Aktualisiert July 2026

Pool Square Footage Calculator

Enter your pool's shape and dimensions to get the surface square footage you need for covers, liners, solar blankets, and resurfacing quotes.

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Einheiten

Länge

Breite

Gesamtfläche

1,938ft²

Quadratmeter

180 m²

Quadratyard

215.3 yd²

Was es bedeutet

To calculate a pool's square footage, measure the surface area of the water. For a rectangular pool, multiply length × width — a 32 ft × 16 ft pool is 512 sq ft. For a round pool, use π × radius² (radius is half the diameter). Oval and kidney pools are approximated by splitting them into shapes. This is surface area, separate from the deck or patio around the pool.

Formel & Anleitung

So wird gerechnet

Pool square footage is the surface area of the water, measured looking straight down. The shape decides the formula, so identify whether your pool is rectangular, round, or an irregular oval or kidney before you measure.

1For a rectangular pool, measure length and width in feet and multiply: area = length × width.
2For a round pool, measure the diameter, halve it to get the radius, then use area = π × radius² (π ≈ 3.1416).
3For an oval pool, treat it as a center rectangle with a semicircle on each end, then add the pieces together.
4For a kidney pool, split it into two overlapping circles or a rectangle plus curved ends and sum the areas.

Rechenbeispiel

In Zahlen

Rectangular pool (32 ft × 16 ft)	512 sq ft
Round pool (24 ft diameter, r = 12 ft)	≈ 452 sq ft
Oval pool (30 ft × 15 ft)	≈ 402 sq ft
Rectangle only, oval body (15 ft × 15 ft)	225 sq ft

A 32 ft × 16 ft rectangular pool is 512 sq ft; a 24 ft round pool is about 452 sq ft.

Genauigkeit & Annahmen

This is surface area (square footage), not water volume — volume in gallons needs depth and a different formula.
Measure at the waterline, following the pool's finished edge, not the coping or deck around it.
Irregular pools are approximated by splitting them into a rectangle plus semicircles or overlapping circles.
The deck, patio, and coping are measured separately from the pool surface as their own areas.

Wichtige Tipps & Regeln

Pool covers, safety covers, and solar blankets are sized to the surface square footage of the water.
Vinyl liners and interior resurfacing (plaster, pebble, tile) are priced by the square foot, so this figure drives quotes.
Round pool area grows with the square of the radius, so a small change in diameter changes the square footage a lot.
For oval and kidney pools, over-measuring slightly is safer — a cover that is a little large still fits, one that is short does not.

Anwendungsfälle

Für wen dieser Rechner ist

Pool covers and liners

Get the exact surface area so a winter cover, safety cover, or vinyl liner is cut to fit the water, not the deck.

Resurfacing and plaster

Interior finishes like plaster, pebble, or tile are quoted per square foot, so the surface area sets your material cost.

Solar cover sizing

Solar blankets are sold by pool dimensions — match the square footage and shape so the blanket covers the whole surface.

How to calculate the square footage of a pool

Pool square footage is the surface area of the water seen from directly above, and the formula depends entirely on the pool's shape. A rectangular pool is the easiest: measure the length and width in feet at the waterline and multiply them. A 32 ft by 16 ft pool works out to 512 square feet. Always measure the actual water edge rather than the coping or the deck, because those add area that a cover or liner should not include.

Round pools use the area of a circle: π times the radius squared. The radius is half the diameter, so a 24 ft round pool has a 12 ft radius, and 3.1416 × 12 × 12 gives about 452 square feet. Because the radius is squared, the surface area climbs quickly as the pool gets wider — a 27 ft round pool jumps to roughly 573 square feet. The calculator above handles both the rectangle and circle math, so you only enter dimensions.

Measuring oval, kidney, and irregular pools

Freeform pools rarely fit one clean formula, so the reliable approach is to break them into simple pieces. An oval pool is a center rectangle with a semicircle on each end; measure the straight middle section as a rectangle, then treat the two rounded ends together as one full circle whose diameter is the pool's width. Add those areas for a close estimate. A kidney pool can be approximated as two overlapping circles or as a rectangle with curved ends measured the same way.

For any irregular shape, sketch the pool from above and divide it into rectangles and half-circles you can measure individually. Because these are approximations, round up rather than down when the result feeds a cover or liner order. If you are also finishing the area around the water, measure the concrete deck as its own surface so the two figures stay separate.

Surface area versus the deck and patio

The pool's square footage is only the water surface. The deck, coping, and patio that surround it are separate areas, and mixing them together will oversize a cover or inflate a resurfacing quote. Measure the surrounding hardscape on its own, then combine the numbers only when you genuinely need the total footprint of the pool area.

Once you know the surface area, turning it into a budget is straightforward: multiply the square footage by the price per square foot for your liner, plaster, or cover. The cost calculator does that step for you, so you can compare quotes from resurfacing and liner installers with confidence.

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FAQ

FAQ zum Pool-Rechner

Measure the water surface. For a rectangular pool, multiply length × width — a 32 ft by 16 ft pool is 512 sq ft. For a round pool, use π × radius², where the radius is half the diameter. Oval and kidney pools are split into a rectangle plus rounded ends and added together. Measure at the waterline, not the deck.

Measure the diameter of the round pool, then divide by two to get the radius. Multiply the radius by itself and then by π (about 3.1416). A 24 ft round pool has a 12 ft radius, so 3.1416 × 12 × 12 is roughly 452 sq ft. Because the radius is squared, wider pools gain square footage quickly.

No. Square footage is the flat surface area of the water, used for covers, liners, and resurfacing. Volume is how much water the pool holds, measured in gallons, and it requires depth in the calculation. A pool with a deep end and shallow end has the same surface square footage as a flat pool of equal length and width.

No. The pool's square footage is only the water surface measured at the waterline. The deck, coping, and patio around the pool are separate areas, so measure them on their own. Combining them would oversize a cover or liner and inflate a resurfacing quote, so keep the water surface and the surrounding deck as two figures.

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