Takeoff Distance Calculator

Estimate takeoff ground roll and distance over 50ft obstacle.

From POH at sea level, standard day, max gross
Use negative for tailwind
Below max gross weight
+ uphill, - downhill

Rules of Thumb

  • Altitude: +10-12% per 1,000 ft density altitude
  • Headwind: -7% per 10% of Vr headwind
  • Tailwind: +10% per 2 knots tailwind
  • Grass: +20% for firm, +30% for soft
  • Slope: +10% per 1% uphill slope