Firmness Guide · Canada · Updated July 2026
Best Mattress Firmness by Sleep Position and Body Weight (Chart)
Written by Jordan Bedwell, Co-Founder at Hamuq Inc, and Artist Business Manager for Elyse Saunders. Based in Toronto, Ontario, Canada.
Reviewed by Nathan Nielson, Leadership at Hamuq focused on empowering teams, driving innovation, and delivering results through data-oriented decision-making. Based in Toronto, Ontario, Canada.
The right mattress firmness depends on two things above all: how you sleep and how much you weigh. This guide gives you a clear firmness chart that maps sleep position to body weight, explains the 1-to-10 firmness scale, and shows why the same mattress can feel different to different people. Use it as a starting point, then confirm the feel on a sleep trial. For the full buying guide, see the best mattress in Canada.
The quick answer
Most sleepers do best between 4 and 7 on a 10-point firmness scale. Side sleepers usually want a softer firmness, around 4 to 6, to cushion the shoulders and hips. Back sleepers want medium-firm, around 5 to 7, for even lumbar support. Stomach sleepers want a firmer pillow, around 6 to 8, to stop the hips sinking. Body weight then shifts this: lighter sleepers under about 130 lb should go one step softer than the baseline, and heavier sleepers over about 230 lb one step firmer, because weight changes how far you sink into the same mattress.
For reference, the medium-firm Hamuq Original Hybrid sits around 6-7 out of 10, and the firmer Hamuq Organic Hybrid around 7.5. Both come with a 120-night trial to test the feel.
The 1-to-10 mattress firmness scale, from plush to extra firm. Most sleepers land in the 4 to 7 range.
The firmness scale, explained.
Firmness is measured on a scale of 1 to 10, where 1 is the softest and 10 is the hardest, and it describes how a mattress feels on the surface, not how supportive it is underneath. This is the single most misunderstood point about mattresses: firmness and support are different. A mattress can be soft and still supportive, or firm and still unsupportive. Firmness is about feel; support is about keeping your spine aligned.
In practice, almost no one wants the extremes. Very few sleepers are comfortable at a 1 or 2, which feels like sinking into a marshmallow, or at a 9 or 10, which feels like lying on the floor. The large majority of people are happiest somewhere between 4 and 7, and the chart below narrows that down by how you actually sleep.
The mattress firmness chart
This is the core of the guide. Find your sleep position across the top and your weight down the side, and the cell gives the firmness range that suits most people in that group. Treat it as a starting point, not a rule, because comfort is individual.
| Body weight | Side sleeper | Back sleeper | Stomach sleeper | Combination |
|---|---|---|---|---|
| Lighter (under 130 lb) | 3 to 5 (softer) | 4 to 6 | 5 to 6 | 4 to 5 |
| Average (130 to 230 lb) | 4 to 6 | 5 to 7 | 6 to 8 | 5 to 6 |
| Heavier (over 230 lb) | 5 to 7 (more support) | 6 to 8 | 7 to 8 | 6 to 7 |
General guidance based on standard firmness recommendations. Ideal firmness is personal; a sleep trial is the reliable way to confirm your fit.
Firmness by sleep position
Your sleep position decides where your body presses into the mattress, which decides how much give you need there. This is the first thing to get right.
Side sleepers: softer, 4 to 6
Side sleeping concentrates your weight on the shoulder and hip, so you need a softer top layer that lets those points sink in while keeping the spine straight. Too firm, and the shoulder and hip are pushed out of alignment, which causes the numb arms and hip pain that side sleepers often report. A medium-to-medium-soft feel is the side sleeper's zone.
Back sleepers: medium-firm, 5 to 7
Back sleeping needs even support that fills the lumbar gap without letting the hips sink. Medium-firm is the classic back-sleeper range: firm enough to hold the lower back, with just enough give to follow the spine's natural curve. This is also the safest range for most people with back pain.
