Water Pressure Calculator
Calculates the pressure at a specific water depth, or the depth for a specific pressure. One meter of water has a pressure of 0.0980665 bar. Thus, 100 meters of water depth has a pressure of 9.80665 or almost 10 bar. The normal air pressure at sea level is 1.013 bar, which is added to the water pressure or not, depending on what you want to calculate.
| Water depth: | meters |
| Water pressure: | bar |
Round to decimal places
Please simply enter a value for water depth and water pressure to calculate the other value. Whether the air pressure is taken into account depends on the exact case. If the ambient pressure is required, then the air pressure is included; if you only want to know the difference between pressure at depth and on the surface or between two depths, then not. For a depth difference, the difference between two depths can be entered.
Put simply, the water pressure increases by one bar every ten meters. The unit bar (often also used as millibar) is actually outdated, but is still regularly used for water pressure. The SI unit for pressure is Pascal. One bar or one thousand millibars corresponds to one hundred thousand Pascal or one hundred kilopascals or one thousand hectopascals.
The water pressure is an important information for divers, in order to avoid the dangerous decompression sickness. However, it is not just the difference in pressure between the deepest point and the surface that is important, but also the time it takes to dive up. For this, see diving courses and specialist literature.
In addition to the water pressure caused by the water column above, i.e. by the depth of the water, pressure can also be generated by pumps. Here, only the pressure caused by the water depth can be calculated.
Physics commonly uses SI units. Here is a calculator to convert lengths, temperature, pressure, speed and other units.