What is the most efficient way to calculate fuel consumption for an Audi A4?

I am trying to optimize my fuel usage for my daily commute with my Audi A4. What is the best method for accurately calculating my fuel consumption?

The most accurate way to calculate fuel consumption for an Audi A4 is to keep track of the miles you drive and the amount of fuel you fill up each time. Then, divide the miles driven by the gallons used to determine your car's fuel efficiency.

Using a fuel economy calculator can also give you a more accurate estimate of your Audi A4's fuel consumption. These calculators take into account your driving habits, traffic conditions, and terrain to provide a more personalized estimate.