Verify before flight. Check the POH/AFM for aircraft-specific limits and performance.
Performance
Power Loading Calculator
Calculate aircraft power loading in pounds per horsepower and horsepower per 1,000 pounds from weight and engine power.
lb
hp
Power loading—
HP per 1,000 lb—
Power—
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2,550 pounds and 180 horsepower
A 2,550 lb aircraft with 180 hp has 2,550 / 180 = 14.17 lb/hp, or about 70.6 hp per 1,000 lb.
This comparison does not account for propeller efficiency, drag or power available at altitude. It cannot by itself predict climb performance.
Formula and method
Power loading = aircraft weight ÷ horsepower.