How much water does a 18 × 36 ft pool hold?

About 18,988 gal (79.2 tons of water) at 3′ 11″–6′ 7″ depth — computed from the actual pool outline, not a rule of thumb.

How long does it take to fill?

Roughly 2 days 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 507 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.

18 × 36 ft Oval

pool plan

Estate pool

An estate-class pool: resort presence at home, with room for swimming, play and lounging at the same time. At this size the supporting decisions matter as much as the basin — plan generous decks, a solid heat source and an automatic cover from day one, because every square metre of water is heated, treated and covered.

The oval trades corners for one continuous curve. It sits beautifully in planted, informal gardens and among period houses, and the long axis still gives a proper swimming line. Circulation is excellent because there are no corners at all for water to stall in.

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18 × 36 ft — shown to scale

The numbers, computed

Water surface: 507 sq ft
Water volume: 18,988 gal (79.2 tons)
Perimeter: 87′ 1″
Depth: 3′ 11″–6′ 7″
Excavation approx.: 144 cu yd
Fill time (garden tap): 2 days
Skimmers needed: 2×
Heat pump size: 89,000 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 18 × 36 ft pool hold?: About 18,988 gal (79.2 tons of water) at 3′ 11″–6′ 7″ depth — computed from the actual pool outline, not a rule of thumb.
How long does it take to fill?: Roughly 2 days 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 507 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.

18 × 36 ft Oval

The numbers, computed

Questions about this plan

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Go on — put a pool in your garden.