How to Read Dimensions

How to Read Dimensions
••• onairjiw/iStock/GettyImages

Dimensions in blueprints represent the size of an object in two- or three-dimensional space. For example, a dimension of a rectangular room on a blueprint, 14' 11" X 13' 10" equates to a room size of 14 feet, 11-inches wide by 13 feet, 10-inches long. Dimensions are expressed as width by length by height or depth in three-dimensional space.

Object Measurements

A three-dimensional desk for example, may be expressed as 25" X 82" X 39" which means the desk is 25 inches wide by 82 inches long and 39 inches tall. A window dimension on blueprints is treated as two-dimensional space. For example, a window that is 24 inches wide by 30 inches tall would be written as 24" X 30". In the manufacturing industry, this standard window size is referred to as a 2030 or 2 feet by 3 feet. In a rectangular swimming pool, the dimension might read 16' X 30' X 9' or 16 feet wide by 30 feet long and 9 feet deep.

Determining Dimensions

In both physics and mathematics, a dimension represents the least number of coordinates required to identify any point with in it. A line represents one dimension, whereas a square represents two dimensions and a cube applies to three-dimensional space. If an object is circular and flat, the dimensions are normally quoted in terms of a single measurable factor called the radius. The radius of a circle is the distance between its center and outer edge.

Related Articles

How to Calculate the Lineal Footage of a Circle
How to Find the Volume of a Sphere in Terms of Pi
How to Calculate Volume
What Is the Difference Between Yards & Feet?
How to Calculate Volume of a Rectangular Prism
How to Determine Square Feet Area
How to Convert Cubic Foot to Linear Foot
How to Find the Vertices of an Ellipse
The Differences Between 1D, 2D & 3D Pictures
How to Calculate the Area of a Space
How to Calculate Area From Width & Length
Scales Used in Technical Drawings
How to Calculate Circumference in Inches
What Are the Units for Diameter?
How to Calculate Average Volume
How to Calculate Linear Meters
How to Calculate Cubic Inches in a Cylinder
How to Calculate a Circular Area
How to Measure a Magnification Mirror