Stomach sleepers: firmer, 6 to 8
Stomach sleeping is the position that most needs firmness, because a soft mattress lets the belly and hips sag, arching the lower back. A firmer surface keeps the hips level with the shoulders. If you sleep this way and have back pain, a firmer mattress helps, and gradually shifting toward back or side sleeping helps more.
Combination sleepers: medium, 5 to 6
If you change position through the night, aim for the middle. A medium feel is responsive enough to move on without feeling stuck, and versatile enough to work reasonably in every position. Look for a mattress that responds quickly rather than one you sink deep into.
Firmness by body weight
Weight is the factor most simple charts skip, and it changes everything, because firmness is a feel and a heavier body compresses a mattress more. The same mattress genuinely feels softer to a heavier person and firmer to a lighter one. This is why a couple with different builds can disagree so completely about the same bed.
Lighter sleepers, under about 130 lb
Lighter bodies do not sink into a mattress as far, so a medium-firm mattress can feel hard to them. Lighter sleepers generally want to go about one step softer than the baseline for their position, so the surface actually contours. A firm mattress that never gives is a common complaint for lighter people.
Average sleepers, about 130 to 230 lb
This is the range most mattresses are designed and rated for, so the baseline recommendation for your sleep position usually applies directly. The chart figures in the average row are the default starting point.
Heavier sleepers, over about 230 lb
Heavier bodies compress a mattress more and sink further, so they generally want about one step firmer than the baseline, plus strong support underneath to avoid bottoming out. Support matters as much as surface firmness here: a heavier sleeper needs a mattress with a robust support core, which is where sturdy hybrids tend to suit better than soft all-foam beds.
Hamuq owner data
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How we know this: [INSERT METHOD once real data exists, e.g. "Based on N verified Hamuq owner responses by weight band, collected between [month] and [month] 2026, compiled by Jordan Bedwell." Do not fabricate.]
Firmness for couples with different needs
When two people of different weights or sleep positions share a bed, the honest answer is compromise, and there are three realistic routes. The simplest is to meet in the middle at a medium-to-medium-firm feel, around 5 to 6, which works reasonably well for most pairings. The second is a mattress with good pressure relief and a responsive surface, which tends to satisfy a wider range of bodies than a very soft or very firm one.
The third route, if the mismatch is large, is a split-firmness setup or two toppers, though that adds cost and complexity. For most couples, a quality medium-firm mattress with a real trial is the practical answer, because the trial lets you both judge it at home rather than guessing in a showroom.
The cold-room factor Canadian sleepers should know.
One thing no firmness chart captures: temperature changes how firm a foam mattress feels. Comfort and memory foam get softer when warm and firmer when cold, so that the same mattress can feel a step harder in a cool Canadian bedroom or when it is first unboxed in winter than it will once it is warmed to body temperature. If a new mattress feels firmer than its rating suggests, the room temperature may be part of the reason. We cover this in detail in our guide on softening a too-firm mattress.
Where Hamuq sits on the firmness scale
Hamuq builds toward the medium-firm middle, the range that suits the widest range of sleepers. The Original Hybrid ($999 CAD queen) sits around 6 to 7 of 10, medium-firm, which lands in the sweet spot for back sleepers, combination sleepers, and average-weight side sleepers who want support with some give. The Organic Hybrid ($1,999 CAD queen) is firmer at around 7.5, which suits heavier sleepers, stomach sleepers, and anyone who prefers a firmer surface.
Because firmness is personal and shifts with weight and position, the number on the scale only gets you so far. Both Hamuq mattresses come with a 120-night trial, which is the real test: several weeks on the mattress in your own room tell you far more than any firmness rating can.
Possible downside: Hamuq does not currently offer a plush, sub-4 soft option, so a lighter side sleeper who wants a deep-sink, cloud-like feel may find even the Original Hybrid firmer than ideal, and could pair it with a soft topper or look elsewhere for that specific feel. Use the chart honestly against your own weight and position before deciding. Compare both in the Hamuq lineup.
