Introduction
Raised toilet seat height can make a significant difference to how easily a senior sits down and stands up from the toilet.
If the toilet is too low, the user may need more leg strength to lower themselves and stand again. However, simply choosing the tallest raised toilet seat is not automatically safer.
If the final seat becomes too high, the senior may struggle to keep both feet securely on the floor, feel unstable while sitting or slide forward when preparing to stand.
The correct setup depends on the senior’s height, leg length, strength, balance, existing toilet height, footwear, arm support and bathroom layout.
This guide explains seven practical checks New Zealand seniors and families can use when choosing between common raised toilet seat heights such as 50mm, 100mm and 150mm.
Safety Note
A raised toilet seat is only one part of a safe toilet transfer.
Professional assessment may be appropriate when the senior:
- Has fallen in the bathroom
- Has repeated near-falls
- Needs another person to lift or lower them
- Has significant weakness on one side
- Uses a wheelchair for transfers
- Cannot keep both feet supported
- Has severe hip or knee pain
- Has recently had surgery
- Has rapidly changing mobility
- Has difficulty controlling the movement when sitting
- Becomes dizzy when standing
- Needs a specialist commode or toileting system
An occupational therapist, physiotherapist or other appropriate healthcare professional can assess the person, toilet height, support rails and complete transfer movement together.
Disclosure
This article may contain affiliate links in the future. If you buy through these links, Golden Vibe may earn a commission at no additional cost to you.
Golden Vibe has not personally fitted every raised toilet seat available in New Zealand.
Always check the current manufacturer or retailer specifications, toilet compatibility, weight capacity and installation instructions before buying.
Quick Answer
The right raised toilet seat height is the height that allows the senior to sit comfortably with both feet securely supported while reducing the effort needed to sit down and stand up.
Health New Zealand notes that raised toilet seats commonly come in heights from around:
- 50mm or 2 inches
- 100mm or 4 inches
- 150mm or 6 inches
However, the highest option is not automatically the best.
The correct height depends on:
- The senior’s leg length
- Existing toilet height
- Strength
- Balance
- Foot position
- Transfer technique
- Whether armrests or grab bars are used
Always evaluate the final toilet height rather than the raised seat in isolation.
The 7 Main Raised Toilet Seat Fit Checks
| Fit Check | What to Check | Why It Matters |
|---|---|---|
| 1. Added height | 50mm, 100mm, 150mm or another option | Determines the final sitting position |
| 2. Foot support | Both feet should remain secure | Helps stability and standing |
| 3. Sit-to-stand movement | Senior can lower and rise comfortably | Confirms the height actually helps |
| 4. Toilet compatibility | Seat fits the actual bowl securely | Prevents movement or rocking |
| 5. Arm support | Arms, rails or toilet frame if needed | Affects transfer control |
| 6. Bathroom clearance | Enough space beside and in front | Prevents equipment conflicts |
| 7. Stability and capacity | Secure fitting and correct weight limit | Essential for safe everyday use |
1. Start With the Existing Toilet Height
Before choosing a raised toilet seat, measure the toilet that is already installed.
Measure from the finished bathroom floor to the top surface of the existing toilet seat.
Do not measure only the ceramic toilet bowl.
The existing toilet seat contributes to the final sitting height.
Record the measurement.
Then consider how much extra height is actually required.
For example, if the existing toilet already feels only slightly low, a 50mm raise may be enough.
If the senior has considerably more difficulty lowering and standing, a larger increase may be worth considering.
However, the final decision should be based on the senior’s actual sitting position rather than the amount of extra height alone.
2. Check Whether Both Feet Stay Supported
This is one of the most important checks.
Health New Zealand advises that toilet equipment should be adjusted so the person can sit comfortably with their feet flat on the floor.
When the senior sits on the final raised toilet seat, check whether:
- Both feet contact the floor
- The whole foot is supported rather than only the toes
- The knees remain in a comfortable position
- The senior does not slide forward
- The pelvis feels stable
- The senior can move the feet into a good standing position
If the feet are left dangling or only the toes reach the floor, the seat may be too high.
