Pipe Volume Calculator
Find how much water a pipe holds, in gallons, liters and cubic feet, and what the water weighs.
Change the values and press Calculate to work out your own figures.
Enter the inside diameter and the length.
Show the working
- volume = π × (inside diameter ÷ 2)² × length
How to use it
Enter the inside diameter and the length.
Lengths can be decimals, fractions or tape entries such as 12' 6 1/2" (in feet or inches). Prices are optional.
Key facts
volume = π × (inside diameter ÷ 2)² × length; 1 US gal = 231 cu in
Questions
How much water is in 50 ft of 2 in pipe?
8.16 gallons (1,885 cu in), about 68 lb.
Formulas
volume = π × (inside diameter ÷ 2)² × length; 1 US gal = 231 cu in
Sources
Limitations
- Material densities are typical values (the midpoint of the commonly published range); real loads vary with moisture, grading and compaction, so check with your supplier or type in their density.
- Tank results are the geometric volume; real tanks have wall thickness and fittings.