Pipe Volume Calculator
Determine the internal capacity of any pipe or hose.
What is Pipe Volume?
The capacity of a long hollow cylinder.
Pipe volume refers to the internal capacity of a pipe—the total amount of water, gas, or other fluid it can hold when completely full.
How to Find Pipe Volume
A pipe is just a long cylinder, so use the cylinder formula with inner dimensions.
Pipe Volume Formula
The equation for internal pipe capacity.
Where 'r' is the internal radius of the pipe and 'L' is the total length.
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Frequently Asked Questions
Why use internal radius instead of outer radius?
The outer radius includes the thickness of the pipe wall, which doesn't hold liquid. The internal radius measures the actual empty space.
Does a curved pipe have a different volume?
No. Assuming the pipe isn't flattened or kinked at the bend, a curved pipe holds the same volume as a straight pipe of the exact same length.
How do I deal with long pipes where length is in meters but radius is in millimeters?
You must convert all measurements to the same unit before calculating. For example, convert millimeters to meters first.
What is 'nominal pipe size'?
Nominal pipe size (NPS) is an industrial standard that often differs from the exact physical inside diameter. Always measure the actual inside diameter for accurate volume.