How to Measure Mattress Sag

To measure mattress sag, first lay a flat board on top of the mattress. Then, place a measuring tape at the edge of the board and measure to the center of the mattress. The measurement you get is the amount of sag.

If your mattress is sagging more than 2 inches, it needs to be replaced.

  • Place a level across the mattress at the point where you suspect sag to be the worst
  • Check to see if the level is level from end to end
  • If not, adjust until it is
  • Measure the distance from the top of the mattress to the top of the level
  • This is your measurement of Sag
How to Measure Mattress Sag


How Do You Measure Sag in a Mattress?

There are a few different ways that you can measure sag in a mattress. The most common way is to simply sit on the edge of the mattress and then measure the distance from the top of the mattress to the bottom of your hips. Another way is to lie down on your back in the middle of the mattress and then measure the distance from your head to your feet.

Finally, you can also measure sag by putting a weight on the mattress in the middle and then measuring how much it sinks down.

How Much Sag is Acceptable in a Mattress?

When it comes to mattresses, there is no definitive answer as to how much sag is acceptable. This largely depends on personal preferences and needs. Some people may be perfectly fine with a mattress that has a slight amount of sag, while others may prefer a firmer mattress with little to no sag.

Ultimately, it is up to the individual to decide what level of firmness or softness is most comfortable for them. That being said, there are a few general guidelines that can be followed when determining if a mattress has too much sag. Firstly, take a look at the overall appearance of the mattress.

If it looks significantly lumpy or uneven, then it likely has too much sag and should be replaced. Secondly, lie down on the mattress and see how it feels. If you feel like you are sinking into the bed too much or that your spine is not properly aligned, then the mattress probably has too much sag.

Lastly, consult with a doctor or physiotherapist to see if they have any recommendations as to what type of mattress would be best for your specific needs.

How Do You Measure Dip in Mattress?

There are a few different ways that you can measure dip in your mattress. The most common way is to use a ruler or a tape measure. Place the ruler or tape measure on the bed and make sure that it is level.

Then, simply measure the depth of the dip from the top of the mattress to the bottom. Another way to measure dip is by using your body weight. Simply lie down on the bed and have someone else place their hand on your back.

They should then apply pressure until their hand sinks into the mattress about halfway. Once they have done this, they can then determine how much deeper the dip is by measuring how far their hand sank in. Of course, these are just approximate methods for measuring dip in your mattress.

If you want to be more precise, you may want to invest in a special tool called a “dipmeter.” Dipmeters are designed specifically for measuring dips in mattresses and other surfaces, and they can give you a more accurate measurement than either of the methods described above.

Can You Fix Sag in Mattress?

Most people believe that a sagging mattress is beyond repair, but this simply isn’t true. While it’s not possible to completely fix a sag, there are ways to significantly improve the support and comfort of your mattress. The first step is to identify the source of the sag.

If your mattress is old and has been well-used, it’s likely that the problem is due to normal wear and tear. In this case, you can try flipping or rotating your mattress to even out the wear. If your mattress is still under warranty, you may be able to get a replacement from the manufacturer.

If your mattress is new or otherwise in good condition, the problem may be due to an improper foundation. A foundation that’s too soft will allow your mattress to sink in, while one that’s too hard will provide insufficient support. The best way to fix this problem is to invest in a new foundation that’s specifically designed for use with your type of mattress.

This will ensure that you get optimal support and comfort. Finally, if your mattress has developed a sag due to an uneven sleeping surface, you can try using a pillow top or memory foam layer on top of it. This will help redistribute weight evenly and provide additional cushioning for increased comfort.

How to measure mattress sagging Example

Mattress Inspection Procedure

If you’ve ever wondered how those big mattress retailers keep their inventory so fresh and new-looking, it’s because they have a very strict inspection process for every single mattress that comes into the store. This process is critical to maintaining the quality of their products and protecting customers from any potential health hazards. Here’s a look at how this process works:

The first step is to visually inspect the mattress for any signs of damage or wear. This includes checking for tears, stains, or other blemishes on the surface of the mattress. If any flaws are found, the mattress is typically sent back to the manufacturer for repair or replacement.

Next, the inspector will take a closer look at the stitching and seams of the mattress. They’ll be looking for any loose threads or gaps in the stitching that could indicate a structural issue with the mattress. If anything looks amiss, the mattress will again be sent back to the manufacturer.

Finally,the inspector will use a special device to test the firmness of the mattress. This ensures that each mattress meets industry standards for comfort and support. If a mattress fails this test, it will not be sold to customers.

Now that you know what goes into inspecting a mattress before it hits store shelves, you can rest assured that your next purchase is safe and sound!


If you notice that your mattress is sagging, it’s important to measure the severity of the sag so you can decide whether or not you need to replace it. A simple way to do this is to measure the height of your mattress at the center and compare it to the height of the mattress at the edges. If the difference is more than two inches, then your mattress is significantly saggy and needs to be replaced.