What is the correct unit of measure for glass in estimates?

The correct unit of measure for glass in estimates is square foot. This is primarily because glass is typically used in the construction of windows and other flat surfaces, where the area needs to be calculated for pricing and installation. The square foot measurement directly relates to the surface area, which is vital for determining how much glass is needed for a particular application.

When estimating for materials like glass, it's essential to consider the area it covers rather than its volume or perimeter. Hence, square foot is specifically used to quantify flat surfaces. Other units of measure, such as linear feet, are more suited for lengths of materials that are used in different contexts, like framing or piping, while cubic foot would apply to volume-based materials, which is not relevant here. Square meter, while a valid measurement unit for area, is less common in the United States, where square foot is typically preferred for construction estimates.