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Pipe Volume Calculator

Pipe Volume Calculator

Pipe Dimensions

Inner Diameter




Liquid Density



Table of Content

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This Pipe volume calculator makes it possible for the plumbers and the contractors to find the volume and weight of the pipe. It is very essential to measure the volume of the water in the pipe.

How Does This Pipe Volume Calculator Work?

Follow the below-mentioned steps to use this pipe volume calculator: 


  • From the first list, select “Inner Diameter” and “Length” of Pipe
  • Next, enter the Liquid Density and choose equivalent units from the list
  • At the end, tap the calculate button to measure Capacity of Pipe


Our pipe volume calculator performs the succeeding measurements:

  • The capacity of pipe or volume of liquid in various units 
  • Choose result, according to your requirement

What is the Definition and Formula of Pipe Volume?

The volume of a pipe is equal to the volume of a liquid inside a pipe.The mass of the liquid is measured by the density formula of water inside the pipe.

But the question is, how to calculate pipe volume? We can easily calculate it with the help of volume of pipe formula:

Pipe volume=  π R^2 L’


R = Inner Diameter/2

L=Length of pipe 

Cylinder volume formula is:

Cylinder volume=  π R^2 H


H=Height of cylinder

R = Inner Diameter/2

What is Pipe Volume?

In both formula’s only difference is the “L” and “H” in both the pipe capacity calculations and it depends upon the dimension of the piping.

Relationship Between Pipe Size, Volume and Weight:

The volume of water in pipe is going to change by the diameter or radius of the pipe and by volume of the liquid pipe capacity calculations. There is an obvious difference between the 3 factors, the Diameter, Length of piping, and Density of liquid. Below are some of the real time calculations:


Pipe Size Volume Weight
mm mm3/m liters/m kg/m
6 mm 28,274 mm3 0.0283 l 0.0283 kg
8 mm 50,265 mm3 0.0503 l 0.0503 kg
10 mm 78,540 mm3 0.0785 l 0.0785 kg
15 mm 176,715 mm3 0.1767 l 0.1767 kg
20 mm 314,159 mm3 0.3142 l 0.3142 kg
25 mm 490,874 mm3 0.4909 l 0.4909 kg
32 mm 804,248 mm3 0.8042 l 0.8042 kg
40 mm 1,256,637 mm3 1.257 l 1.257 kg
50 mm 1,963,495 mm3 1.963 l 1.963 kg
65 mm 3,318,307 mm3 3.318 l 3.318 kg
80 mm 5,026,548 mm3 5.027 l 5.027 kg
100 mm 7,853,982 mm3 7.854 l 7.854 kg
125 mm 12,271,846 mm3 12.272 l 12.272 kg
150 mm 17,671,459 mm3 17.671 l 17.671 kg


Pipe Size Volume Weight
in in3/ft gallons/ft lb/ft
1/8“ 0.1473 in3 0.000637 gal 0.005323 lbs
1/4“ 0.589 in3 0.00255 gal 0.0213 lbs
3/8“ 1.325 in3 0.005737 gal 0.0479 lbs
1/2“ 2.356 in3 0.0102 gal 0.0852 lbs
3/4“ 5.301 in3 0.0229 gal 0.1916 lbs
1″ 9.425 in3 0.0408 gal 0.3407 lbs
1 1/4“ 14.726 in3 0.0637 gal 0.5323 lbs
1 1/2“ 21.206 in3 0.0918 gal 0.7665 lbs
2″ 37.699 in3 0.1632 gal 1.363 lbs
2 1/2“ 58.905 in3 0.255 gal 2.129 lbs
3″ 84.823 in3 0.3672 gal 3.066 lbs
4″ 150.8 in3 0.6528 gal 5.451 lbs
5″ 235.62 in3 1.02 gal 8.517 lbs
6″ 339.29 in3 1.469 gal 12.264 lbs

The volume of water in the pipe calculator makes it easy to find the volume and capacity of our pipelines.

Practical Example to Calculate Volume of Pipe Per Foot

In a factory site an engineer needs to estimate volume and capacity of liquid in the pipeline without exerting any extra pressure on the flow rate. The calibration of the capacity of piping is necessary to maintain a pressure and flow rate of liquids. Pipes calculations are Diameter of the whole piping is 9 Inch, and the site total measurements are around 12 Yards. The Liquid Density is 1000Kg/L due to its viscosity, and flow rate. Flow rate estimation is essential to make pressure consistent and flow rate calculators make the task easy for engineers.


The Diameter of Pipe = 9 Inch 

R= 9/2 Inch = 4.5 Inch

Length of Piping = 12 Yards

Liquid Density = 1000Kg/L


Pipe volume formula is:

Pipe volume=  π R^2 L

Pipe volume=  π [(4.5)^2 ]12

The Pipe Capacity Calculations in various units are:

Volume of liquid = 27482.65 (Cubic Inch)

The pipe volume calculator makes it easy for estimating the pipe volume.

Result in other units:

Volume 118.973 (gallons)
Volume 1.677 (cu mm)
Volume 450.36 (liters)

Weight of Liquid = 989895.19 (Lb)

Result in other units:

Weight  448932.059(kg)
Weight 449016458386.24 (mg)
Weight 44901645.839(dag)


The recommended values are measured  in good faith and are only meant for generic, informative purposes. We do not guarantee the accuracy and precision of this information. Please note, external factors may affect recommendations, For accurate results and estimation, consult a professional.


How Much Water Can a 6 Inch Pipe and 2 Feet of Length?

The 6 inches of the pipe diameter is 2.938 gallons, if the liquid density is 997 kg/m^3. You can check the volume of liquid by pipeline volume calculator.

What are 3 Ways to Calculate Volume?

Different Ways to Find Volume:

  • Solve for Volume by Space. 
  • Solve for Volume by Density and Mass. 
  • Solve for Volume by Displacement

The tubing volume calculation makes it possible to use a volume of pipe calculator.

How Do You Calculate the Volume of a Tank?

V(tank) = πr^2L

Calculate the filled volume of a horizontal cylinder tank by first finding the area, A, of a circular segment and multiplying it by the length.

How Do You Convert Cm3 to Liters?

The conversion factor is 0.001; so 1 cubic centimeter = 0.001 liters. In other words, the value in cm3 is divided by 1000 to get a value in l.


From the source of Wikipedia: Plumbing, History of Piping

From the source of Pipe Volume Gallons, Math Solutions Explained