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What is the specific gravity of Jet A-1 fuel at 15°C?

  • A
    0.72
  • B
    0.95
  • C
    1.00
  • D
    0.82

Refer to figure.
Specific Gravity is the ratio of the density (mass per unit volume) of a substance to the density of a given reference material. For fuel measurements (and most liquids), we use water as the reference material, which has a density of 1 kg/l, so therefore, the question is basically just asking for density, without units. The temperature for measuring the base densities of fuels is usually 15°C.

  • JET A-1: Around 0.8 kg/l (0.775 - 0.840 kg/l)
  • AVGAS: 0.72 kg/l
  • JET B: 0.78 kg/l
  • AVCAT/AVTUR: 0.82 kg/l

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