Fuel quantities are based on how many pounds per US gallon?

• A. 6.75
• B. 6.50
• C. 7.00
• D. 6.80

Answer: (A)

Fuel planning relies on weight, not volume, because how heavy the fuel is directly affects aircraft takeoff, climb, and endurance. To convert from volume to weight, a standard density is used. For Jet fuel, the conventional planning figure is 6.75 pounds per US gallon. This nominal value lets you estimate total fuel weight by multiplying the gallons on board by 6.75. For example, 50 gallons would weigh about 337.5 pounds. Temperature can change actual density, but 6.75 lb/gal is the agreed-upon reference used in many training materials and calculations. Other numbers exist, but 6.75 is the standard reference for Jet fuel in typical planning scenarios.