# Pipe Volume Calculator

Calculate the volume of a pipe given its inner diameter and length. The calculator will also find how much that volume of water weighs.

## How to Find the Volume of a Pipe

The volume of fluid in a pipe can be found given the inner diameter of the pipe and the length. To estimate pipe volume use the following formula:

volume = π × radius^{2} × length

Find the diameter and length of the pipe in inches or millimeters. Use our feet and inches calculator to calculate a length in inches or millimeters. To get the radius of the pipe divide the diameter by 2.

If you’re unsure what the inner diameter of a pipe is but you know the outer diameter refer to the common pipe dimensions tables to find the most likely inner diameter of your pipe.

Enter the length and radius values into the formula above to find the volume.

**Example:**For a 1″ pipe that is 50′ long

radius = 1″ ÷ 2 = .5

length = 50 × 12 = 600

volume = π × radius

^{2}× length

volume = 3.1415 × .5

^{2}× 600

volume = 3.1415 × .25 × 600

volume = 471.24 in

^{3}

## Volume and Weight of Water for Common Pipe Sizes

Pipe Size | Volume | Weight | |
---|---|---|---|

in | in^{3}/ft |
gallons/ft | lb/ft |

^{1}/_{8}“ |
0.1473 in^{3} |
0.000637 gal | 0.005323 lbs |

^{1}/_{4}“ |
0.589 in^{3} |
0.00255 gal | 0.0213 lbs |

^{3}/_{8}“ |
1.325 in^{3} |
0.005737 gal | 0.0479 lbs |

^{1}/_{2}“ |
2.356 in^{3} |
0.0102 gal | 0.0852 lbs |

^{3}/_{4}“ |
5.301 in^{3} |
0.0229 gal | 0.1916 lbs |

1″ | 9.425 in^{3} |
0.0408 gal | 0.3407 lbs |

1 ^{1}/_{4}“ |
14.726 in^{3} |
0.0637 gal | 0.5323 lbs |

1 ^{1}/_{2}“ |
21.206 in^{3} |
0.0918 gal | 0.7665 lbs |

2″ | 37.699 in^{3} |
0.1632 gal | 1.363 lbs |

2 ^{1}/_{2}“ |
58.905 in^{3} |
0.255 gal | 2.129 lbs |

3″ | 84.823 in^{3} |
0.3672 gal | 3.066 lbs |

4″ | 150.8 in^{3} |
0.6528 gal | 5.451 lbs |

5″ | 235.62 in^{3} |
1.02 gal | 8.517 lbs |

6″ | 339.29 in^{3} |
1.469 gal | 12.264 lbs |

Pipe Size | Volume | Weight | |
---|---|---|---|

mm | mm^{3}/m |
liters/m | kg/m |

6 mm | 28,274 mm^{3} |
0.0283 l | 0.0283 kg |

8 mm | 50,265 mm^{3} |
0.0503 l | 0.0503 kg |

10 mm | 78,540 mm^{3} |
0.0785 l | 0.0785 kg |

15 mm | 176,715 mm^{3} |
0.1767 l | 0.1767 kg |

20 mm | 314,159 mm^{3} |
0.3142 l | 0.3142 kg |

25 mm | 490,874 mm^{3} |
0.4909 l | 0.4909 kg |

32 mm | 804,248 mm^{3} |
0.8042 l | 0.8042 kg |

40 mm | 1,256,637 mm^{3} |
1.257 l | 1.257 kg |

50 mm | 1,963,495 mm^{3} |
1.963 l | 1.963 kg |

65 mm | 3,318,307 mm^{3} |
3.318 l | 3.318 kg |

80 mm | 5,026,548 mm^{3} |
5.027 l | 5.027 kg |

100 mm | 7,853,982 mm^{3} |
7.854 l | 7.854 kg |

125 mm | 12,271,846 mm^{3} |
12.272 l | 12.272 kg |

150 mm | 17,671,459 mm^{3} |
17.671 l | 17.671 kg |