Pipe Volume Calculator
Calculate the volume of water or fluid inside a pipe by entering diameter and length.
Supports inches, feet, centimeters, and meters.
Pipe Volume
Pipe volume is calculated using the cylinder volume formula:
Volume = π × r² × L
Where r = inner radius and L = length of pipe.
Since pipe diameter is usually given as inner diameter (ID):
Volume = π × (D/2)² × L
Common pipe sizes (nominal vs actual ID):
| Nominal Size | Actual Inner Diameter |
|---|---|
| 1/2" | 0.622" |
| 3/4" | 0.824" |
| 1" | 1.049" |
| 1-1/2" | 1.610" |
| 2" | 2.067" |
Water weight:
- 1 gallon = 8.34 lbs
- 1 liter = 1 kg (2.2 lbs)
- 1 cubic foot = 7.48 gallons = 62.4 lbs
Practical uses:
- Estimating water in plumbing systems
- Calculating fluid for pipe flushing
- Determining thermal mass of hydronic heating systems
- Pool and irrigation pipe calculations