Measurement of Area Area measurement takes place in two dimensions which includes its length multiplied by its width. An area is deemed to be a quantity that is a calculation of two dimensions. The area of any shape can be determined by an assessment of its shape compared to squares of a fixed size. The International System of Units has determined that the area of a any shape is to be determined in square meters.

Formulas for determing the area of a circle, triangle, rectangles, and squares are in place. These allow for quick calculations. For areas that have curves, the inclusion of the theories of calculus are necessary. The use of geometry is helpful in determing area also.

Formulas for Area Measurement

The most commonly used formulas for the measuring of an area are listed here.

Area (A) = Length (L) x Width (W)

Finding the area of a circle…The area of a circle can be found by multiplying 3.1416 x the radius of the circle squared.

Conventional Units

144 sq. in. = 1 square foot

9 sq. ft. = 1 square yard (sq.yd.)

Metric Units

1 square centimeter = 0.155 square inch

1 square decimeter = 10 cm x 10 cm = 100 cm(squared) = 15.5 sq. in.

1 square meter = 10 dm x 10 dm = 100 square decimeters = 10.76 sq. ft.

HVAC Measurements of Area The measurement of area is important to the field of HVAC for several reasons. The correct sizing of HVAC units must be accomplished and one of the most important factors to consider is the area that must be conditioned by the correct tonnage.

The number of British Thermal Units is also important to know to provide the area with adequate coverage. To determine the BTUs, the square footage of the location must be measured and entered into the formula.

The length and size of ducts must be determined and the first factor to consider is the area to be reached with air and the length of runs of ducts.

There are many aspects of HVACR installation, maintenance, and repair that require a comprehensive knowledge of the mathematics involved in determining line, space, mass, dimension, range, and area.