How much water does a 7.5 × 4.2 m pool hold?

About 27.1 m³ (27.1 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 18 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 17.9 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

7.5 × 4.2 m Kidney · 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.

The kidney is the archetypal free-form pool: one flowing bean-shaped curve with a waist that invites planting, a boulder or a slide. It blends into naturalistic landscapes better than any straight-walled shape and makes small gardens feel bigger because the eye never finds a hard boundary.

Open in the 3D designer

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Plan view, 7.5 × 4.2 m — drawn to scale

The numbers, computed

Water surface: 17.9 m²
Water volume: 27.1 m³ (27,136 L)
Perimeter: 17.9 m
Depth: 1.2–1.8 m
Excavation approx.: 42 m³
Fill time (garden tap): 18 hours
Skimmers needed: 1×
Heat pump size: 10 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 7.5 × 4.2 m pool hold?: About 27.1 m³ (27.1 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 18 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 17.9 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.