Average fuel per hour” refers to the rate at which an aircraft consumes fuel over a given time period of one hour. It is typically expressed in terms of fuel flow rate, measured in pounds per hour (lb/hr), gallons per hour (gal/hr), liters per hour (L/hr), or other relevant units of mass or volume per time.
Average fuel per hour (kg/h)=Tavg*Tsfc
Thrust average (Ta) in n
Thrust specific fuel consumption (Tsfc)