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Round pool volume
A cylinder. Halve the diameter to get the radius before squaring it.
The Formula
V = pi x radius^2 x average depth
A cylinder. Halve the diameter to get the radius before squaring it.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| V | Volume | cubic metres | Water the pool holds. |
| r | Radius | metres | Half the pool's diameter. |
| d | Average depth | metres | Depth of the water. |
What Each Symbol Means
Vcubic metres
Volume
Water the pool holds.
rmetres
Radius
Half the pool's diameter.
dmetres
Average depth
Depth of the water.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to calculate a pool volume page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Calculate A Pool Volume, filed under Everyday Life. Every number the guide produces comes from substituting into this one line.