Pipe Volume Calculator
Enter the inside diameter and length of a pipe to find how much liquid it holds and how much the water weighs.
Result
- Liters
- 61.78 L
- Cubic feet
- 2.182 cu ft
- Cubic inches
- 3,769.9 cu in
- Gallons per foot
- 0.1632 gal/ft
- Weight of water
- 135.9 lb
Formula
- Volume = π × (inner diameter ÷ 2)² × length
- 1 US gallon = 231 cubic inches
How the Pipe Volume Calculator works
A pipe is a long cylinder. Its capacity is the area of the bore times the length. Use the inside diameter, which is smaller than the nominal pipe size for most schedules.
This figure is useful for sizing expansion tanks, estimating how long a hot water line takes to run warm, and working out antifreeze or chemical doses.
Worked example
A pipe with a 2 in inside diameter and 100 ft long holds π × 1² × 1,200 = 3,769.9 cubic inches, which is 16.32 US gallons or 61.78 liters.
Frequently asked questions
How many gallons does 100 feet of 1 inch pipe hold?
About 4.08 gallons for a true 1 inch inside diameter. Each foot holds 0.0408 gallons.
Should I use the nominal or the inside diameter?
Use the inside diameter. A nominal 2 inch schedule 40 pipe has an inside diameter of 2.067 inches, and a 2 inch schedule 80 pipe is 1.939 inches.
Related calculators
- Tank Volume CalculatorCalculate the capacity of a rectangular or cylindrical tank or aquarium in gallons and liters, with the weight of the water.
- Pool Volume CalculatorCalculate how many gallons or liters of water a rectangular, round or oval pool holds from its dimensions and depths.
- Cylinder Volume CalculatorCalculate the volume and surface area of a cylinder from its radius or diameter and height, with the result in liters and gallons.
- Square Footage CalculatorCalculate square footage for rectangles, circles, triangles and trapezoids. Results in square feet, square yards, square meters and acres.
- Concrete CalculatorCalculate concrete volume in cubic yards, cubic feet and cubic meters for slabs, footings and round columns, plus the number of 40, 60 and 80 lb bags.
- Concrete Block CalculatorWork out how many concrete blocks a wall needs from its length and height, with openings and a waste allowance.
- Gravel and Stone CalculatorCalculate how much gravel, crushed stone, pea gravel or river rock you need in cubic yards and tons from the area and depth.
- Sand CalculatorEstimate how much sand you need in cubic yards and tons for a sandbox, paver bed, play area or fill, based on area and depth.
- Topsoil and Soil CalculatorCalculate cubic yards and tons of topsoil, fill dirt, compost or mulch for lawns, raised beds and gardens from the area and depth.
- Asphalt CalculatorCalculate tons of hot mix asphalt for a driveway or parking area from length, width and thickness, with adjustable density.
- Stair CalculatorCalculate the number of steps, exact riser height, total run, stringer length and stair angle from the total rise.
Related unit converters
Calculations run in your browser and nothing you enter is sent to a server. Results are provided for general information. Check critical figures independently before relying on them.