How much water does a Ø 3.5 m pool hold?

About 12.5 m³ (12.5 tonnes of water) at 1.3–1.3 m depth — computed from the actual pool outline, not a rule of thumb.

How long does it take to fill?

Roughly 8 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 9.6 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

Ø 3.5 m Round · pool plan

Plunge pool

About this pool

This is a plunge-class pool: sized for cooling off, soaking and small-garden luxury rather than swimming laps. A uniform depth keeps the whole basin usable, heating it is quick and cheap, and it pairs beautifully with a deck-level overflow edge for a reflecting-pool look.

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.

Open in the 3D designer

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Plan view, Ø 3.5 m — drawn to scale

The numbers, computed

Water surface: 9.6 m²
Water volume: 12.5 m³ (12,468 L)
Perimeter: 11.0 m
Depth: 1.3–1.3 m
Excavation approx.: 20 m³
Fill time (garden tap): 8 hours
Skimmers needed: 1×
Heat pump size: 5 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 Ø 3.5 m pool hold?: About 12.5 m³ (12.5 tonnes of water) at 1.3–1.3 m depth — computed from the actual pool outline, not a rule of thumb.
How long does it take to fill?: Roughly 8 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 9.6 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.