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Which equation represents a convertion of 1 US gallon AVGAS into lbs?

  • A

    1 USG = 6 lbs

  • B

    1 USG = 3.8 lbs

  • C

    1 USG = 6.8 lbs

  • D

    1 USG = 4 lbs

This question indicates an expectation that you should know Specific Gravities (SG) for various fuels.

For reference, the common SG in aviation are:

  • AVGAS: 0.72
  • Jet B: 0.77
  • JetA1 or A: 0.8

From the general M&B syllabus we know:

  • 1 USG = 3.785 L
  • 1 kg = 2.205 lb

Applying the AVGAS SG of 0.72 we can calculate: 3.785 x 0.72 x 2.205 = 6 lbs.

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