Bed Height for Seniors: How to Find the Right Number

Geometric illustration of bed height fit

The right bed height for a senior is the one where they can sit on the edge of the mattress with both feet flat on the floor, knees bent at about 90 degrees, and stand up without a struggle. For many older adults that lands somewhere around 20 to 26 inches from the floor to the top of the mattress. But it depends on leg length, shoes, strength and the mattress itself, so the number that matters is your own. This guide shows how to find it, how to tell if a bed is wrong, and how to change the height safely.

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TL;DR

There is no one ideal height. Match the bed to the person’s lower leg length, not to a chart.
Test it: sit on the edge in usual indoor footwear, feet flat, knees near 90 degrees, then stand up without pushing hard or rocking.
A biomechanical study found medium heights of 51 to 66 cm (roughly 20 to 26 inches) worked best for unassisted transfers in the people it tested.
Raise a low bed with matching risers under every leg. Lower a too-high one by swapping the base, not by cutting legs.
If balance, joint replacements or a carer’s back are part of the picture, ask an occupational therapist to check the setup.

Why bed height matters more as we age
What numbers you will see, and what they really mean
How to measure the right bed height
Is a bed too high or too low? Signs to look for
When the conditions of the person change the answer
How to change the bed height safely
Where custom risers fit
Our perspective
FAQ
Sources

Why bed height matters more as we age

Getting out of bed is a sit-to-stand move, and it is one of the riskiest moves of the day. A 2021 paper on patient room safety notes that sit-to-stand-and-walk is the task where the most falls happen among elderly patients. At home the setting is different, but the mechanics are the same: the body has to push up from a seated position, often half asleep, often in the dark.

A bed that is too low makes your hips drop below your knees, so the legs and arms must lift most of your body weight. A bed that is too high leaves feet dangling or on tiptoe, which is a problem for balance when you slide off the edge. The same 2021 research found low bed height to be the least safe option for elderly patients getting out of bed, and recommended setting height according to lower leg length rather than using one standard figure.

What numbers you will see, and what they really mean

Search this topic and you will meet a lot of ranges: 18 to 23 inches, 20 to 23 inches, 45 to 55 cm. They are useful as a ballpark, not as a rule. Many come from retailers or home care blogs, and they assume an average-height adult in typical shoes.

The research is more careful. The biomechanical study mentioned above compared several heights and found that medium heights of 51 to 66 cm gave better stability and lower vertical ground reaction forces than higher or lower positions. That is about 20 to 26 inches. The authors also point out that their results come from healthy, younger participants, and that more research is needed on conditions such as joint replacements before anyone claims the same figure fits every older adult.

Bed height ranges compared with study findings

So treat 20 to 26 inches as the neighborhood, then fine-tune for the person.

How to measure the right bed height

You need a tape measure, a firm chair and the shoes or slippers the person actually wears in the bedroom.

Sit in the chair. Sit up straight, feet flat on the floor, knees bent to about 90 degrees, wearing usual indoor footwear.
Measure floor to the back of the knee. Hold the zero end of the tape at floor level. The Brunel University guidance on home furniture measurement says to measure from the floor to the back of the knee in exactly this posture.
Measure the bed. With the person seated on the edge of the bed, measure from the floor to the top of the mattress. Check that transfers feel safe and easy, as the same guidance advises.
Compare. The mattress top should be close to the knee-back measurement. A little above is often easier for standing, as long as feet stay flat.
Write the number down. Clinicians do this too: the AHRQ’s mobility and transfer assessment for long-term care includes marking the floor-to-bed height in inches as part of screening for fall risk.

Measure the bed with the person’s weight on it. Mattresses compress, and a soft one can sit an inch or more lower once someone sits on the edge.

A quick worked example

Say the back-of-knee measurement is 19 inches in slippers. The bed measures 17 inches with a person sitting on it. That is 2 inches too low. Adding 2 to 3 inches of lift under the legs brings the mattress to 19 or 20 inches, which keeps feet flat and puts hips level with or just above the knees.

Older man checking seated bed height

Is a bed too high or too low? Signs to look for

You can see most problems in about ten seconds of watching someone get out of bed.

Signs the bed is too low

Knees sit noticeably higher than the hips when seated on the edge.
The person rocks back and forth to build momentum, or pushes hard on the mattress with both hands.
They grab the nightstand, the headboard or a partner.
Standing up gets harder after a long night or on days with sore knees or hips.

Signs the bed is too high

Feet do not rest flat on the floor when seated on the edge.
The person has to hop or slide down to reach the floor.
They sit far back on the mattress to feel secure, which makes getting to the edge harder.
Shorter people often struggle here, especially after adding a thick topper.

A clinical improvement project reported by the British Geriatrics Society is a useful reference point. By setting bed height so hip or knee angles stayed just above 90 degrees with feet flat on the floor, the care home it describes reported a 50% decrease in bed falls. That was in a supervised care setting, so do not expect the same result at home, but the principle is the one to use: knees just under or level with hips, feet planted.

Is a 27-inch bed too high?

It depends on the person. A 27-inch mattress top is taller than most seniors’ back-of-knee measurements, so for someone of average or short stature it will usually be too high, especially once a topper adds to it. For a tall person, 27 inches may be perfectly comfortable. Do the measurement above rather than guessing: if feet are flat and the knees are near 90 degrees, the height works, and if toes are the only thing touching, it does not.

