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Understanding IP Ratings Charts: Ask the PTR Pros

The “IP” in IP ratings most commonly stands for Ingress Protection. Purists might correct you to say that it’s really International Protection markings. But Ingress Protection is a good term to use because the most common ratings are all about ingress, or how easily things get inside. Understanding IP ratings helps you know whether you can use your tools in tougher conditions.

Manufacturers love to tout IP ratings on their tools. If you know what’s you’re looking at, they’re helpful. But many Pros just assume higher numbers are better and leave it at that. We’ll break it down for you.

Quick Article Summary

  • IP = Ingress Protection or International Protection markings
  • First number = Dust Resistance
  • Second number = Water Resistance
  • See our IP ratings charts below for the full breakdown


There are usually two numbers in an IP rating. The first is a code for dust/debris ingress and the second is water/moisture. In other words, it’s how dust-proof and waterproof a tool or other product is. And yes, the higher the number, the more protection it has.

IP Rating Code Breakdown – The IP Ratings Charts

Dust Resistance – The First Number

  • 0: No rated protection
  • 1: Objects greater than 50 mm (1.97 inches)
  • 2: Objects greater than 12.5 mm (0.49 inch)
  • 3: Objects greater than 2.5 mm (0.10 inch)
  • 4: Objects greater than 1 mm (0.04 inch)
  • 5: Dust Protected – dust doesn’t get in sufficiently enough to affect operation
  • 6: Dust Tight – no dust gets in during an 8-hour test

Understanding IP Ratings

Most tools come with an IP5X rating, meaning there won’t be enough dust getting into your tool during a typical day to affect operation. But some dust can make it inside. Over time, that will build up. So for tools that are around sawdust, concrete dust, drywall dust, etc., you still need to maintain the tool. If a tool is IP6X rated, then it pretty much claims to be dust-proof for a full days work.

Water Resistance – The Second Number

  • 0: No protection
  • 1: Dripping water at a rate of 1 mm per minute for 10 minutes vertically
  • 2: Dripping water at a rate of 3 mm per minute falling at 15 degrees for 10 minutes (4 directions for 2.5 minutes each)
  • 3: Spraying water at a rate of 10 liters per minute at any angle up to 60 degrees for 10 minutes
  • 4: Splashing water similar to IPX3 test without shielding for 10 minutes
  • 5: Water jets from any direction at a rate of 12.5 liters per minute for at least 3 minutes
  • 6: Powerful water jets from any direction at a rate of 100 liters per minute for at least 3 minutes
  • 7: Immersion up to 1 meter deep for 30 minutes
  • 8: Immersion generally up to 3 meters for time agreed upon with the manufacturer
  • 9: Power high-temperature water jets at a rate of 14 – 16 liters per minute with temperature of 80 C (176 F) for 2 minutes

Understanding IP Ratings

You’ll see most tools start with an IPX4 rating and move up to IPX6. By the time you’re getting the IPX6 rating, it’s pretty tough to damage from water unless you’re leaving it out in the elements.

All you have to do now is match the IP ratings with the code. Here are a few examples:

  • IP54
    What does IP54 mean? Some dust will get in, but not enough to stop operation on a normal workday. Splashes of water will not get in and damage the tool.
  • IP56
    What does IP56 mean? Again, some dust will get in, but not enough to disrupt operation. Powerful, high-flow jets of water also won’t get in.
  • IP65
    What does IP65 mean? This is dust-proof and lower power water jets won’t make it in. But it won’t handle being submerged.


Can They Make Tools with Higher IP Ratings?

Absolutely, but you run into a couple of issues. First, power tools need to be able to dissipate heat. As this typically means they need vents, that leaves a pretty big gap for dust and water. Second, there’s the cost of developing a tool that can handle the heat and operate in those conditions. One example that pulls this off is the Nemo underwater drill.

Of course, job sites include more than just tools. You’ll see these ratings show up on storage solutions, jobsite lighting, and many other products.

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Luis Soria

VEry interesting, thanks… :)