Runway Length Calculator
Calculate runway length from elevation difference and runway gradient.
Calculator
Result
About this calculator
These are simplified planning calculations and do not replace aircraft-specific AFM/POH performance data or operational procedures.
How to use this calculator
What to enter
Enter or select the following as requested: Elevation difference (m); Runway gradient (%). Follow the units, valid ranges, examples, and options displayed beside each field.
What the result means
The aviation result is an estimate based on the aircraft, route, weight, speed, wind, fuel, or performance values entered. Check units, aircraft-specific performance data, atmospheric assumptions, and whether reserve, taxi, climb, descent, and regulatory factors are included.
When to use it
Use this for educational or preliminary flight planning only. Never substitute a general calculator for the aircraft flight manual, approved performance charts, current weather, official procedures, or a pilot’s operational judgment.