Choosing the Right Bed Height

Bed height is easy to ignore right up until the moment getting into or out of bed becomes a struggle. It is not a feature anyone markets, it rarely appears on a spec sheet in a form you can use, and it changes quietly every time you swap a mattress or add a topper. It is also one of the few things about a bed you can measure yourself in about five minutes.

Two problems sit at opposite ends of the same measurement. A bed that is low for the person using it makes standing up harder — more bend in the knees and hips to unfold, more push needed through the arms. A bed that is tall for them makes getting on harder — the feet stop reaching the floor when seated, and settling in turns into a climb. Fixing one can create the other, which is why this is worth measuring rather than guessing at.

There is no single correct bed height. The useful target depends on the person's own leg length, their strength and joint mobility, the mattress and what it does under their weight, the shoes or slippers they actually wear, and how the transfer in and out is done. This guide is about finding the right height for one particular person and one particular bed.

Start by working out which direction is the problem

Before measuring anything, watch what actually happens. Getting out and getting in are different movements with different difficulties, and they point to opposite fixes. Most people who have a bed-height problem have it in one direction only — and a few discover, usefully, that the bed is awkward at both ends, which means the answer is somewhere in the middle rather than further in either direction.

What "too low" looks like

This is the better-evidenced of the two problems, and it is the one that tends to surprise people, because a low bed feels intuitively like the cautious choice.

In a 2015 biomechanics study of 12 adults over 55 with a range of strength and mobility limitations (Bloswick and colleagues, published in Work), about half of the participants could not rise from the low bed condition without assistance. The authors concluded that low bed heights posed risks for the very population they were designed for. A companion study the same year (Morse and colleagues) tested 15 adults with varied disabilities on beds at two heights and found that only 7 of the 15 could rise unassisted from the lower one.

Two things about those findings matter for how you read them. They describe small groups of people already living with strength or mobility limitations, in a hospital-bed setting — they do not predict what will happen to any individual reader, and they are not a percentage you can apply to yourself. And they describe a threshold rather than a slope: it is not that every inch lower is proportionally harder, but that below a certain height for a given person, standing up unaided stops working. In healthy young adults, a laboratory study found no significant difference in the effort required across a wide band of lower seat heights at all. The problem is capability-specific, not universal.

The mechanism is plain enough: the lower the surface, the further the knees and hips have to travel to get from sitting to standing, and the more of that work has to come from somewhere.

What "too high" looks like

Higher is not simply better. The same Morse study that found the low bed hard to rise from also found that the taller condition — a 23-inch mattress height — appeared too high for every participant to get into. Its central conclusion was that no single bed height accommodated everyone tested.

The signs are different from the low-bed ones. The feet stop making useful contact with the floor when seated on the edge, which removes the stable base that the rest of the movement depends on. Getting on involves pushing up, hopping, or scooting sideways across the mattress. The last part of sitting down becomes hard to control, because there is further to drop than expected.

That 23-inch figure is a study condition, not a ceiling. It came from one small group on hospital beds. Do not treat it as a maximum to stay under.

Measuring the bed

1. Measure from the floor to the top surface of the mattress, on the side the person actually gets in and out of. Measure the bed as it is made up and slept on, not the frame dimension from the manufacturer's website.
2. Then measure it again with the person sitting on the edge. If the mattress has a soft edge, that second figure can be a good deal lower than the first, and it is the one that describes what they are actually standing up from.
3. Note what is making up the height: frame, foundation or box spring, mattress, topper, risers, casters, adjustable-base legs. Each of those is a separate thing you might be able to change.
4. Re-measure after changing any of them. A new mattress or an added topper can move the height by several inches, which is enough to turn a bed that worked into one that does not.

A tape measure and a sensible eye are enough here. Nothing about this needs to be precise to the millimetre — you are looking for a mismatch large enough to feel, and those are not subtle.

Comparing the bed with the person who sleeps in it

A bed height only means something next to a body. The reference that health services use is the lower leg: the measurement from the floor to the back of the knee, taken sitting, with the footwear the person normally wears when getting in and out of bed. Slippers and shoes change that measurement, and bare feet at three in the morning are a different situation from shoes at nine.

