Wing Loading Calculator
Calculate wing loading (WL = W/S) and wing cube loading (WCL = W/S^1.5) for any aircraft. Free aerodynamics tool with charts and step-by-step breakdown.
About This Calculator
The Wing Loading Calculator computes two essential aerodynamic parameters for any aircraft: wing loading and wing cube loading. Wing loading is the ratio of an aircraft's weight to its wing planform area, defined by the formula WL = W/S. Wing cube loading refines this by accounting for scale effects using WCL = W/S1.5. These parameters are fundamental in aircraft design, affecting stall speed, takeoff and landing distances, turn performance, cruise efficiency, and overall handling characteristics.
The relationship between wing loading and performance is straightforward: lower wing loading enables slower flight, tighter turns, and shorter takeoff and landing distances — ideal for gliders, bush planes, and RC park flyers. Higher wing loading improves high-speed cruise efficiency and turbulence penetration, which is why commercial airliners and fighter jets have higher values. For RC aircraft, typical wing loading ranges from 0.625–2.5 lb/ft² (3–12 kg/m²), while commercial jets range from 500–800 kg/m².
To use the calculator, enter the aircraft weight in kilograms and wing area in square meters. The calculator returns wing loading in kg/m² and wing cube loading in kg/m³. If you have values in imperial units (lb or ft²), convert by dividing pounds by 2.205 to get kg, and dividing square feet by 10.764 to get m². The breakdown table shows each intermediate value, and the interactive chart visualizes the relationship between weight, area, and loading.
Frequently Asked Questions
What is wing loading?
Wing loading is the ratio of an aircraft's weight to its wing planform area. It is calculated by dividing the weight by the wing area (WL = W/S). It is a key parameter that affects aircraft performance including stall speed, turn radius, and cruise efficiency.
How do you calculate wing loading?
Wing loading is calculated by dividing the aircraft weight by the wing area using the formula WL = W/S. Wing cube loading is calculated as WCL = W/S^1.5. Both values help determine aircraft handling characteristics.
What is a good wing loading for an RC plane?
For RC aircraft, typical wing loading ranges from 0.625 to 2.5 lb/ft² (3 to 12 kg/m²). Park flyers and gliders have lower wing loading for slow flight, while sport and scale models have higher values for better wind penetration.
What is wing loading of a Boeing 747?
A Boeing 747 has a wing loading of approximately 740 kg/m² at maximum takeoff weight, with a typical operating weight around 390,000 kg and wing area of 525 m².
What is the wing loading of an F-22 Raptor?
The F-22 Raptor has a wing loading of approximately 377 kg/m². It weighs about 29,410 kg empty and has a wing area of 78 m², giving it excellent maneuverability.
How does wing loading affect aircraft performance?
Higher wing loading increases stall speed and requires longer takeoff and landing distances, but improves cruise efficiency and ride quality in turbulence. Lower wing loading allows slower flight, tighter turns, and shorter takeoff and landing, which is why gliders and bush planes have low wing loading.
What units are used for wing loading?
Wing loading is commonly measured in kg/m² (metric) or lb/ft² (imperial). Wing cube loading uses kg/m³ or lb/ft³. This calculator uses metric units — you can convert lb to kg (divide by 2.205) and ft² to m² (divide by 10.764).
What is wing cube loading (WCL)?
Wing cube loading (WCL) is a refinement of wing loading that accounts for the cubic relationship between weight and scale. It is calculated as W divided by S^1.5. WCL is particularly useful for comparing aircraft of different sizes, such as RC models vs full-scale aircraft.