How this calculator works
A round waterline has circular area; an oval waterline is modelled as a true ellipse using its full major and minor axes. Multiply by actual filled depth for a flat bottom, or the mean of two end depths for a symmetric plan with a linear bottom slope. Pool type changes the depth inputs rather than applying an arbitrary fill factor. Price is in Canadian dollars per cubic metre and excludes service charges.
Formula
Round area = pi x diameter^2 / 4; oval area = pi x major axis x minor axis / 4; in-ground average depth = (depth 1 + depth 2) / 2; V = area x water depth; fill cost = V x price per m3.
Worked example
A round pool 4 m across and filled 1 m deep holds 12.5664 m3, or about 12,566 L. An in-ground elliptical pool with 6 m and 4 m axes and depths of 1 m and 2 m holds 28.2743 m3.
Advertisement
Frequently asked questions
Should I use the advertised pool diameter?
Use the internal diameter at the waterline when available. Wall thickness and rounded corners can make advertised dimensions differ from actual capacity.
Why are two depths available only in-ground?
The above-ground model assumes a flat bottom. Choose the in-ground model when a sloping bottom can be approximated by two end depths.
Are gallons US or imperial?
The volume selector labels the gallon definition. US and imperial gallons have different sizes, so choose the one used by your supplier.