Don't know how to calculate the area of your garden or circumference of a pond? Ask your question here.
Forum rules
Dear 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 FaceBook page

Thank you for being with us and sorry for any inconveniences this could caused.


Postby slipps » Sat Jan 03, 2009 5:17 am

i have 700 linear feet of 5/8" many gallons does this hold?

Re: convert

Postby Dirtman » Mon Jan 05, 2009 12:18 pm

slipps wrote:i have 700 linear feet of 5/8" many gallons does this hold?

The formula for the volume of a cylinder is: PI * radius squared * length. I’m assuming 5/8" is the inside diameter. The volume in gallons (US) is approximately 11.16. The calculations are correct but it’s an approximation as the inside diameter of the pipe isn’t perfect and will have slight deformations along it’s length.

How I got there:

I converted to like units, using inches instead of feet, converted the diameter of 5/8 of an inch (fraction) to it’s decimal equivalent in inches, divided this diameter by 2 to get the radius and ran the formula noted above.

5 / 8 = 0.625" / 2 = 0.3125"
700 feet * 12 = 8400"

Running the formula using inches to obtain in^3:
PI * 0.3125^2 * 8400
3.1415927 * 0.097656 * 8400 = 2,577.08772 in^3

As there are 231 in^3 in a gallon (US), divide 2,577.08772 by 231 to get gallons. The precision is much more than is needed, so 11.16 gallons (US).
Posts: 574
Joined: Sat Jan 21, 2006 2:04 pm
Location: California

More info

  • List of all units you can convert online
  • Metric conversion
  • Convert pounds to gallons
  • Convert grams to cups
  • Grams to milliliters
  • Imperial vs US Customary
  • History of measurement
  • Return to Calculating things

    Our Privacy Policy       Cooking Measures Converter       Metric conversions