Enter the current fuel level (gallons) and the maximum fuel level (gallons) into the Calculator. The calculator will evaluate the Fuel Percentage. 

Fuel Percentage Formula

FP = CFL / MFL *100


  • FP is the Fuel Percentage (%)
  • CFL is the current fuel level (gallons)
  • MFL is the maximum fuel level (gallons)

To calculate Fuel Percentage, divide the current fuel level by the maximum fuel level, then multiply by 100.

How to Calculate Fuel Percentage?

The following steps outline how to calculate the Fuel Percentage.

  1. First, determine the current fuel level (gallons). 
  2. Next, determine the maximum fuel level (gallons). 
  3. Next, gather the formula from above = FP = CFL / MFL *100.
  4. Finally, calculate the Fuel Percentage.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

current fuel level (gallons) = 30

maximum fuel level (gallons) = 60

Frequently Asked Questions

What is the importance of calculating fuel percentage?

Calculating fuel percentage helps in understanding how much fuel is left in the tank in relation to its capacity, allowing for better planning of refueling stops and management of fuel consumption.

Can the fuel percentage formula be used for any type of fuel?

Yes, the fuel percentage formula is universal and can be applied to any type of fuel as long as you know the current and maximum fuel levels in the same measurement unit.

How can calculating fuel percentage help in improving fuel efficiency?

By regularly monitoring fuel percentage, one can identify patterns in fuel consumption under different driving conditions, leading to adjustments in driving habits that can improve fuel efficiency.