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

Radius(cm)Inner radius(cm)Length(cm)

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

FormulaVolume = π × (Radius² − Inner radius²) × Length

With the default numbersVolume = π × (5² − 4²) × 100

AnswerVolume = 2,827.43 cm³

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

QHow 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.

QCan you walk through an example?

With Radius 5cm, Inner radius 4cm, Length 100cm, the answer is Volume 2,827.43cm³.

QWhat do I need to enter?

Enter Radius, Inner radius, Length. The result recalculates as you type, and an empty box counts as zero.

QHow 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.

QHow 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.

QAnything 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

Cube Volume CalculatorVolume and surface area of a cube from one edge.Box Volume CalculatorVolume and internal diagonal of a rectangular box.Cylinder Volume CalculatorVolume and surface area of a cylinder from radius and height.Cone Volume CalculatorVolume and slant height of a cone from radius and height.

Keep your length units consistent across inputs — mixing centimetres and metres throws results far off.