How do I convert gallons per hour to pounds per hour?

Multiply by the fuel planning density (e.g. AVGAS 6.0 lb/US gal, Jet A 6.7 lb/US gal).

How is endurance calculated?

Endurance (hours) = fuel remaining ÷ burn rate, using the same unit family.

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Convert burn rates such as 12 gph to lb/h and estimate endurance from fuel remaining.

Common questions about fuel flow & endurance.