Pipe Volume Calculator
Enter the pipe's inside diameter and length to estimate the amount of water the pipe can hold.
Please enter an inside diameter and pipe length greater than zero.
ESTIMATED WATER VOLUME—
Gallons—
Liters—
Volume per length—
Use the actual inside diameter when accuracy matters. Nominal pipe size is not always the same as the measured inside diameter.
Why calculate pipe volume?
Pipe volume can help estimate how much water is sitting in a long run, how much water may need to be drained before a repair, or how much stagnant water must move before hot water reaches a fixture.
Nominal size vs. actual inside diameter
Nominal pipe sizes are naming standards, not guaranteed inside measurements. Material and wall thickness can change the actual opening, so use a verified inside diameter for the best estimate.