The weight of sea water really depends on a number of variables, including the temperature, the amount of salt (salinity) and whatever other foreign items may be present, and the depth, thus the pressure. But to get to the basic answer, seawater, at the surface, on average weighs 1027 kg/m3, or just over 64.1 lbs per cubic foot.
The question is another way of asking for density of salt water. Salt water has greater density than that of fresh water, due to the dissolved salt. Fresh water has a density of 1000 kg/cubic meter vs. an average density of 1027 kg/cubic meter for ocean salt water.
30 cubic feet of water weigh roughly 1,875 pounds.
1 cubic foot = 62 puonds
One cudic foot of water weighs 62.5 lbs.
Weight: 62.416 pounds per cubic foot at 32°F
about 62.4 pounds
That depends on how much of it you have!One pebble doesn't weigh very much, but a cubic foot of granite weighs 168 pounds! Compare that to water, which weighs about 62 pounds per cubic foot.
A cubic foot of nitrogen weighs .0784 pounds
57.41 lbs. Ice is 92% the density of water and water weighs 62.4 lbs per cubic foot. One cubic foot of water is 7.48 US gallons. George
ONE CUBIC FOOT OF CARBON DIOXIDE WILL WEIGH, 0.1144 OF A POUND.