Pipe Volume Calculator
Calculate cylindrical pipe volume in liters and US gallons.
Everything is calculated in your browser. Nothing you enter is sent anywhere.
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Everything is calculated in your browser.
Pipe dimensions
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About the pipe volume calculator
Calculate the internal volume of a straight cylindrical pipe from its inner diameter and length using V = π r² L, with results in liters and US gallons. Add an optional fill percentage to size a partially filled run.
How it works
Diameter and length are converted to meters, the cross-sectional area is computed from the radius, and volume is the area times length. The result then converts to liters and US gallons.
Use the inner diameter
Always enter the inner diameter (bore), not the outer or nominal pipe size. For schedule-rated pipe, check a pipe schedule chart for the actual inside diameter at your wall thickness.
Limitations
This calculator assumes a straight, uniform cylindrical bore. Elbows, reducers, valves, and other fittings add or remove volume that isn't modeled here — treat results as an estimate for a single straight run.
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All calculations run locally in your browser. Nothing you type is sent to a Dockzio server.
FAQ
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