How to Calculate Wing Loading
In this example, we will use an aircraft weighing
5-1/2 lbs (5 lbs 8 oz.) with 600 square inches of wing area. Calculating the wing loading requires that the
wing area be converted to square feet (ft2) and pounds to ounces.
1) Convert the area to square feet.
There are 144 (12 x 12) square inches in a square foot.
600 in2 ÷ 144 = 4.17 ft2
2) Convert the total empty weight
(ready-to-fly with no fuel) to ounces. There are 16 ounces in a pound.
5.5 lbs x 16 = 88 oz.
3) Divide the weight by the area:
88 oz. ÷ 4.17 ft2 = 21.1 oz./ft2
Using round numbers, this gives the aircraft a
wing-loading of 21 oz./ft2 or
You can perform the entire calculation in one
shot using simple substitution:
(Weight x 2304) ÷ Wing Area
Where weight is in pounds and wing area is in square inches
Plugging the numbers from this example into the
above formula gives us this:
( 5.5 x 2304 ) ÷ 600 = 21.1 oz./ft2
For multi-wing aircraft, divide the overall weight of the aircraft by the
total wing area for all wings.