Explain Mattress Coil Count. Coil Spring.

Explain Coil Counts On Mattresses

June 3, 2011
In the Bedroom

Estimated reading time: 4 minutes

Today we are going to be discussing mattress coil count and what it means for your comfort.

Remember the old saying he who dies with the most toys wins? What if we applied that same thinking to the number of wire coils found inside the typical mattress? Would having more coils make up a better-quality inner mattress core? You might be surprised to learn that the old way of comparing beds does not necessarily apply to today’s mattresses. As matter of fact one bed can hardly be compared to another by coil count alone, this is due to the various coil systems available.

How To Compare Coil Counts

There used to be a time when coils were basically all built the same. These mattresses usually used a Bonnel or offset-designed coil. The difference ended up being one of a couple of things steel thickness, coil shape, number of turns in a coil, and how many were used in an industry-standard full-size bed. Today comparing coils can be tricky at best and nearly impossible at worst. Tricks include playing games knowing that people rarely ask what size the count is based on. The problem is quoting coil counts for larger mattresses means inflated coil counts due to their bigger sizes.

Today we know that more coils actually affect the beds feel more so than affect the mattress’s overall quality something that was also mentioned in Consumer Reports Magazine. The number of coils being increased usually necessitates a smaller coil in addition to thinner steel wire referred to as the gauge or thickness. All must fit inside of a mattress adding to one of the numerous factors used to measure and compare beds in addition to coil count.

Coil Type Or Kind Can Affect Mattress Coil Counts

Most people haven’t a clue what type of coil is in their mattress. Problems arise comparing coils. Examples: pocketed coils, Marshall coils, fabric-encased coils, encapsulated coils, etc. All similar coils are very comparable coils, yet as similar as they are, each is different. Some are taller, some are shorter. Others have been heated tempered once maybe even double tempered to ensure coils’ shape over time through heat treating and cooling. Others claim such a process is unnecessary if you use significantly more wire to make the coil.

Continuous wire coils have been known to quote their coils systems by the number of inches, and coil counts, while putting no focus on the number of turns a coil has from top to bottom a once widely used comparison method. Being made from one piece of wire, one coil flows for stability into the next positioning coils closer or further apart for less or more support where needed.

Tall Coil Springs: Coil height may be one of the biggest factors to determine mattress life and today they’re thick. The trick is cheaper shorter steel coils can replace taller ones by using less expensive foam to make up the height.

Vertical shot of a shock absorber coil spring isolated on a white background.

Foam encasement vs. border rods: Many of today’s mattresses use foam in place of a heavy-duty steel border rod made of generally 6-8 gauge steel. This race track edge eliminates nearly two full rows of metal coil springs and 1 or 2 border rods around the entire mattress perimeter making it hard to compare foam-encased versions to traditionally built beds.

These are really just the tip of the iceberg considering all the various kinds of coils being made but know this, Leggett and Platt makes the majority of all the steel coils that go into all mattresses today. Consumer Reports has said, “On the Whole Coil Count Doesn’t Matter”. What fails is the layers of cheap foam and padding. Personally, I have not had a coil fail in too many years to remember and offer this advice. There are just too many better ways to compare mattress quality than the number of coils it contains.

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