Pipe Volume Calculator

Internal volume of a round pipe from length and diameter.

Pipe Volume Calculator helps you internal volume of a round pipe from length and diameter. Enter pipe length, diameter, and wall thickness, review the breakdown, and use the guidance below to understand what the number means — and what it does not. What the Pipe volume calculator does Pipe Volume Calculator is built for arithmetic, algebra, geometry, and number tools. Internal volume of a round pipe from length and diameter. You enter pipe length, diameter, and wall thickness, then Simple Calculators computes the result instantly. Results use standard school and engineering formulas that run privately in your browser. How the math works Pick a Length unit (metres by default) and enter the Pipe length. Under Diameter type, choose Inner diameter (ID) if you know the inside width, or Outer diameter + wall to enter the outside width and the Wall thickness; the inside diameter is then outer diameter − 2 × wall thickness. The volume is π × (inside diameter ÷ 2)² × length. Only the hollow space counts, not the pipe material, and the result is also shown in litres, American gallons (3.785 litres each) and imperial (UK) gallons (4.546 litres each). The formula: V = π × (ID ÷ 2)² × L. ID is …