IP68 vs 5ATM waterproof rating, which one is better?

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When shopping for a waterproof smartwatch, fitness tracker, or smartphone, you’ve likely encountered terms like "IP68" and "5ATM." Both ratings indicate water resistance, but they are measured differently and serve distinct purposes. Understanding the difference between them is crucial—especially if you plan to swim, dive, or use your device in harsh weather conditions. So, which one offers better protection?

Water resistance ratings can be confusing, as manufacturers use different standards to describe their products’ durability. IP68 is an ingress protection (IP) code that tests dust and water resistance in controlled lab conditions, while 5ATM (5 atmospheres) measures pressure resistance, simulating underwater depth. But real-world performance depends on factors like water temperature, movement, and long-term wear. Does a higher ATM rating always mean better waterproofing, or does IP68 cover more scenarios?

Choosing between IP68 and 5ATM isn’t just about picking the highest number—it’s about matching the rating to your lifestyle. A fitness enthusiast who swims daily may prioritize 5ATM, while someone who needs protection against rain, spills, and accidental drops might prefer IP68. This guide breaks down both standards, explains their limitations, and helps you decide which one is truly better for your needs.

IP68

IP68 is a standard set by the International Electrotechnical Commission (IEC) that measures the degree of protection provided by an enclosure against the ingress of solid objects, dust, and water. The first digit (6) indicates the level of protection against dust and the second digit (8) indicates the level of protection against water. The bigger the digit is, the stronger proof grade is. A device with an IP68 rating is considered dust-tight and can withstand immersion in water up to 1.5 meters deep for up to 30 minutes. Therefore, the rugged IP68 phones gained deep favor from outdoor lovers.

5ATM

5ATM, on the other hand, is a standard used by watch manufacturers to indicate the level of water resistance of their watches. Note, it's dedicated to watches, not for phones and more. 5ATM stands for "5 atmospheres" or "5 bar," which means that a watch with a 5ATM rating can withstand pressure equivalent to being submerged in water up to 50 meters deep. However, it does not necessarily mean that the watch can be used for diving or swimming at such depths. It also depends on other factors such as watch structure design, sealed design and more.

IP68 vs 5ATM Water Resistance Comparison

• Definition
  • IP68: International Protection rating for dust/water resistance (6=dustproof, 8=waterproof beyond 1m)
  • 5ATM: Indicates resistance to pressure equivalent to 50 meters depth (5 atmospheres)
• Water Resistance Level
  • IP68: Protected against continuous immersion (depth/time specified by manufacturer)
  • 5ATM: Suitable for swimming and surface water sports (not diving)
• Common Applications
  • IP68: Smartphones, rugged devices, industrial equipment
  • 5ATM: Fitness trackers, smartwatches, swim-proof wearables
• Depth Rating
  • IP68: Typically 1.5m to 3m for 30 minutes (varies by manufacturer)
  • 5ATM: Theoretical 50m depth (but real-world use limited to surface swimming)
• Movement in Water
  • IP68: Best for static immersion (not designed for water pressure from movement)
  • 5ATM: Better for dynamic water activities (swimming strokes create pressure)
• Dust/Solid Particle Protection
  • IP68: Complete dust protection (6 in IP6X)
  • 5ATM: No standardized dust protection (only water resistance specified)
• Testing Standard
  • IP68: IEC 60529 (International Electrotechnical Commission)
  • 5ATM: ISO 22810 (International Organization for Standardization)

The IP68 waterproof rating can be used into the waterproof smartphone, rugged tablet, and smartwatch and more, but 5ATM waterproof rating is just used in a watch. You can say you want to buy a 5ATM smartwatch, but you can't say you want to buy a 5ATM waterproof phone. In terms of which one is better, it depends on your needs and usage.

If you plan to use your electronic device primarily for everyday activities like showering or washing dishes, an IP68 rating should suffice. However, if you plan to use your device for swimming or water sports, a 5ATM rating may be more appropriate. If you are looking for a smart bracelet for diving on a budget, the Blackview R1 is worth hands on.