G-SHOCK 200m Water Resistance

WR20BAR means the watch is water resistant to 20 bar, a marking commonly used to indicate 200-meter water resistance. The term “bar” is associated with the measurement of pressure and is related to “millibar.” A millibar is one-thousandth of a bar, meaning 1,000 millibars equals 1 bar. “Bar” comes from the Greek báros, meaning “weight.” Water pressure increases as depth increases. At sea level, air pressure is 14.7 pounds per square inch. This is called one atmosphere, and this measurement of pressure can also be used to measure water pressure. Because one atmosphere is equal to 1,013.25 millibars, or about 1.01 bar, one atmosphere and one bar are nearly equivalent units of measure. For every 33 feet (10.06 meters) of depth, water pressure increases by about one atmosphere, or roughly one bar. So, at roughly 200 meters in depth, the water pressure is about 20 bar. On a G-SHOCK watch, WR20BAR helps users identify a level of water resistance designed for active daily use, swimming, surfing, and other water-related activities. Users may also see similar markings on a G-SHOCK watch such as “WATER RESIST 20BAR,” “WATER 20BAR RESIST,” or “WR20BAR.” These abbreviations refer to the same general 20-bar water-resistance capability. For a large selection of watches with various water resistance capabilities, explore the collection of Casio water-resistant watches.

In everyday speech, many people describe G-SHOCK watches as waterproof because they are designed for use in and around water. Technically, however, the more accurate term is “water resistant.” G-SHOCK watches carry water-resistance ratings that identify the level of pressure the watch is designed to withstand. Most G-SHOCK watches feature 200-meter water resistance, making them suitable for active daily use, swimming, surfing, jet skiing, showering, rain, and other water-related activities. For scuba diving, explore a G-SHOCK FROGMAN model with ISO 200m diving water resistance. Explore G-SHOCK water-resistant digital watches.

Yes. G-SHOCK watches with 200-meter water resistance are designed for swimming and many other water-related activities. This level of water resistance helps protect the watch during active use around water, including swimming, surfing, jet skiing, showering, rain, and outdoor conditions. After exposure to salt water, chlorine, dirt, or other residue, rinse the watch with fresh water and dry it with a soft cloth to help preserve long-term performance and appearance.

For watch water-resistance ratings, 20-bar water resistance is commonly associated with 200-meter water resistance. The “20 bar” rating refers to pressure, while “200m” expresses the rating as an approximate water-depth equivalent. This does not mean every wr 20 bar watch is a professional dive watch. Standard G-SHOCK 200m water resistance is designed for active water use. While some online forums and social media posts mention the use of various G-SHOCK watch models for diving, it's recommended that you use a watch specifically designed and tested for diving such as a G-SHOCK FROGMAN with ISO 200m diving water resistance. The ISO abbreviation stands for the International Organization of Standardization, the organization that sets the standards for testing professional dive watches.

Absolutely. For water and mud resistance, explore the G-SHOCK Rangeman, the analog-digital Mudmaster, and digital Mudman collections. For water-resistant watches designed for workouts, training, or athletics, discover the G-SHOCK Move collection. For moon data and tide graph capabilities, explore G-SHOCK surf and tide watches. For the ultimate in water resistance and toughness, explore the G-SHOCK military watches collection.