Enter the altitude above sea level and the depth below the reference point into the calculator to determine the ground elevation. This calculator can also evaluate any of the variables given the others are known.

## Ground Elevation Formula

The following formula is used to calculate the ground elevation.

GE = ASL - D

Variables:

- GE is the ground elevation (meters)
- ASL is the altitude above sea level (meters)
- D is the depth below the reference point (meters)

To calculate the ground elevation, subtract the depth below the reference point from the altitude above sea level. This will give the height of the earth’s surface above the standard reference point.

## What is a Ground Elevation?

Ground elevation refers to the height of the earth’s surface above a standard reference point, typically mean sea level. This measurement is used in various fields such as construction, aviation, and environmental science to understand the topography of the land, plan infrastructure, or navigate aircraft. Ground elevation can vary significantly from place to place due to geographical features like mountains, valleys, and plains.

## How to Calculate Ground Elevation?

The following steps outline how to calculate the Ground Elevation (GE) using the formula GE = ASL – D.

- First, determine the altitude above sea level (ASL) in meters.
- Next, determine the depth below the reference point (D) in meters.
- Next, use the formula GE = ASL – D to calculate the ground elevation.
- Finally, calculate the Ground Elevation (GE).
- After inserting the values for ASL and D into the formula, calculate the result.

**Example Problem:**

Use the following variables as an example problem to test your knowledge.

ASL (altitude above sea level) = 500 meters

D (depth below the reference point) = 100 meters