**Use some simple trigonometry**

With a few simple measurements, it's possible to estimate heights with some accuracy. Take a look at the figure below. All you need to know is:

1. your distance from the building

2. your eye height

3. the angle between the ground and the top of the building

Use this formula to calculate the height of the building:

Height = (tan(angle) x distance ) + eye height

**Example:**Given a building distance of 25 meters, an angle of 37 degrees, and an eye height of 1.75 meters, the formula would be:

Height = (tan(37) x 25m) + 1.75m

= (0.75355 x 25m) + 1.75m

= 20.6m