How much water does a 8 × 3.5 m pool hold?

About 40.6 m³ (40.6 tonnes of water) at 1.2–1.8 m depth — computed from the actual pool outline, not a rule of thumb.

How long does it take to fill?

Roughly 27 hours from a standard garden tap (~1.5 m³/h). A water delivery service fills it in a few hours.

Is this size right for my garden?

The water surface is 27.5 m²; 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.

Pool plan

8 × 3.5 m Rounded rectangle · pool plan

Family pool

About this 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 rounded rectangle keeps almost all of the rectangle's swimmable water but rounds the corners into generous fillets. The result reads softer in a garden, is gentler on swimmers, and the corners no longer trap debris the way sharp ones do. It's the shape we default to in the designer.

Open in the 3D designer

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Plan view, 8 × 3.5 m — drawn to scale

The numbers, computed

Water surface: 27.5 m²
Water volume: 40.6 m³ (40,604 L)
Perimeter: 21.7 m
Depth: 1.2–1.8 m
Excavation approx.: 63 m³
Fill time (garden tap): 27 hours
Skimmers needed: 2×
Heat pump size: 15 kW

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 8 × 3.5 m pool hold?: About 40.6 m³ (40.6 tonnes of water) at 1.2–1.8 m depth — computed from the actual pool outline, not a rule of thumb.
How long does it take to fill?: Roughly 27 hours from a standard garden tap (~1.5 m³/h). A water delivery service fills it in a few hours.
Is this size right for my garden?: The water surface is 27.5 m²; 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.