What Is a Watch Water Resistance Rating Guide: 30m to 300m Explained
Author: Funny Items
Release time: 2026-08-20 00:58:02
View number: 18
Depth Ratings Decoded
Water resistance ratings tell you how deep your watch can go. Here is what each rating means.
Rating Guide
| Rating | Water Contact | Swimming | Diving |
|---|---|---|---|
| 30m / 3ATM | Splash only | No | No |
| 50m / 5ATM | Light swimming | Shallow | No |
| 100m / 10ATM | Swimming | Yes | Snorkeling |
| 200m / 20ATM | All water | Yes | Recreational |
| 300m+ / 30ATM+ | All water | Yes | Professional |
Important Notes
- Ratings are lab-tested static pressure
- Real-world conditions are different
- Always screw down crown before water
- Get pressure tested every 2-3 years