Water Resistance Ratings of Casio Watches

Water Resistance Ratings of Casio Watches

Water resistance rating for watches is very important. This indicates states the capacity a wristwatch can be used when underwater. It is one of the most important features for any wristwatches as most people explore and travel a lot and are thus highly likely to go underwater at some point in their lives. This is also important to keep in mind for the sweats.

Casio wristwatches are water resistance but there are certain levels. They have developed and researched a lot since a long time. Their innovation is to provide the best quality possible and to allow the function and comfort while swimming or even diving.

With all the features of wristwatches, the water resistance rating may often be overlooked and misunderstood. When you see back side of your wristwatch, then there one question may arise- What on the watch saying “50M water resistance”? Actually, this simple word contains a lot of information and precautions when wearing the timepiece under water.

Unfortunately, very few of us understand what it really indicate and what their standards are meant. Here we will try to discuss a careful analysis will be explained in details about the Water Resistance in this article.

Depth by Meter of water resistance:

Before starting the different standards, Firstly, let’s look at few common questions often asked by watch owners. What does the “Meters” sign actually mean? And what activities are affected per meter listed? OK! Here is the proper explanation by Casio, and as a rule of thumb, they have explained the allowances of the watches and restrictions for each depth states.

Water Resistance Ratings
Picture Credit: casio-Intl.com

  • Water resistance: Recommended to wear when water is splashed on the watch where no pressure is placed.
  • 50m water resistance: Recommended to wear around sinks and at activities such as normal swimming, athletic sports, and at the shallow waters only. That means you can’t Snorkeling and underwater diving.
  • 100m water resistance: It is recommended to wear around sinks and simple activities such as swimming, sports, poolside diving, and snorkeling. But not for Jet skiing and scuba diving.
  • 200m water resistance: Recommended to Wear around sinks, regular swimming, sports, seating, snorkeling and most jet skiing also allowed but not scuba diving.
  • Diver’s watch: Recommended to Wear at all the above-mentioned activities and besides that scuba diving is allowed but except at instances and depths where helium gas is needed.

Depth by ATM & BARS:

BARS  refer to the pressure use on an object under water. It’s easy to remember and to convert as 1 bar is equal to 10 meters or 32 feet. In the terms of ATM is a commonly know as the short forms of Atmosphere which are referred to air pressure above water. To start with, 1 ATM is the natural pressure at sea level. 10 ATM means that the watch can resist the pressure of ten times the amount of sea level pressure without dropping to the water pressure.

As an example, If a watch is rated at 100 meters, you can go down to underwater into that distance theoretically. If your watch is rated as such, be sure to give a bit of an adjustment at the depth. Even the moving water can also create an extra pressure and for that actual result may differ.

Conversions between bars, ATM, and distance:

1 bar is equals to 1 ATM which is equals to 10 meters or 32 feet. So, we convert 10 ATM = 10 bars = 100 meters underwater, or 10 ATM = 10 bars = 320 feet underwater

Here is the quick summery-

  • 20 ATM= 200 meters or 640 feet = 20 bars
  • 30 ATM = 300 meters or 960 feet = 30 bars
  • 50 ATM = 500 meters or 1600 feet = 50 bars
  • 100 ATM = 1000 meters or 3200 feet = 100 bars


There are a lot of terms but it’s really useful if you understand concerning the standards of water resistance. Do some research if possible or just refer our above tips to take a decision in order to assess which type of watch fits best according to what you do and what you need.

If you are not familiar with all these terms, It may be confusing but knowing this terms will help you to buy the perfect wristwatch.


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