Pipe Material Volume
Subtract the inner circle from the outer to get the wall cross-section, then multiply by length for material volume. The inner circle alone gives flow capacity.
Your numbers
Volume
2,827.43cm³
Litres
5.027L
Formula
Volume = π × (Radius² − Inner radius²) × Length
The second figure is the litres the pipe holds — use the first for material cost and the second for flow.
What to enter
| Input | Default | Accepted range |
|---|---|---|
| Radius (cm)Centre to edge — half the diameter. | 5 | 0 and up |
| Inner radius (cm)The smaller of two radii when the ends differ. | 4 | 0 and up |
| Length (cm)The measurement across, side to side. | 100 | 0 and up |
Step by step
Quick reference table
Results when only Radius (cm) changes and everything else stays put.
| Radius (cm) | Volume (cm³) | Litres (L) |
|---|---|---|
| 2.5 | 0 | 5.027 |
| 3.75 | 0 | 5.027 |
| 5 | 2,827.43 | 5.027 |
| 7.5 | 12,644.91 | 5.027 |
| 10 | 26,389.38 | 5.027 |
What each result means
| Result | At default values |
|---|---|
| Volume (cm³)The space a solid holds — length cubed. | 2,827.43 |
| Litres (L)Capacity in litres; one litre is 1,000 cm³. | 5.027 |
Common mistakes
The second figure is the litres the pipe holds — use the first for material cost and the second for flow.
Glossary
- Radius
- Centre to edge — half the diameter.
- Inner radius
- The smaller of two radii when the ends differ.
- Length
- The measurement across, side to side.
- Volume
- The space a solid holds — length cubed.
- Litres
- Capacity in litres; one litre is 1,000 cm³.
Frequently asked questions
Q. How is Pipe Material Volume calculated?
Volume = π × (Radius² − Inner radius²) × Length — Subtract the inner circle from the outer to get the wall cross-section, then multiply by length for material volume. The inner circle alone gives flow capacity.
Q. Can you walk through an example?
With Radius 5cm, Inner radius 4cm, Length 100cm, the answer is Volume 2,827.43cm³.
Q. What do I need to enter?
Enter Radius, Inner radius, Length. The result recalculates as you type, and an empty box counts as zero.
Q. How much does the answer move if I change a number?
Changing only Radius (cm) moves the answer to Radius (cm) 2.5 → Volume (cm³) 0 and Radius (cm) 10 → Volume (cm³) 26,389.38. The table below lays out five steps.
Q. How are the numbers rounded?
Money is shown to the nearest whole unit, percentages to one decimal place and everything else to two. What you see is rounded; the calculation itself carries the unrounded value forward.
Q. Anything to watch out for?
The second figure is the litres the pipe holds — use the first for material cost and the second for flow.
Related calculators
Keep your length units consistent across inputs — mixing centimetres and metres throws results far off.