The weight piles up fast
Every 10 meters adds roughly another atmosphere of pressure. At the bottom, the force reaches more than 16,000 pounds per square inch.
What would that pressure do to you? →START AT THE SURFACE · END IN THE DARK
How deep
are you willing
to go?
Drag one control from warm daylight to the deepest surveyed point in the ocean. Watch sunlight vanish, pressure climb and familiar life give way to the truly strange.
CURRENT ZONE
Midnight
Bathypelagic
No sunlight
Anglerfish, gulper eels, jellies, bioluminescent hunters
APPROXIMATE TOTAL PRESSURE100.4 atmospheresEducational estimate: 1 atmosphere at the surface plus roughly 1 atmosphere per 10.06 m of seawater. Actual pressure varies with density, gravity and weather.
1,476 pounds / in²
10.17 megapascals
YOU ARE HERE · 1,000 M200 M · Twilight1,000 M · Midnight4,000 M · Abyss6,000 M · Hadal
WHAT CHANGES ON THE WAY DOWN?
One ocean.
Five different worlds.
Sunlight does not get far
Below about 200 meters, there is not enough light for meaningful photosynthesis. By 1,000 meters, sunlight is effectively gone.
What lives in each ocean layer? →Deep animals are not tiny submarines
Many avoid large gas-filled spaces and have bodies built to work under pressure. Their problem can begin when they are brought upward too quickly.
Why do deep animals glow? →METHOD
What this calculator assumes
Total atmospheres ≈ 1 + depth in meters ÷ 10.06. PSI uses 14.696 pounds per square inch per atmosphere; megapascals use 0.101325 MPa per atmosphere.
This is an educational approximation, not a dive-planning instrument. Salinity, temperature, latitude, gravity and atmospheric pressure alter the exact result.
Verify the pressure rule with NOAA Ocean Exploration ↗