Takeoff Distance Calculator

TAKEOFF

Takeoff Distance Calculator

Ground roll · 50ft obstacle clearance · Density altitude · Wind & slope correction

FAR 25 compliant factored distances

Takeoff parameters

Aircraft weight

Lift-off speed (V_LOF)

Acceleration (average)

Typical 0.25–0.45g for transport aircraft

Pressure altitude

Temperature (OAT)

°C

Headwind component

positive = headwind · negative = tailwind

Runway slope

positive = uphill

Takeoff formulas

S_g = V² / (2 × a × g) ground roll
S_50 = S_g × 1.5 50ft obstacle (approx)
Factor = 1 + 0.0007 × DA + 0.02 × Wind density & wind

                     Ground roll
                    1,540
                    m
                

50ft obstacle 2,310 m

V_LOF 135 kt

Takeoff profile Ground roll 50ft obstacle

Density altitude: 0 ft Wind: 0 kt

Correction factors

Density altitude 0 ft

Density ratio (ρ/ρ₀) 1.000

Wind correction 1.00 ×

Slope correction 1.00 ×

                            Total factor
                            1.00
                            ×
                        

Distance breakdown factored

Ground roll

1,540 m

Obstacle (50ft)

2,310 m

Factored (×1.15)

2,657 m

Weight: 65,000 kg OAT: 15°C Slope: 0%

TAKEOFF