Mattress Firmness Scale Data & Statistics in Canada (2026)

For sleep quality, a 2025 study published in the journal Nature and Science of Sleep compared soft, medium, and firm mattresses in a sleep lab. People on the medium mattress fell asleep faster and slept more efficiently. Sleep onset was about 7.7 minutes on the medium bed versus roughly 12 minutes on the soft one, and sleep efficiency was higher on medium (about 84%) than on soft or firm (about 77%). This was a small study of 12 healthy young adults, so treat it as one signal rather than the final word, but the direction matches the wider research.

For back pain, the landmark study is a randomized controlled trial of 313 people with chronic lower-back pain, published in The Lancet. People sleeping on a medium-firm mattress reported less pain in bed and less daytime disability than those on a firm mattress. After 90 days, the medium-firm group was about twice as likely to report improvement in pain while lying down. Medium-firm is associated with less back pain, though no mattress treats a medical condition on its own.

This is where one of the most common mattress myths falls apart. Many people assume a firmer bed is automatically better for your back. The research says the opposite for most sleepers: medium-firm, not bone-hard, tends to give the best mix of support and pressure relief. The Sleep Foundation reaches the same conclusion in its review of firm versus soft mattresses.

Preferences are still split, which is the other reason firmness is so personal. One Better Sleep Council survey found people divided almost evenly between those who want a firmer feel and those who want a softer one. The data tells you where most people land. It does not tell you where you will, which is why testing your own firmness matters more than any average.

The Best Mattress Firmness for Your Sleep Position

Your sleep position is the first thing that sets your firmness range, because it changes where your body needs to sink and where it needs to be held up.

Sleep position	Firmness range	Why
Side	4 to 6	Lets the hips and shoulders sink so the spine stays straight and joints stay off pressure
Back	6 to 7	Holds the natural curve of the lower back without letting the hips drop
Stomach	5 to 8 (lean firmer)	Stops the hips from sinking and bending the spine into a U
Combination	5 to 6	A middle feel that works as you move between positions

Side sleeping is the most common position by a wide margin. A large U.S. survey found about 69% of adults sleep mainly on their side, 19% on their back, and 12% on their stomach. That matters because side sleepers usually need a softer feel than the "firmer is better" myth suggests, so a lot of people are sleeping on beds that are too hard for them.

How adults sleep, from a large U.S. survey cited in this article.

If you want a deeper breakdown for your position, our guide to the best mattress for side sleepers covers it, and we have matching guides for back and stomach sleepers too.

How Body Weight Changes the Firmness You Need

Body weight changes how firm a mattress feels to you, which is why two people can disagree about the exact same bed. The more you weigh, the more you press into the surface, so the firmer it needs to be to hold you up.

Body weight	General range	Note
Under 59 kg (130 lbs)	2 to 5 (softer)	Lighter bodies don't press in much, so a "medium" bed can feel hard
59 to 104 kg (130 to 230 lbs)	4 to 8 by position	The standard position-based ranges apply
Over 104 kg (230 lbs)	6 to 10 (firmer)	Heavier bodies sink more, so softer beds bottom out and lose support

Most firmness charts only talk about sleep position and skip weight, which is a real gap. A lighter side sleeper might need a 3 or 4 to get any pressure relief, while a heavier side sleeper could need a 6 or 7 to avoid sinking through. Use your position to set the range, then adjust up or down for your weight. The Sleep Foundation's firmness guidance follows the same logic.

When Couples Disagree on Firmness

When two people need different firmness, a single shared mattress usually leaves both of them unhappy. One mattress-industry survey of couples found about 1 in 3 have argued about mattress firmness, and the usual fix, meeting in the middle on one feel, tends to satisfy neither partner.

From a mattress-industry survey of couples cited in this article.

A better answer is split firmness: a soft side and a firm side built into one mattress, so each person gets the feel they need. This is something we build into Fawcett mattresses, since a couple where one person sleeps on their side and the other on their stomach can be 3 or 4 levels apart on the scale.

If you and your partner are far apart on firmness, our guide to the best mattress for couples with different firmness needs walks through how split firmness works.

