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At 33 feet (10 m) of seawater, what is the total pressure on a diver?

2 atmospheres, double the pressure at the surface.

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  1. 1.5 atmospheres
  2. 2 atmospheres ✔
  3. 10 atmospheres

Why: Air at the surface pushes with 1 atmosphere. Every 33 feet of seawater adds another atmosphere, so at 33 feet the total is 2, twice what you feel on the beach.

Huh, didn't know that: At 66 feet the total is 3 atmospheres, because the water adds one atmosphere every 33 feet.

The dad joke
Why did the scuba diver feel stressed at 33 feet? Twice the pressure.
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References

Answer: 2 atmospheres. Air at the surface pushes with 1 atmosphere. Every 33 feet of seawater adds another atmosphere, so at 33 feet the total is 2, twice what you feel on the beach.

  1. PADI: Diving Physics blog.padi.com/diving-physics
    At 10m / 33ft (1 ATA + 1 ATA water pressure) = 2 ATA total pressure
    Checked 2026-10-12.

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