**To find it, measure around the circumference of the pipe with flexible measuring tape. Divide the circumference by pi, or about 3.14159. For example, if the circumference is 12.57 inches (319 mm), you would divide by pi, and get an outside diameter of about 4 inches (100 mm).**

## How to Find Pipe Diameter?

Finding the diameter of a pipe can be a tricky endeavor for those unfamiliar with the process. Fortunately, there are a few methods you can use to accurately determine the diameter of a pipe. If youâ€™re looking for an exact measurement, youâ€™ll need to invest in a pipe-measuring tool. However, if youâ€™re in a pinch, you can use physical measurements or mathematical equations to estimate the diameter of a pipe.

The easiest way to find the diameter of a pipe is to measure it directly. To do this, youâ€™ll need a ruler or measuring tape. Measure the circumference of the pipe by wrapping the tape around the outside of the pipe. Divide the circumference of the pipe by pi (3.14). The result is the diameter of the pipe.

If you donâ€™t have a measuring tool, you can still estimate the diameter of a pipe with a few simple calculations. First, measure the length of the pipe and its width. Multiply the length by the width to get the cross-sectional area of the pipe. Divide the area by pi (3.14). The result is the approximate diameter of the pipe.

Another method for finding the diameter of a pipe is to

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