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Pipe Volume Calculator — Litres, Gallons, Partial Fill, Weight & Fill Time

Editable live calculator

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No hidden assumptions. Inputs, units and the working stay visible so you can check the calculation.

Diameter input Diameter unit Inside diameter / bore Length unit Straight run length Number of identical runs Extra/equivalent length allowance (%) Volume planning only; not a hydraulic fittings-loss calculation.Liquid depth (% of inside diameter) 100 = full bore; 50 = liquid surface at the centreline.Fluid density (kg/L, optional) Use 0 to skip mass.Flow rate per run (L/min, optional) Used only for simple fill/drain time and velocity.

Calculated result

47.12 L current · 47.12 L full

100 mm calculated inside diameter · 7.854 L per metre at full bore

12.449 US gal · 10.366 Imp gal · 1.6642 ft³ full capacity

Liquid depth 100% of bore → 100% of full volume · 0 L remaining

Current fluid mass: 47.12 kg at 1 kg/L

Pipe-body material volume requires OD + wall-thickness mode.

Flow timing and velocity skipped.

Show the working

1. Use entered inside diameter = 100 mm.
2. Full-bore area = π × (0.05 m)² = 0.00785398 m².
3. Effective run length = 6 × 1 = 6 m.
4. Current volume = wetted circular-segment area × effective length × 1 = 0.0471239 m³.

Capacity model, not hydraulic sizing. Nominal pipe size can differ from actual bore; verify real ID/OD/wall data. Flow calculations ignore pressure, friction loss, compressibility and pump/system curves.

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