A higher seat can reduce the distance needed to stand, but it should not sacrifice stable foot contact.
3. Check the Sit-to-Stand Movement
The purpose of increasing toilet height is usually to make the transfer easier.
Test the complete movement.
Ask the senior to:
- Approach the toilet normally.
- Turn into position.
- Reach for appropriate support if used.
- Lower themselves slowly.
- Sit comfortably.
- Position both feet.
- Lean forward appropriately.
- Stand again.
- Regain balance before moving away.
Observe the entire process rather than only the moment of standing.
A good raised toilet seat should reduce unnecessary effort without creating a new stability problem.
Signs the Toilet May Still Be Too Low
The final toilet height may still be too low if the senior:
- Drops heavily onto the seat
- Struggles during the first part of standing
- Rocks several times to gain momentum
- Pushes very heavily through the arms
- Pulls hard on nearby furniture
- Needs another person to lift them
- Avoids using the toilet because standing is difficult
- Experiences increased knee or hip discomfort
A low surface usually requires greater leg effort.
Adding some height may help, but height alone may not solve significant weakness or balance problems.
Signs the Raised Toilet Seat May Be Too High
The seat may be too high if:
- Both feet cannot rest securely on the floor
- Only the toes reach the floor
- The senior slides forward
- Pressure develops behind the thighs
- The user feels unstable while seated
- It becomes difficult to position the feet before standing
- The toilet feels more like climbing onto a high stool
Do not assume that a taller seat is safer because standing requires less knee bending.
The correct raised toilet seat height needs to balance easier standing with stable sitting.
4. Which Height: 50mm, 100mm or 150mm?
Raised toilet seats sold in New Zealand commonly use several standard height increases.
Health New Zealand describes options ranging from approximately 50mm to 150mm.
These sizes should be treated as choices rather than prescriptions.
50mm Raised Toilet Seat
A 50mm or approximately 2-inch raise may suit a senior who:
- Finds the existing toilet only slightly low
- Has reasonable leg strength
- Still wants good foot contact
- Needs a modest reduction in sitting depth
- Is shorter in stature
- Does not need a large height change
The advantage is that it changes the toilet less dramatically.
However, 50mm may not be enough for someone who finds standing very difficult.
100mm Raised Toilet Seat
A 100mm or approximately 4-inch raise is a common middle option.
It may suit a senior who:
- Has noticeable difficulty standing from a standard toilet
- Needs more height but still maintains good foot support
- Has reduced leg strength
- Wants a substantial but not extreme height increase
A 100mm model should still be tested against the individual senior.
It should not be chosen simply because it appears to be the standard size.
150mm Raised Toilet Seat
A 150mm or approximately 6-inch raise creates a much larger change.
It may be considered when:
- The existing toilet is very low relative to the user
- The senior is taller
- Lowering deeply is particularly difficult
- A professional has recommended a larger height increase
However, this size requires careful checking.
A 150mm raiser can easily make the final toilet too high for a shorter senior.
Always confirm that both feet remain supported.
A Practical Home Measurement
Before buying, you can make a rough comparison using a stable chair that the senior already finds comfortable to sit on and stand from.
Measure:
- Floor to top of the current toilet seat
- Floor to top of the comfortable chair seat
The difference gives a rough indication of how much extra toilet height may be worth testing.
For example, if:
- Toilet seat height = 410mm
- Comfortable chair height = 490mm
the difference is approximately 80mm.
That does not mean an 80mm toilet raiser is automatically correct.
It simply provides a useful starting point for testing nearby options.
Foot position and actual toilet transfers remain more important than the calculation.
Do Not Copy Another Person’s Height Setting
Two seniors of the same overall height may need different toilet setups.
Differences can include:
- Leg length
- Hip mobility
- Knee movement
- Strength
- Balance
- Footwear
- Arm strength
- Transfer technique
- Pain
- Existing toilet dimensions
Do not choose 100mm simply because another family member uses 100mm.
Fit the equipment to the actual user.
5. Make Sure the Raised Seat Fits the Toilet
Correct height is useless if the product does not fit securely.
