How much does the pressure change when you are 100 feet under the water?



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    Pressure change in water varies depending on if you are in salt water or fresh water. Water pressurizes slightly more in salt water (at 9.8m) than fresh water (10m). Additionally it varies depending in where you are in the water. The pressure change at the surface increases 100%, whereas 100ft below, the pressure change from 100ft to 130ft is only 25%. But the pressure at 100ft below surface is about 400kPA.

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