Pipe Volume
Gallons per foot by diameter.
Example
You enter
- Nominal Sch 40 size 1
- Length (ft) 100
You get
- Volume 4.4896
- Per foot 0.0449 gal/ft
- Cubic feet 0.6002
Checked against published worked examples from: AMTROL Inc.
Details, formula, and sources
Formula or tableV = π × (D/2)² × L. Geometric volume of a right cylinder; gallons via 1 ft³ = 7.4805 gal.
Source and editionClassical geometry; physical fact.
Free accessNIST SP 811 unit factors free at nist.gov.
What governsEstimate. AHJ and licensed plumber / gas fitter govern. Verify against the IPC / IFGC edition adopted in your jurisdiction.
API field namesnominal_size, length_ft, gallons, gallons_per_ft, cubic_feet
- Pipe inner diameter schedule-40 ID per nominal trade size from data/plumbing/pipe-properties.jsonASTM nominal pipe size