Calculate runway slope percent using elevation difference and runway length. This free aviation calculator helps pilots better understand runway gradient and performance planning.
Enter runway elevation difference and runway length to estimate slope percent and determine whether the runway is upslope or downslope.
This calculator helps estimate runway gradient only. Always use approved aircraft performance data for operational decisions.
Runway slope describes how much a runway rises or falls over its length. It is usually expressed as a percent and may also be described in feet of elevation change over a certain runway distance.
Even a relatively small runway slope can affect aircraft performance. Upslope and downslope runways may change takeoff and landing distance requirements, especially in hot, high, or wet conditions.
Upslope runways can increase the runway distance required for takeoff, while downslope runways may reduce it. Actual effects depend on aircraft performance data and conditions.
Downslope runways can increase landing rollout distance, while upslope runways may help reduce it. Actual effects depend on aircraft performance data and conditions.
A 1% slope means the runway changes elevation by 1 foot for every 100 feet of runway length.
No. This calculator is a planning aid. Always use official airport data, runway information, and approved aircraft performance data when making operational decisions.