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what is the formula for calculating liquid volume eg. I have a 7 inch diameter pipe with 1 foot of water inside. How do I calculate the amount of water in gallons?

- judy1951
**Posts:**1**Joined:**Sat Nov 11, 2006 5:26 pm

judy1951 wrote:what is the formula for calculating liquid volume eg. I have a 7 inch diameter pipe with 1 foot of water inside. How do I calculate the amount of water in gallons?

If I understand you correctly you need to calculate volume of a cylinder. It is equal to height * pi * radius squared.

In your case it is going to be (all figures in inches): 3.5*3.5*3.14*12 = 461.6 cubic inches. Here 3.5 inches is the radius (half of the diameter). 3.14 is pi number, 12 inches is the length (or height). 461.6 cubic inches equal to 2 gallons (see volume conversion page)

So the amount of water in your pipe is about 2 gallons.

- convert-me.com
- Site Admin
**Posts:**402**Joined:**Fri Sep 05, 2003 4:50 pm

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