Geometry & drainage
Cylindrical tank volume
- where
- tank volume (m³; the calculator shows L)
- internal diameter (m)
- water depth (m)
Explain this equation
Works out the volume of water in a round, vertical tank or cylinder. Use it for storage capacity or dosing.
d is the internal diameter. h is the depth of water. π × d² / 4 is the area of the circular base.
Volume of a cylinder is base area times height. The calculator works in m³ and shows litres.
Sense check: 0.5 m diameter with 1 m of water holds about 196 L. A 1 m depth of 1 m diameter holds about 785 L.
Watch out: this assumes flat ends and a vertical tank. Domed ends, coils and dead space below the outlet are not included.
Enter your values to see the result.
Good to know
Vertical cylinder with flat ends; excludes dished ends, coils and unusable volume.
Sources
Results are arithmetic only. Worked examples are not recommended design settings. This library does not provide automatic gas pipe selection, live gas tightness tests, purging procedures, combustion acceptance limits, installation approval or commissioning certification. Manufacturer data and the applicable current method remain essential.