Cambridge University Hospitals NHS Foundation Trust, whose occupational therapy guidance uses exactly this measurement, states the practical rule without any figure attached: make sure your knee does not come above your hip when you are sat down on the edge of the bed. That is the check to carry around. Seated on the edge, with the mattress compressed, the knees should not be forced upward, and the feet should be able to make stable contact with the floor where the person's mobility allows it.

Treat this as a practical starting reference, not a prescription. It is a way of telling whether a bed is obviously wrong for someone — it is not a clinical assessment, and it does not produce a target number to go shopping with.

Bed height check: a five-minute look at your own setup

Five things to watch, with what each one tends to indicate and what to do about it next. This is an observational walk-through, not a test, and it produces no score and no risk category.

What to change first

Change one thing at a time and re-check afterwards, because these interact. A thinner mattress lowers the bed and also changes how far the edge compresses, and both of those affect the result.

If the bed is low for the person: a removable topper that is not doing much can come off the list of things adding height in the wrong direction — but note that removing a topper lowers the bed, so this one works the other way. Going up usually means a taller foundation or frame, a thicker mattress when it is due for replacement, or the taller leg option if the base has manufacturer-supplied alternatives.

If the bed is tall for the person: start with anything removable — risers first, then a thick topper that is not earning its place. After that it is a lower-profile foundation or frame, a thinner mattress at replacement time, or a shorter manufacturer-supplied leg setting.

A note on bed risers

Risers raise a bed by putting something under each leg, and they change the geometry and the stability of the whole frame while they do it. They are only appropriate where the bed or frame manufacturer permits them and the riser itself is designed for the load and the leg or caster configuration it is carrying. Beds that are not designed for them, frames on casters, and powered bases are all situations to check carefully rather than assume. We do not recommend particular risers on this page.

Adjustable bases, and what they do not change

This is a distinction worth being clear about, because the marketing blurs it. Most consumer adjustable bases raise and lower the head and foot sections while the overall height of the frame stays exactly where it was. Bending the bed does not change how far off the floor you sit on the edge of it. Some bases do allow the height to be changed through removable or configurable legs, but that is product-specific and has to be checked model by model — our Adjustable Bed Buying Guide covers how bases are configured.

So an adjustable base does not automatically solve a bed-height problem, and raising the head of the bed is not a substitute for getting the height right. Those are two different features answering two different questions.

True vertical height adjustment — where the whole sleeping surface goes up and down — is a hospital-bed feature rather than a consumer-base one, and it is a genuinely different category of product. Our Adjustable Bed vs. Hospital Bed comparison sets out how the two differ.

What the research establishes, and what it does not

The studies behind this page measured whether people could get into or out of a bed, how much effort the movement took, and biomechanical variables like joint loading and balance. That is what they were designed to find out, and it is a genuinely useful thing to know.

The evidence is also not evenly balanced between the two directions. The difficulty of rising from a low bed is reasonably well demonstrated in people with strength and mobility limitations. The difficulty of getting onto a tall one rests on less. And all of it comes from hospital and laboratory settings — nobody has studied this in private homes. That asymmetry is worth knowing about when you weigh what you read here.

One more boundary. The research on bed height says nothing about raising the head of the bed. Head-of-bed articulation has not been shown to make getting out of bed easier, and there is evidence it gradually slides the body toward the foot of the bed. Height and articulation do not substitute for one another.

When it is worth asking a professional

Most bed-height mismatches are a measuring problem, and the sections above are enough to sort them out. Some situations are worth a second opinion from an occupational therapist, physiotherapist or clinician, who can assess the person rather than the furniture:

• A recent or rapid change in strength, balance or mobility
• Repeatedly being unable to stand up from the bed unaided
• Recovery from surgery, or a neurological condition that affects movement
• Transfers that need another person's help, or that are becoming harder for a caregiver
• Transfers involving a wheelchair, hoist or other equipment

None of that is a requirement, and most people reading this will not need it. It is a list of the situations where a measurement taken at home stops being the whole answer.