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Square inches to diameter
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Dear convert-me.com forum visitors,
Our forum has been available for many years. In September 2014 we decided to switch it to read-only mode. Month after month we saw less posts with questions and answers from real people and more spam posts. We were spending more and more resources cleaning the spam until there were less them 1 legitimate message per 100 spam posts. Then we decided it's time to stop.
All the posts in the forum will be available and searchable. We understand there are a lot of useful information and we aren't going to remove anything. As for the new questions, you can always ask them on convert-me.com FaceBook page
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Square inches to diameter
by Neonnblack » Wed Aug 31, 2011 7:31 am
I need to know the equation(and answer) of turning square inches to the OD of a pipe. It is 1.79 Sq.In. Thanks you.
- Neonnblack
Re: Square inches to diameter
by convert-me.com » Wed Aug 31, 2011 10:45 am
Neonnblack wrote:I need to know the equation(and answer) of turning square inches to the OD of a pipe. It is 1.79 Sq.In. Thanks you.
The area of a circle is pi * R^2, where pi = 3.14159 and R is the radius of the circle.
Thus, knowing the area, we can calculate the radius: R = square root of ( area / pi ). In your case R = sqrt( 1.79 / 3.14 ) = 0.755 in. And then Diameter = 2*R = 2*0.755 = 1.51 in.
Please note - in real life the pipe wall has some nonzero thickness, so inner and outer diameters of the pipe are different. If your figure 1.79 sq.in. is the area of the pipe including the pipe wall, then the formula above will give you the outer diameter (OD) of the pipe. If you figure is the area inside of the pipe (excluding the wall), then the calculation gives you the inner diameter.
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