How much water does the 6 × 3 m pool hold?

About 5,357 gal (22.4 tons of water) at 3′ 11″–5′ 3″ depth — computed from the actual pool outline, not a rule of thumb.

How long does it take to fill?

Roughly 14 hours 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 173 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.

How much does the 6 × 3 m Roman pool cost to build?

Roughly €18,000 to €51,000 installed at this size, depending on construction type — before deck, fence, landscaping, heating or permits. See the cost table above for the range per type.

6 x 3 m Roman pool

pool plan

Compact pool

A compact family size: big enough for proper swimming strokes and games, small enough that heating, covering and chemistry stay cheap. In most gardens this class hits the sweet spot between water you use daily and garden you keep.

The Roman pool pairs a rectangular body with semicircular ends, a silhouette borrowed from classical baths. You keep an honest swim lane down the middle while the ends soften the geometry and make natural places for steps — a Roman staircase flowing out of the curved end is the signature move.

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6 × 3 m — shown to scale

The numbers, computed

Water surface: 173 sq ft
Water volume: 5,357 gal (22.4 tons)
Perimeter: 50′ 7″
Depth: 3′ 11″–5′ 3″
Excavation approx.: 46 cu yd
Fill time (garden tap): 14 hours
Skimmers needed: 1×
Heat pump size: 27,000 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.

Also in US sizes: 14 × 28 ft

What a Roman end adds to a 6 x 3 m pool

The Roman end

A Roman pool is a straight run with a half circle at each end. At 6 x 3 m the two half circles have a radius of 4′ 11″, half the width, and 9′ 10″ of straight wall runs between them: that is the swim lane. Everything the shape adds sits in the two curved ends. The outline has no corner anywhere, and the curves are where a wide staircase belongs; the designer's default staircase runs 4′ 6″ out from the end wall, less than the radius, so it stays inside the curve.

What fits around it

In the designer the deck around the coping can be as narrow as 1′ 8″ on every side, and a new design starts with 7′ 3″. For this pool that makes a plot of 25 × 15 ft at the narrowest and 36 × 27 ft at the default. The curves sit inside the same 6 x 3 m box a rectangle would, so they ask for no more ground; what they leave dry is the four corners of that box, 21 sq ft between them.

Volume against a rectangle

A rectangular pool of the same size and the same depths holds 6,035 gal; this Roman pool holds 5,357 gal. The curves take away 678 gal, 11% of the rectangle's water, and the surface follows: 173 sq ft against 194 sq ft. The waterline is shorter too, 50′ 7″ against 59′ 1″, so there is less coping to lay along it, although a curved edge costs more to form and tile than a straight one.

The Roman pool and a rectangular pool of the same size and depths
Key figures	Roman	Rectangular
Water surface	173 sq ft	194 sq ft
Water volume	5,357 gal	6,035 gal
Perimeter	50′ 7″	59′ 1″

6 x 3 m rectangular pool

What it costs to build

A rough installed-cost range per construction type, at this size — the pool itself, with basic coping. Not a quote.

Construction	Installed cost	Note
Liner or membrane	€21,000–€35,000	Over a block or concrete shell; the least expensive route to any shape.
Tiled concrete	€32,000–€51,000	A poured shell finished in tile; built to any shape, the most durable finish.
One-piece fiberglass	€18,000–€30,000	Fastest to install; limited to sizes and shapes a mould exists for.

Rough 2026 estimates for the pool installed with basic coping — excavation, shell and basic equipment. Excludes deck, fencing, landscaping, heating and permits, all of which vary by site and by builder; get real bids before budgeting from these figures.

How pool cost is built up Fiberglass vs. concrete pools

Questions about this plan

How much water does the 6 × 3 m pool hold?: About 5,357 gal (22.4 tons of water) at 3′ 11″–5′ 3″ depth — computed from the actual pool outline, not a rule of thumb.
How long does it take to fill?: Roughly 14 hours 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 173 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.
How much does the 6 × 3 m Roman pool cost to build?: Roughly €18,000 to €51,000 installed at this size, depending on construction type — before deck, fence, landscaping, heating or permits. See the cost table above for the range per type.

6 x 3 m Roman pool

The numbers, computed

What a Roman end adds to a 6 x 3 m pool

The Roman end

What fits around it

Volume against a rectangle

What it costs to build

Questions about this plan

Similar pool plans

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Go on — put a pool in your garden.