Enter the traffic load (payload) and the dry operating mass into the calculator to determine the zero fuel weight.

Zero Fuel Weight Calculator

ZFW = Dry Operating Mass + Payload. Enter both to see your ZFW.

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Zero Fuel Weight Formula

The following equation is used to calculate the Zero Fuel Weight.

ZFW = TL + DOM
  • Where ZFW is the zero fuel weight (lb, kg)
  • TL is the traffic load (payload) (lb, kg)
  • DOM is the dry operating mass (lb, kg)

To calculate zero fuel weight, add together the traffic load (payload) and the dry operating mass.

What is a Zero Fuel Weight?

Definition:

Zero fuel weight (ZFW) is the aircraft’s actual weight (mass) with payload and operating items on board, excluding usable fuel. The maximum permitted ZFW is called the maximum zero fuel weight (MZFW).

How to Calculate Zero Fuel Weight?

Example Problem:

The following example outlines the steps and information needed to calculate Zero Fuel Weight.

First, determine the traffic load (payload). With the help of the calculator linked above, the traffic load is determined to be 100,000 kg.

Next, determine the dry operating mass of the airplane. In this scenario the dry operating mass is found to be 125,000 kg.

Finally, calculate the zero fuel weight using the formula and information above:

ZFW = TL + DOM

ZFW = 100,000 + 125,000

ZFW = 225,000 kg