Raised toilet seats may attach using:
- Adjustable side brackets
- Front and side clamps
- Locking mechanisms
- Replacement-seat bolts
- Frame-supported designs
Check:
- Bowl shape
- Bowl width
- Bowl length
- Position of the existing seat
- Distance to the cistern
- Mounting points
- Product adjustment range
Some modern toilets have unusual shapes.
A product described as fitting “most toilets” should still be measured before buying.
Check for Rocking or Movement
Once installed, the raised toilet seat should not:
- Rock
- Twist
- Slide sideways
- Lift during standing
- Move when the senior turns
- Separate from the toilet unexpectedly
Health New Zealand advises that correctly fitted toilet equipment should remain secure and not wobble.
Regularly recheck the mounting system.
Cleaning and repeated use can loosen fittings over time.
Toilet Shape Matters
Common toilet bowls may be:
- Round
- Oval
- Elongated
- Compact
- Wall-hung
- Back-to-wall designs
Some raised seats suit a wide range of bowls.
Others have more specific dimensions.
Before ordering online, compare the retailer’s product measurements with the real toilet.
Do not rely on a product photograph alone.
6. Raised Toilet Seat With Arms or Without Arms?
Height is not the only decision.
Some seniors need additional hand support while lowering and standing.
Raised toilet seats may be available:
- Without arms
- With fixed arms
- With removable arms
- As part of a larger toilet frame
Raised Toilet Seat Without Arms
This may work when the senior:
- Has reasonable balance
- Can use an existing grab bar
- Has good upper-body control
- Needs mainly extra height
- Has a narrow bathroom where wide arms would interfere
For product options, compare our raised toilet seats for seniors in NZ guide.
Raised Toilet Seat With Arms
Arm supports may help when the senior:
- Pushes through both hands to stand
- Wants more control while lowering
- Has reduced leg strength
- Does not have correctly positioned wall rails
Check the usable width between the arms.
A seat can have the correct height but still be uncomfortable if the arms are too narrow.
Toilet Frame
A toilet safety frame provides support on both sides of the toilet.
This may be useful when:
- Bilateral arm support is important
- Wall-mounted rails are unavailable
- The household wants adjustable support
- A raised seat alone does not provide enough stability
For freestanding surrounds, raised over-toilet frames and current New Zealand options, read our toilet frames for seniors in NZ guide.
7. Recheck Grab Bars After Changing Toilet Height
Raising the toilet changes the user’s sitting and standing position.
That can change the most useful grab-bar position.
A rail that worked with the original toilet may become:
- Too low
- Too high
- Too far behind the user
- Awkward to reach during standing
Do not plan toilet height and grab-bar placement as completely separate decisions.
For detailed rail positioning around toilets and showers, read our grab bar placement for seniors guide.
One Rail or Two?
Some seniors only need one well-positioned grab bar.
Others may benefit from support on both sides.
The decision can depend on:
- Leg strength
- Balance
- Shoulder strength
- Hand preference
- Bathroom wall position
- Toilet location
- Transfer technique
A toilet frame or fold-up rail can sometimes provide more practical bilateral support than a single fixed wall rail.
Check Bathroom Clearance
Raised toilet seats with arms and frames require more space than a simple seat raiser.
Measure:
- Distance to the wall
- Vanity clearance
- Shower-door movement
- Space in front of the toilet
- Walking-frame clearance
- Caregiver space if needed
The senior should be able to approach, turn, sit and stand without another product blocking the movement.
Small Bathrooms
In a compact bathroom, a simple raised toilet seat may fit where a wide toilet frame does not.
However, choosing the narrowest product should not come at the expense of support.
Possible compact solutions may include:
- Raised seat without arms
- Fixed wall grab bars
- Fold-up wall rails
- Narrow removable arm supports
Consider the complete transfer rather than only the footprint of the product.
Raised Toilet Seats and Walking Frames
A walking frame should normally be positioned so it is available after the senior has stood and regained balance.
The senior should not rely on pulling the walking frame towards themselves to stand from the toilet.
A movable walking aid may roll or shift.
