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Hexagon Pool Volume Calculator

Six sided pools are popular on timber decks and spa builds. Measure a single flat side and the water depth, and the regular hexagon formula does the rest.

Hexagon pool with the measurements needed for a volume calculation

Calculate your hexagon pool volume

1. Pick your pool shape

A six sided pool with equal sides.

2. Enter your measurements

Measure in feet or meters. You always get gallons and litres back.

3. Set your depth

This shape normally has a flat floor, so one water depth is enough.

Measure to the water line, not the top of the wall.

Your pool volume result

Pool volume

3,809 gallons

14,420 litres

Cubic feet
509 cu ft
Cubic metres
14.4 m3
Surface area
127 sq ft
Average depth
4.00 ft
Pool shape
Hexagon
How we calculated this

Shape: Hexagon. Dimensions used: Side length 7 ft. Depth: 4 ft throughout. Formula: Volume = (3 x square root of 3 / 2) x side squared x depth. Conversion: cubic feet x 7.48 = US gallons, gallons x 3.785 = litres, cubic feet x 0.0283 = cubic metres.

How the hexagon pool volume calculator works

Area is 3 times the square root of 3, divided by 2, times the side squared. That is about 2.598 times the side length squared.

Multiply the area by the water depth for cubic feet, then by 7.48 for US gallons.

The formula

Volume = (3 x square root of 3 / 2) x side squared x depth

Measure: Side length, depth.

Worked example

A hexagon with 7 foot sides has an area of 2.598 x 49, which is 127.3 square feet.

At 4 feet of water that is 509.2 cubic feet, about 3,809 gallons or 14,420 litres.

Tips before you measure

Measure one flat panel, not the distance across opposite corners.

For a stretched hexagon with two long sides, split it into a rectangle plus two triangles instead.

Hexagon pool volume FAQs

Do all six sides need to be equal?

For this formula, yes. Uneven hexagons should be split into simpler sections and added together.

How does a hexagon compare to a round pool?

A hexagon with the same width across holds slightly less water than a circle of that diameter.

Can I use metres?

Yes. Choose metres or centimetres in the unit selector and read litres in the results.

Other pool shapes

Not quite the right outline? The main pool volume calculator covers all 20 shapes with the same units and formulas.