Pipe volume calculator

Pipe capacity = π × inside diameter² × length ÷ 4.

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Inside diameter

Pipe length

Answer

…

Pipe capacity = π × inside diameter² × length ÷ 4.

More results

Precision and calculation record

Decimal places in numeric results and text downloads

Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

Step-by-step calculation

Inputs are substituted below. Each line evaluates the next operation; intermediate values are displayed to 12 significant digits while the calculation uses full precision.

Saved scenario

Save the current answer, then change an input to compare. This clears when you leave.

Formula and assumptions

All measurements must use the same units. Use actual inside diameter, not nominal pipe size or outside diameter.

Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.

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Updated 2026-09-26

Using Pipe volume calculator

Pipe capacity = π × inside diameter² × length ÷ 4.

All measurements must use the same units. Use actual inside diameter, not nominal pipe size or outside diameter.

Next: Sphere calculator

A worked example

With inside diameter = 4, pipe length = 10, the internal volume is 125.66370614359172.

Next: Volume calculator

Before you use the result

All measurements must use the same units. Use actual inside diameter, not nominal pipe size or outside diameter.

Example results for inside diameter

These examples use Pipe length: 10. They are reference calculations, not recommended settings.

Inside diameter	Internal volume
2	31.4159265359
4	125.663706144
8	502.654824574

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