculator for Small Fleets.

There are exceptions to the above fleet size categories - for example, all state or federally owned fleets are large regardless of total hp.  For more information on these exceptions, see the "Fleet Size - Private Fleets" and "Fleet Size - Public Fleets" FAQ's.