what is the pressure at 25000 feet underwater

At 25,000 feet underwater, the pressure is on the order of 11,000–12,000 psi , which is roughly 750–800 times atmospheric pressure at sea level.

How to estimate the pressure

To estimate water pressure with depth, you can use this common rule of thumb for seawater: each 33 feet of depth adds about 1 atmosphere (atm) of pressure, where 1 atm ≈ 14.7 psi. So:

• Depth: 25,000 ft
• Divide by 33 ft/atm → 25,000/33≈75825{,}000/33\approx 75825,000/33≈758 atm of water pressure
• Add 1 atm from the air at the surface → ≈ 759 atm total
• Convert to psi: 759×14.7≈11,000759\times 14.7\approx 11{,}000759×14.7≈11,000 psi

So a reasonable rounded answer is:

• Pressure ≈ 11,000 psi (about 760 atm) at 25,000 feet underwater.

This is the same order of magnitude as values often quoted for depths of around 7,500 meters (which is close to 25,000 ft) in deep-ocean pressure discussions.