Swimming pool volume calculator
Every dose and every heating calculation starts from the volume, so it is worth getting right once.
Water volume
46 400L
- In cubic metres
- 46.400
- In US gallons
- 12 258
- In imperial gallons
- 10 207
- Surface area
- 32.00
- Perimeter
- 24.00
- Average depth
- 1.450
- Weight of the water
- 46 400
Show the working
- Pool shape = 1
- Length or diameter = 8
- Width = 4
- Shallow end depth = 1.1
- Deep end depth = 1.8
- Average depth = (1.1 + 1.8) / 2 = 1.45
- area = 1 == 1 ? 8 * 4 : 1 == 2 ? pi * (8/2)^2 : pi * (8/2) * (4/2) = 32
- In cubic metres = 32 * 1.45 = 46.4
- Water volume = 46.4 * 1000 = 46 400
- In US gallons = 46 400 / 3.785411784 = 12 257.6
- In imperial gallons = 46 400 / 4.54609 = 10 206.6
- Weight of the water = 46 400 = 46 400
- Surface area = 32 = 32
- Perimeter = 1 == 1 ? 2*(8 + 4) : 1 == 2 ? pi*8 : pi * (3*(8/2 + 4/2) - sqrt((3*8/2 + 4/2)*(8/2 + 3*4/2))) = 24
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
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The formula
- volume = surface area x average depth
- a cubic metre of water is exactly 1000 litres and weighs almost exactly 1000 kg
A sloping floor averages out to the mean of the two depths only if the slope is uniform. Odd shapes need dividing into sections.