LANDING
Landing Distance Calculator
Ground roll · 50ft obstacle · Stopping distance · Density altitude & runway condition
FAR 25 compliant
factored distances
Landing parameters
kg
kt
Typically 1.3 × Vstall
g
Typical 0.35–0.55g (braking + drag)
ft
°C
kt
positive = headwind · negative = tailwind
factor
Friction multiplier (higher = longer distance)
%
positive = uphill (increases landing distance)
Landing formulas
- S_g = V² / (2 × a × g) ground roll
- S_50 = S_g × 1.667 50ft obstacle (approx)
- Factor = 1 + 0.0007 × DA + 0.02 × Wind + Runway corrections
Ground roll
1,120
m
50ft obstacle
1,867
m
VREF
125
kt
Landing profile
Ground roll
50ft obstacle
Factored (×1.15)
Density altitude: 0 ft
Wind: +5 kt
Correction factors
Density altitude
0
ft
Density ratio (ρ/ρ₀)
1.000
Wind correction
1.00
×
Runway condition
1.00
×
Slope correction
1.00
×
Total factor
1.00
×
Distance breakdown
factored
Ground roll
1,120 m
50ft obstacle
1,867 m
Factored (×1.15)
2,147 m