Pipe Volume Calculator
Calculate the volume of any pipe or duct quickly and accurately. Works with circular pipes, rectangular ducts, and more.
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Calculation Results
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Common Pipe Volumes
Quick reference for frequently requested pipe volumes:
1″ Pipe × 100 ft
4.08 gallons
2″ Pipe × 100 ft
16.32 gallons
1/2″ Pipe × 100 ft
1.02 gallons
Pipe Volume Reference Chart
Volume per unit length for standard pipe sizes (Schedule 40):
| Nominal Size | Inner Diameter | Gallons per Foot | Liters per Meter |
|---|---|---|---|
| 1/8″ | 0.269 in | 0.0029 | 0.036 |
| 1/4″ | 0.364 in | 0.0053 | 0.066 |
| 3/8″ | 0.493 in | 0.0098 | 0.122 |
| 1/2″ | 0.622 in | 0.0156 | 0.194 |
| 3/4″ | 0.824 in | 0.0274 | 0.340 |
| 1″ | 1.049 in | 0.0444 | 0.552 |
| 1-1/4″ | 1.380 in | 0.0769 | 0.956 |
| 1-1/2″ | 1.610 in | 0.1046 | 1.301 |
| 2″ | 2.067 in | 0.1723 | 2.143 |
| 2-1/2″ | 2.469 in | 0.2458 | 3.056 |
| 3″ | 3.068 in | 0.3792 | 4.714 |
| 4″ | 4.026 in | 0.6528 | 8.119 |
| 6″ | 6.065 in | 1.4817 | 18.430 |
Frequently Asked Questions
How do you calculate the volume of a pipe in Liters?
- Measure pipe inner diameter (d) in centimeters
- Calculate radius (r = d/2)
- Measure length (L) in centimeters
- Volume (liters) = π × r² × L ÷ 1000
How many gallons are in 100 feet of 1 inch pipe?
A standard 1-inch Schedule 40 pipe has an inner diameter of 1.049 inches. This equals approximately 4.08 US gallons for 100 feet of pipe length.
What is the volume formula for different pipe shapes?
- Circular: V = π × r² × L
- Rectangular: V = W × H × L
- Annular: V = π × (R₁² – R₂²) × L
How much water can a pipe hold?
Find the volume using this calculator, then consider that 1 cubic foot of water weighs approximately 62.4 pounds (28.3 kg) and equals 7.48 gallons (28.3 liters).
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