How to Choose the Right Firmness For You

Choosing a firmness is a short process once you know the factors. Work through them in order:

1. Start with your sleep position. Side 4 to 6, back 6 to 7, stomach 5 to 8. This sets your base range.
2. Adjust for your body weight. Lighter than 59 kg (130 lbs), shift softer. Heavier than 104 kg (230 lbs), shift firmer.
3. Factor in any pain or health needs. Most guidance for back pain, hip pain, and sciatica lands on medium-firm. Our back pain mattress guide goes deeper if that is your reason for shopping.
4. Add your own preference. Some people simply like a plusher or firmer feel. That is valid. Use it to fine-tune within your range.

The hard part is that you cannot fully judge firmness in a showroom. A 10-minute lie-down tells you very little, because your body needs a few weeks on a bed to know if the firmness is right. That gives you two ways to lower the risk.

First, use a firmness tool before you buy. Our Firmness Survey asks about your position, weight, and preferences and points you to a starting firmness. Second, choose a mattress with a real exchange policy. Fawcett backs every mattress with a 100-day Comfort Exchange, so if the firmness is not right once you have actually slept on it, you can swap to a different feel in the same model.

Does a Mattress Firmness Change Over Time?

Yes. A mattress slowly softens as it ages, which means a bed that felt right when new can lose support over the years. Mechanical testing under the European standard EN 1957 found that quality cores, both polyurethane and pocket-spring, can hold their firmness and support through long-term use. That standard measures load cycles rather than calendar years, so how long it lasts in your bedroom comes down to the materials.

Most mattresses last 7 to 10 years, and the material makes a big difference to how long firmness holds. Natural latex tends to keep its shape and support longer than synthetic foams, which break down faster. That is part of why Fawcett builds with natural Talalay latex rather than petroleum-based foam. If you want to know when a bed is past its prime, our guide on how long a mattress lasts covers the signs.

Frequently Asked Questions

What is the most popular mattress firmness?

Medium-firm, around 6 to 7 on the scale, is the most popular firmness. Industry testing suggests roughly 80% of sleepers prefer a feel in the 5 to 7 range, because it balances support and cushioning for the widest set of sleepers.

What firmness do most hotels use?

Most hotels tend to use a medium feel, around 5 to 7. A medium-firm bed appeals to the broadest range of guests, from side sleepers to back sleepers, so it is the safest single choice when one mattress has to suit everyone.

Is a firmer mattress better for your back?

No, not for most people. A randomized trial in The Lancet found medium-firm mattresses led to less back pain and disability than firm ones. Very firm beds can create pressure points and let the lower back lose its natural curve, especially for side sleepers.

How do I know if my mattress is too soft or too firm?

If you wake with lower-back ache and feel like you are sinking into a hammock, it is likely too soft. If you wake with sore shoulders or hips and pressure points, it is likely too firm. Our guide on a mattress that's too firm covers the warning signs and what to do.

Can two people get different firmness in one mattress?

Yes. A split-firmness mattress is built with a different feel on each side, so one partner can have a soft side and the other a firm side in the same bed. It is the cleanest fix when two sleepers need different support.

The Bottom Line

The mattress firmness scale runs from 1 to 10, and most people sleep best somewhere in the medium to medium-firm middle. The research backs this up: medium-firm tends to win on both sleep quality and back comfort. But your own number depends on how you sleep, what you weigh, and what your body needs, so the average is only a starting point.

The trick is matching firmness to the person instead of guessing. Fawcett Mattress is Canada's natural mattress company, and every mattress is built to order at the firmness that fits how you actually sleep, with split firmness for couples and a 100-day comfort exchange if the first choice is not quite right. If you are not sure where you land, the Firmness Survey is the fastest way to find your starting point.

Sources

1. The Effect of Mattress Firmness on Sleep Architecture (National Library of Medicine)
2. Effect of Firmness of Mattress on Chronic Non-Specific Low-Back Pain (The Lancet, PubMed)
3. Investigating Long-Term Use Influence on Mattress Firmness (MDPI, Applied Sciences)
4. Firm vs. Soft Mattress (Sleep Foundation)
5. How Long Should a Mattress Last (Sleep Foundation)
6. How the American Public Sleeps (SSRS)