Two atmospheres is 67.8 feet of water.
3 atmospheres
751.5 mmHg = 0.9888 atmospheres
10
10 feet = 3.333 yards and 120 inches.
10 atmospheres is about 340 feet of water depth.
Two atmospheres is 67.8 feet of water.
660 feet
It means 10 atmospheres. This usually indicates a watch will remain waterproof to a depth of 10 atmospheres or about 340 feet of water.
1000 atmospheres is equivalent to approximately 15,000 feet of depth in water.
One foot is a unit of distance. One atmosphere is a unit of pressure (force per unit area). 10 atmospheres is equivalent to about 21,162 lb/ft^2 (pounds per square foot). At 339 feet under water, the pressure is approximately 10 atmospheres (assuming water density is 1000 kg/m^3).
3 atmospheres
About 335 feet.
One atmosphere of pressure is approximately equal to the pressure exerted by a column of water that is 10 meters (33 feet) deep.
50 feet of water is about 1.475 atmospheres.
990 ftAdditionApproximately 958 feet for 29 atmospheres of sea water and 1 atmosphere of surface air pressure.
"ATM" stands for ATMospheres and the number before it, refers to the number of atmospheres of pressure the watch will withstand before leaking. At sea level we are all subjected to one atmosphere of pressure, because we have one atmosphere of air above us pressing down. For every 33 feet (10 metres) underwater you go, the pressure increases by 1 atmosphere. Therefore, at 33 feet underwater the pressure is 2 atmospheres (2 ATM), at 66 feet underwater the pressure is 3 atmospheres (3 ATM), etc. So 5 ATM is equivalent to 132 feet (40 metres) underwater. In conclusion, the ATM rating of a watch is the number of atmospheres of pressure the watch will withstand before breaking/leaking. To convert ATM 's into the depth rating in metres just subtract 1 and multiply by 10. eg: 5 ATM = (5 - 1)*10 = 40 metres.