Also count the layers. Frame, box spring or foundation, mattress and topper all add up, and a new, thicker mattress is the most common reason a bed that used to work suddenly does not.

When the conditions of the person change the answer

A tape measure gives you a starting point. Health changes it.

Weak thighs or knee pain. A slightly higher bed reduces how far the body must push up, as long as feet still reach the floor.
Hip or knee replacement. Surgeons and therapists often give specific height guidance during recovery. Follow what your care team says.
Balance problems or dizziness on standing. A bed that is too high is a hazard here, because it gives a longer drop if you slip off the edge.
Carers who help with dressing or washing. Living Made Easy points out that raising the bed helps standing but can conflict with the height a carer needs to avoid back strain. Some households settle on a compromise, others move to an adjustable bed.
Spinal cord injury or similar. New South Wales health guidance notes that motorized height-adjustable beds help people keep transfers level or slightly downhill and protect the shoulders.

The Brunel guidance is explicit that you should also think about whether transfers are safe and easy, not only whether the number matches. If you are unsure, or the person has had falls, ask a doctor or occupational therapist to watch a real transfer. A nurse or physiotherapist can assess mobility and set the height, and the BGS project describes them checking and recording bed position daily in care settings.

How to change the bed height safely

Living Made Easy lists three routes: telescopic legs, bed leg raisers or an adjustable-height bed. Here is how they compare.

Option	Best for	Things to know
Bed leg risers	A bed that is 1 to 6 inches too low	Lowest cost. Must fit the leg shape and carry the full load.
Telescopic or adjustable legs	Fine tuning on frames built for it	Check the weight rating and that every leg locks.
Adjustable-height bed	Changing needs, carers, daily transfers	Highest cost. Powered, so it needs an outlet and space.
Different frame or thinner mattress	Beds that are too high	Often the only real fix for a bed that is too tall.

A few rules whichever way you go:

Raise every leg by the same amount. The guidance is to raise all legs symmetrically and use the right raiser for the leg type. A bed that tilts or rocks is worse than one that is too low.
Check the load. Add the weight of the frame, mattress, sleepers and anything stored under the bed.
Test after installing. Push on each corner and sit on the edge before anyone relies on it.
Re-measure. Sit on the edge again and confirm feet are flat.
Think about the path to the bathroom. A taller bed means a different step down to a possibly slippery floor. Good lighting and a non-slip rug edge help.

One more point on bed rails. A 2015 review of hospital bed safety suggests that side rails should be reconsidered as a way to help in-bed movement and transfers, because standard beds can be too high for some people. Talk to a clinician before adding any rail, because the right choice depends on the person.

Where custom risers fit

Most store-bought risers come in a few preset heights and suit only square, straight legs. Beds with round, tapered, angled or odd-shaped legs are where they fall short. That is the gap we built Riserman to fill.

We make 3D-printed bed risers to the exact measurements you enter, down to the hundredth of an inch, so you can aim for the number your own knee measurement gives you instead of the nearest standard size. The configurator updates the cost as you pick options. For a bed that carries a heavier load, you can add extra stability for $3.00 per riser, and a wood grain texture is $2.00 per riser. If the bed will carry more than an average load, our heavy duty risers are made for that.

Not sure how to measure the legs? Our guide on measuring furniture legs for risers covers square, round and tapered shapes, and the article on how to raise bed height walks through six methods and how to pick the inches. If you want to see the options now, start at our custom risers page.

Our perspective

We see the same story again and again: a person is told a bed should be “20 to 23 inches,” measures theirs, finds it is 18, and then discovers no riser on the shelf quite fits the legs or gives the exact lift needed. Close is not good enough for a surface someone pushes up from every morning. That is why we think the real answer to bed height is a measurement of the person, followed by a measurement of the bed, followed by a riser made to close the exact gap.

We also think the cheapest fix is often the right one. If the only problem is a bed that sits 2 or 3 inches too low, you do not need a new bed. Risers on every leg, sized precisely, solve it. If the problem is bigger than that, or involves falls, balance or a recent surgery, bring in a therapist and take their advice about the setup first. Risers are a tool, not a medical device, and we would rather you get the height right than buy anything quickly.

The same logic applies to the rest of the home. A low sofa causes the same trouble, and our post on couch risers for seniors explains how to lift one so standing is easier. If you are lifting a bed for storage as well, the piece on bed risers for under-bed storage shows how much lift you really need.

— Harris

FAQ

What is the ideal bed height for an elderly person?

There is no single ideal height. A good target is a mattress top near the back-of-knee measurement of the person in usual indoor footwear, so feet sit flat and knees bend to about 90 degrees. For many older adults that works out to roughly 20 to 26 inches. Test by sitting on the edge and standing up.

Is a high or low bed better for the elderly?

Neither extreme is good. Research on patient egress found low beds the least safe, while a bed that is too tall leaves feet off the floor and raises the risk of sliding off. A bed slightly above knee height with feet flat is usually the easiest to stand from.

How can I raise a bed that is too low?

Put matching bed leg risers under every leg, or use a frame with adjustable legs. Raise all legs by the same amount so the bed stays level, and check the weight rating. With round or angled legs, made-to-measure risers fit better than standard ones.

Should an occupational therapist check the bed height?

Yes, if there have been falls, if balance or strength is changing, or if there has been a hip or knee replacement. An occupational therapist can watch a real transfer and weigh up the risks, including those for any carer who helps. Your doctor can refer you.