Use the toilet seat, arm supports or appropriately installed grab bars according to the person’s established transfer method.
Weight Capacity
Every raised toilet seat has a maximum user-weight specification.
Check the exact model.
Do not assume all plastic raised seats have the same capacity.
Also check the weight limit for:
- Armrests
- Toilet frames
- Fold-up rails
- Associated equipment
The user’s weight should remain within the manufacturer’s stated limit.
Hygiene and Cleaning
Raised toilet seats need regular cleaning.
Check whether the product:
- Can be removed easily
- Has smooth surfaces
- Has difficult gaps around brackets
- Traps moisture
- Allows access for personal hygiene
- Can be reinstalled securely after cleaning
After removing the seat, make sure all brackets and locks are correctly refitted before the next use.
Do not allow convenience during cleaning to result in loose installation.
Check the Equipment Regularly
Inspect the raised toilet seat periodically.
Look for:
- Loose brackets
- Cracks
- Damaged plastic
- Worn rubber components
- Corrosion
- Movement
- Loose armrests
- Failed locks
Stop using the product if it becomes unstable.
A seat that was secure when first installed may loosen after repeated use.
Raised Toilet Seat vs Higher Toilet
Some households considering long-term bathroom renovation may prefer a permanently higher toilet rather than an add-on raised seat.
A higher toilet can:
- Reduce additional equipment
- Look more integrated
- Simplify cleaning
However, a permanently high toilet still needs to fit the individual user.
It can also be less suitable for shorter family members.
A removable raised toilet seat provides more flexibility when the need is temporary or limited to one user.
Raised Toilet Seat After Surgery
Raised toilet seats are sometimes considered during recovery when deeper sitting is uncomfortable or difficult.
However, the correct setup depends on:
- Type of surgery
- Current mobility
- Weight-bearing restrictions
- Professional instructions
- Home layout
Do not use a generic height recommendation in place of discharge instructions from the healthcare team.
If equipment was recommended by a hospital, physiotherapist or occupational therapist, use the height and setup they specify.
What If the Senior Still Cannot Stand?
If a correctly fitted raised toilet seat still does not make the transfer manageable, simply adding more height may not solve the problem.
Other considerations may include:
- Arm supports
- Grab bars
- Toilet frame
- Strength and balance
- Transfer technique
- Caregiver assistance
- Commode
- Different bathroom equipment
If reaching the bathroom itself is difficult, a bedside or mobile commode may sometimes be more appropriate.
For available options, read our commode chairs for seniors in NZ guide.
Raised Toilet Seat or Commode?
They solve different problems.
A raised toilet seat modifies an existing toilet.
A commode can provide a toileting option closer to the bed or another room.
A commode may be considered when:
- The bathroom is too far away
- Nighttime walking is difficult
- The senior cannot safely reach the toilet
- A caregiver needs easier access
- A mobile toileting solution is required
Do not choose a commode only because the toilet seat feels low.
If toilet access is otherwise safe, correcting seat height may be the simpler solution.
Common Raised Toilet Seat Height Mistakes
Choosing the Tallest Option Automatically
Higher is not automatically safer.
The feet must remain supported.
Measuring the Toilet Bowl Instead of the Seat
Measure the final sitting surface.
Ignoring the Senior’s Leg Length
Overall body height does not tell the whole story.
Buying Before Measuring the Toilet
A raised seat must fit the actual bowl.
Ignoring Armrest Width
The senior may not fit comfortably between the arms.
Using a Loose Seat
A raised toilet seat should not move or wobble.
Installing Grab Bars Before Finalising Seat Height
The raised seat changes the hand position.
Assuming More Height Solves Weakness
The senior may need additional support or professional assessment.
Forgetting Cleaning Access
The equipment must remain practical for everyday hygiene.
Failing to Recheck the Fittings
Brackets can loosen over time.
