How much water does a 4 × 2.5 m pool hold?

About 12.7 m³ (12.7 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 9.8 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

4 × 2.5 m Rounded rectangle · 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 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

Free · no signup · runs in your browser

Plan view, 4 × 2.5 m — drawn to scale

The numbers, computed

Water surface: 9.8 m²
Water volume: 12.7 m³ (12,682 L)
Perimeter: 12.1 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 4 × 2.5 m pool hold?: About 12.7 m³ (12.7 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 9.8 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.