PoolPlanner

Ø 21 ft Round

pool plan

Family pool

A full family pool: a shallow end where kids stand and games happen, a proper deep end for diving-free swimming, and enough length that two people can swim without negotiating. This is the most-built size class in private gardens for a reason.

A round pool is the most social shape there is: everyone faces everyone, there's no deep-end hierarchy, and it drops into a small garden or courtyard without dominating it. It's the natural choice for cooling off, kids' play and spa-like plunge pools rather than lap swimming.

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6.4 m

Ø 21 ft — shown to scale

The numbers, computed

Water surface
345 sq ft
Water volume
12,349 gal (51.5 tons)
Perimeter
65′ 11″
Depth
3′ 11″–5′ 11″
Excavation approx.
94 cu yd
Fill time (garden tap)
31 hours
Skimmers needed
2×
Heat pump size
58,000 BTU/h

Figures are computed from the sampled pool outline and the plan's depths — the same geometry the 3D designer uses. Excavation includes shell and working allowance; your site conditions may differ.

Questions about this plan

How much water does a Ø 21 ft pool hold?
About 12,349 gal (51.5 tons of water) at 3′ 11″–5′ 11″ depth — computed from the actual pool outline, not a rule of thumb.
How long does it take to fill?
Roughly 31 hours from a standard garden tap (~6.6 GPM). A water delivery service fills it in a few hours.
Is this size right for my garden?
The water surface is 345 sq ft; plan roughly 1.5–2× that footprint including the surrounding deck. Open the plan in the designer and set your own deck margins to see the full footprint.
Can I change the depth or edge type?
Yes — open the plan in the designer and adjust depths, edge system (skimmer, deck-level overflow or raised), finishes and accessories freely.

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