Find your starting firmness:
- Average-weight side sleeper: medium, 4 to 6. Test the Original Hybrid with the trial.
- Back or combination sleeper: medium-firm, 5 to 7. The Original Hybrid lands here.
- Stomach sleeper or heavier build: firmer, 6-8. Consider the Organic Hybrid.
- Lighter side sleeper wanting plush: go softer than baseline, or add a soft topper.
Medium-firm, tested on your own body
A firmness rating is a starting point. A 120-night trial is the real answer. Try a Hamuq hybrid at home and return it free if the feel is not right.
Frequently asked questions
What mattress firmness is best for side sleepers?
Most side sleepers do best around 4 to 6 on the firmness scale, a medium-to-medium-soft feel. This lets the shoulder and hip sink in enough to keep the spine straight while still supporting the waist. Lighter side sleepers can go a step softer, and heavier side sleepers a step firmer for more support.
How does body weight affect mattress firmness?
Body weight changes how far you sink, so the same mattress feels softer to a heavier person and firmer to a lighter one. As a rule, lighter sleepers under about 130 lb should choose one step softer than the baseline for their position, and heavier sleepers over about 230 lb one step firmer, with strong support underneath. This is why weight matters as much as sleep position.
What is the best firmness for back pain?
Medium-firm, around 5 to 7, is the usual recommendation for back pain, not the firmest option. It supports the lower back while still following the spine's natural curve. The right point within that range shifts with your weight and position, and a sleep trial is the reliable way to confirm it.
Is a firmer or softer mattress better?
Neither is universally better; it depends on your sleep position and weight. Side sleepers generally need softer, stomach sleepers firmer, and back sleepers in between, with body weight shifting each of these. Firmness is distinct from support, so a good mattress provides the right feel and keeps your spine aligned.
What firmness is medium-firm on the scale?
Medium-firm is roughly 6 to 7 on the 1-to-10 firmness scale. It is the most popular range because it suits the widest set of sleepers, offering support with a little give. Both the sweet spot for back and combination sleepers and a safe default when you are unsure, medium-firm is where many mattresses, including the Hamuq Original Hybrid, are built.
Why does my mattress feel firmer than its rating?
A few reasons: a new mattress is at its firmest before it breaks in, a cool room stiffens the foam so the bed feels harder than its rating suggests, and your body may be adjusting to an older, softer mattress. Give a new mattress a few weeks, warm the room, and the feel usually settles closer to its rated firmness.
The bottom line
Start with your sleep position, then adjust for your weight: side sleepers, softer at 4 to 6; back sleepers, medium-firm at 5 to 7; stomach sleepers, firmer at 6 to 8, with lighter sleepers going a step softer and heavier sleepers a step firmer. Remember that firmness is a personal feel, separate from support, and that a cold room can make any foam mattress feel harder. Use the chart as your starting point, then confirm with a sleep trial. To put it into practice, compare the Original Hybrid with the full lineup of best mattresses in Canada.
About the authors
Written by Jordan Bedwell, Co-Founder at Hamuq Inc, and Artist Business Manager for Elyse Saunders. Based in Toronto, Ontario, Canada.
Reviewed by Nathan Nielson, Leadership at Hamuq focused on empowering teams, driving innovation, and delivering results through data-oriented decision-making. Based in Toronto, Ontario, Canada.
Sources and references. Firmness ranges reflect standard mattress-industry recommendations by sleep position and body weight; individual comfort varies, so treat the chart as a starting point and confirm with a trial. On medium-firm feel and back comfort: Kovacs FM et al., "Effect of firmness of mattress on chronic non-specific low-back pain," The Lancet, 2003, PubMed 14630439—product specifications from the Hamuq spec sheet.
Prices in Canadian dollars (CAD), verified July 2026, subject to change.