Diesel Direct

Diesel Exhaust Fluid Consumption Calculator

Enter your information in the fields below to discover your annual and monthly DEF usage.

Number of Vehicles in Fleet:
Annual mileage per vehicle:
Average miles per gallon:

* For example:
Heavy Duty Vehicles average 5-7.5 mi/gallon
Medium Duty Vehicles average 9-11.5 mi/gallon
Light Duty Vehicles average 14-16.5 mi/gallon
Estimated DEF Usage
Your annual DEF consumption:
0 gallons

Your monthly DEF consumption:
0 gallons

The Diesel Exhaust Fluid consumption above is calculated using a rate of 3% DEF per gallon of

Now that you have calculated the amount of Diesel Exhaust Fluid you consume, we would like to help you save time and money. Our DEF DirectSM delivery and replenishment program will provide you with a guarantee of service and safety. We will automatically fill your vehicles' DEF tanks on a regular schedule and manage your fleet's data seamlessly by providing you with all necessary reports for accurate billing, management, and inventory control.