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Pressure at depth

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Pressure at depth diagram
Assuming the density of sea water to be 1025 kg/m³ (in fact it is slightly variable), pressure increases by 1 atm with each 10 m of depth. Diver must alter their habits according to the pressure they experience.

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Note that this calc gives the total pressure (not just the pressure due to the water), so it includes the 1 atm ambient air pressure at sea level.
Remember that the CalcTool units menu allows you to enter and output measurements convenient for you.