Wing Loading Calculator
Weight Divided by Wing, Explained by the Numbers
Wing loading packs a lot of information about how an aircraft flies into one simple ratio: weight carried per unit of wing area. Low wing loading means a large wing relative to weight, which favors slow flight, short landing distances, and gentle stalls; high wing loading means a small wing carrying a lot of weight, which favors speed and a smooth ride through turbulence at the cost of higher stall speed and longer runway requirements.
The Formula
Where This Calculation Matters
- Stall speed estimation — stall speed increases with the square root of wing loading, so a heavily loaded wing stalls at a meaningfully higher speed than a lightly loaded one of the same design.
- Runway length requirements — higher wing loading generally means higher approach and landing speeds, which drives longer required runway length.
- Ride quality in turbulence — a higher wing loading gives an aircraft more inertia relative to its lifting surface, smoothing out the bumps from gusts compared to a lightly loaded airframe.
- Category comparison — comparing a design's wing loading against known categories (trainer, glider, airliner, fighter) gives a quick sanity check on whether a new design's performance targets are realistic.
Worked Examples
| Weight | Wing area | Wing loading |
|---|---|---|
| 10,000 N | 16 m² | 625.0 N/m² |
| 750,000 N | 510 m² | 1,470.6 N/m² |
Light general-aviation aircraft typically sit at the low end of the wing loading range, while high-speed jets and airliners sit at the high end — trading low-speed handling for cruise efficiency and a smoother ride at altitude.
How to Use This Calculator
- Enter the aircraft weight in newtons.
- Enter the wing area in square meters.
- Select Calculate to get the wing loading.
Related Calculations
Check the lift being generated at a given speed with the Lift Coefficient Calculator, or compare against the thrust available with the Thrust to Weight Ratio Calculator.