how much does a cubic metre of sea water weigh?

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  • 1 decade ago
    Favorite Answer

    1.025 g/ml at the surface

    so 1.025 kg/ L

    1.025*1000 = 1025 kg/ m^3

    it varies depending on its temperature and salinity though.

  • 1 decade ago

    It all depends on the salinity of the water, different seas have more salt in them than others eg. The Dead Sea would obviously weigh more than the Atlantic Ocean

  • 1 decade ago

    The density of sea water at the sea surface is about 1027 kg/m3

    So the weight = 1027 kg

  • 1 decade ago

    1025kg roughly and it doesn't depend on whether there are any fish swimiing in it. Fish adjust their density, using swim bladders, so they are neutrally bouyant. A neutrally bouyant object displaces its own weight of water so the fish weighs just the same as the water it has replaced. No noticeable difference.

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  • 1 decade ago

    Average density of seawater is1025kg/m^3,but that depends on the salinity, which varies in different areas of the world.

    So it weighs 1025kg

  • 1 decade ago

    About 1020 to 1035 kilograms, depending on temperature and salinity.

  • 1 decade ago

    At 4 degrees Centigrade 1 cubic centimetre of distilled water weighs exactly 1 gram. So work it out.

  • 1 decade ago

    it depends

    if it was absolutely clear it would be about 1.025 g/ml

    if it was salt water about double that

    it also depends on temperature as cold weather is heavier than warm water

  • BioDoc
    Lv 4
    1 decade ago

    1,030 kilograms (based on its density)

  • 1 decade ago

    Depends on if there are any fish in it.

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