Formula and method
Volume = πr²L, with radius and length in meters. For diameter in mm, radius in meters is diameter/2,000.
Worked example
A 50 mm internal diameter over 10 m holds approximately 19.635 L when full.
Pipe Volume Calculator
Calculate the full internal capacity of a straight circular pipe using its actual bore diameter and length.
Printed from Calxy · https://www.calxy.net/other/pipe-volume-calculator
Internal pipe capacity19.6350 L
mm
0.000001 – 1000000000
m
0 – 1000000000
Internal pipe capacity
19.6350 L
- Cubic meters0.0196 m³
- US liquid gallons5.1870 US gal
A full straight circular bore of constant diameter. Use actual internal diameter rather than nominal pipe size or outside diameter. Fittings and partial filling are excluded.
How this was calculated
Radius in meters = internal diameter in mm ÷ 2,000.
Capacity = πr² × length.
Frequently asked questions
Should I enter nominal pipe size?
Use the actual internal diameter. Nominal size and outside diameter are not the same as the water-carrying bore.
Last updated . Results are estimates for informational purposes only.