About 21.4 psi
At 300 feet of water depth the pressure is about 130 psi
35000 feet of altitude exerts more pressure on an object compared to 260 feet of water depth. This is because the pressure exerted by the atmosphere decreases as altitude increases, while the pressure exerted by water increases as depth increases.
The water pressure increases by approximately 0.43 pounds per square inch (psi) for every foot of water depth. Therefore, at 33 feet deep, the water pressure is about 14.2 psi (33 feet x 0.43 psi/foot). This is in addition to the atmospheric pressure at the surface, which is roughly 14.7 psi, bringing the total pressure to about 28.9 psi at that depth.
At a depth of 10 feet underwater, the pressure increases by approximately 0.43 pounds per square inch (psi) for every foot of depth due to the weight of the water above. Therefore, at 10 feet, the water pressure would be about 4.3 psi, in addition to the atmospheric pressure at the surface, which is approximately 14.7 psi. This results in a total pressure of roughly 19 psi at that depth.
At one atmosphere of pressure, which is approximately the pressure at sea level, the depth in fresh water is about 10.3 meters (or 33.9 feet). This is because the pressure increases by about 0.1 MPa (megapascals) for every 10 meters of water depth. Therefore, at 10.3 meters, the pressure from the water column adds an additional atmosphere to the surface pressure.
4 atmospheres is about 135.6 feet of water depth.
The pressure of water increases about 0.445 psi per foot of depth. If we "zero" our meter so we have "no" pressure at the surface (ignoring the normal 14.7 psi of air pressure at sea level), at 18 feet we will have 0.445 psi/ft times 18 feet, which is 8.01 psi, or right at about 8 psi.
Pressure and depth are related in that pressure is proportional to depth. The equation to find pressure at a certain depth is p=dgh, where p is the pressure, d is the density, g is the acceleration of gravity and h is the depth.
Water pressure increases with depth due to the weight of the water above pushing down. At 20 feet, there is twice the amount of water above compared to 10 feet, resulting in greater pressure. Specifically, water pressure increases by approximately 0.43 pounds per square inch (psi) for every foot of depth, leading to a higher total pressure at greater depths. Thus, the pressure at 20 feet is greater than at 10 feet due to this cumulative weight of the water.
The water pressure at 5000 feet depth is approximately 2200 pounds per square inch (psi). This pressure increases by 0.44 psi for every foot of depth.
Water pressure at a depth of about 44 feet is about 20psi
Water pressure increases by about 1 atmosphere for every 33 feet of depth. At 2000 feet depth, the water pressure would be about 60 atmospheres or 882 psi (pounds per square inch). This high pressure can pose significant challenges for deep-sea exploration and engineering.