When to Seek Professional Advice
Consider an occupational therapist, physiotherapist or appropriate equipment specialist when the senior:
- Has fallen near the toilet
- Has frequent near-falls
- Needs physical assistance
- Uses a wheelchair
- Has significant weakness
- Has major balance problems
- Cannot keep both feet supported
- Has recent surgery
- Has severe pain
- Cannot control sitting down
- Needs a commode
- Needs multiple bathroom modifications
- Has rapidly changing mobility
- Is unsure whether the toilet height is appropriate
Professional assessment can consider the senior, toilet, grab bars, bathroom space and transfer technique as one complete system.
Official New Zealand Guidance
Health New Zealand states that raised toilet seats are available in different heights, commonly ranging from approximately 50mm to 150mm.
It also explains that the best height depends on:
- The person’s height
- The height of the existing toilet
- Individual needs
When using adjustable toilet equipment, the final position should allow the person to sit comfortably with their feet flat on the floor.
That is a more useful principle than choosing a universal height for every senior.
For a complete review of shower seating, flooring, grab bars, toilet support and other bathroom hazards, use our bathroom safety checklist for seniors in NZ.
Final Recommendation
Start by measuring the existing toilet and observing the senior’s normal sitting and standing movement.
Then choose a raised toilet seat height that:
- Reduces excessive lowering
- Makes standing more manageable
- Keeps both feet securely supported
- Fits the toilet correctly
- Remains stable
- Works with existing grab bars
- Provides enough bathroom clearance
- Matches the user’s weight
- Allows practical cleaning
A 50mm, 100mm or 150mm raiser may all be appropriate in different situations.
There is no single height that is automatically best for every older adult.
For current raised toilet seat options available in New Zealand, read our raised toilet seats for seniors in NZ guide.
If the senior needs support on both sides, compare our toilet frames for seniors in NZ guide.
The best raised toilet seat is not the tallest model.
It is the model that creates a stable, comfortable final toilet height for the person who will actually use it.
Frequently Asked Questions
What is the best raised toilet seat height for seniors?
There is no universal best height.
The correct height depends on the senior’s leg length, existing toilet height, strength and ability to keep both feet supported.
What heights do raised toilet seats come in?
Health New Zealand notes that common raised toilet seat heights range from approximately 50mm to 150mm, or around 2 to 6 inches.
Is a 4-inch raised toilet seat too high?
Not necessarily.
A 100mm or 4-inch raiser may suit some seniors but be too high for others.
Check the final sitting position and foot contact.
Is a 6-inch raised toilet seat better?
Only when the extra height is appropriate for the individual.
A 150mm raiser can leave shorter users with poor foot support.
Should your feet touch the floor on a raised toilet seat?
Yes, stable foot support is an important part of a comfortable toilet transfer.
The final height should allow the senior to sit with their feet securely supported.
How do I know if a raised toilet seat is too low?
The senior may still struggle to stand, drop heavily while sitting or need excessive arm effort.
How do I know if a raised toilet seat is too high?
Possible signs include dangling feet, only the toes reaching the floor, sliding forward or difficulty positioning the feet before standing.
Can I measure the correct height at home?
You can estimate a starting point by comparing the existing toilet height with a stable chair height the senior finds comfortable.
The actual toilet transfer should still be tested.
Does a raised toilet seat fit every toilet?
No.
Toilet shape, bowl dimensions and attachment systems vary.
Check the exact product specifications before buying.
Is a raised toilet seat with arms better?
It may be useful when the senior needs hand support while sitting or standing.
However, the arm width and bathroom clearance must also fit the user.
Is a toilet frame better than a raised toilet seat?
They solve different problems.
A raised seat primarily changes height, while a toilet frame provides bilateral arm support.
Some seniors use both types of support.
Do grab bars need to be moved after installing a raised toilet seat?
Possibly.
Increasing toilet height changes the user’s arm and shoulder position, so grab-bar placement should be reviewed.
How often should a raised toilet seat be checked?
Check it regularly for movement, loose brackets, cracks or damaged components and after it has been removed for cleaning.
Should a raised toilet seat wobble?
No.
Correctly installed toilet equipment should remain stable and securely attached.
When should I ask an occupational therapist for help?
Professional advice is especially useful when the senior has falls, major weakness, wheelchair transfers, recent surgery, significant pain or difficulty completing the toilet transfer safely.
