Yes, all G-Shock watches are waterproof. More precisely, all G-Shocks are water resistant up to a depth of 200m (660ft).
The Casio G-Shock was originally designed around the 'Triple Ten' criteria: A G-Shock should survive a 10-meter fall, be water resistant up to 10 bars and have 10-year battery life.
This water resistance is enough for anything you might want to do with it:
Even if you are a recreational diver, you won't go deeper than ~70m.
In fact, most of the diving instructors I know dive with a G-Shock strapped right next to their dive computer. It's a backup in case the computer fails. And it's not the "diver" Frogman either - mostly the cheap models that they're not afraid to bang around.
In this article, we're going to take a closer look at how G-Shock's "water resistance" works, and how Casio has managed to achieve its WR20Bar water resistance.
- Casio's G-Shock Waterproof Test
- Waterproof or Water Resistant?
- More Depth = More Water Pressure
- Waterproofing F.A.Q.
Casio's G-Shock Waterproof Test
Casio loves sharing all of the abuse that they put G-Shocks through. Click play below to see the G-Shock being gradually submerged to 200m in depth with a pressure gauge:
Is G-Shock Waterproof or Water Resistant?
- Waterproof means impervious to water - like a piece of rubber, for example.
- Water resistant means able to resist the penetration of water to some degree - but not 100%.
All watches including G-Shocks are water resistant - not waterproof. That's because they only "resist" water up to a certain depth - usually 50, 100, and 200 meters. A watch can't be waterproof because...
More Depth = More Pressure
The deeper you go, the more water pressure there is in the water. To explain it in other words, all the water that's above is pushing down on the water that's below. The deeper you go, the more water you have pushing down on you.
And since you're diving with your G-Shock, all that water pressure is also pushing down on the case of the watch. Which is why the case of the watch needs to be tough. Only professional dive watches have 200m water resistance.
G-Shock Water Resistance Chart
3 ATM, 30m, 100ft, WR3bar
Suitable for everyday use. Will withstand accidental splashes but not suitable for swimming.
5 ATM, 50m, 165ft, WR5bar
Suitable for everyday use and bathing but not suitable for swimming.
10 ATM, 100m, 330ft, WR10bar
Suitable for everyday use and swimming and snorkeling but NOT suitable for high board diving or sub-aqua diving.
20 ATM, 200m, 660ft, WR20bar
Suitable for all high impact water sports and scuba diving at depths not requiring helium gas. At these depths, it is recommended to purchase a professional watch.
20 - 50 ATM, 200 - 500m
Suitable for all high impact water sports, scuba diving and saturation diving.
100 ATM, 1000m
Suitable for deep sea diving and intergalactic travels.
Changing Your Battery & Waterproofing
Be careful when changing the battery on your G-Shock. If you don't seal the caseback correctly, your watch will lose its waterproofness. If you're in doubt, let a professional do it for you.
Can You Press G-Shock Buttons Underwater?
It's safe to press G-Shock buttons underwater, as you won't be going anywhere near the maximum depth range. Your G-Shock is made to withstand that kind of pressure and it's a common myth that you can't press G-Shock buttons underwater.
What Is The Meaning Of WR20Bar on a G-Shock?
WR20bar means that the G-Shock is resistant to water under pressure up to 20 bar. A Bar is a metric unit of pressure that equals to 10m or 33ft in depth.
- WR20Bar = WR 200m = WR 660ft
Are Baby G Models Waterproof?
While all G-Shocks are water resistant to 200m, some Baby-G watches will only resist 100m. That's still enough water resistance for diving, even though it is only 50% of a G-Shock. There are many Baby-G watches that will resist the water to 100m as well.