How to measure your tub, toilet, bed and doorways
Five measurements decide whether most bathroom and bedroom products fit. Take them once, write them down, and use them in our filters. You'll need a tape measure, and a helper is useful.
Tub wall thickness (for clamp-on tub rails)
Measure across the top edge of the tub wall, from the inside face to the outside face, in inches. Clamp-on rails list the range of wall thickness they grip. Also note whether your tub is fiberglass, acrylic or cast iron. Some makers say their rail isn't for fiberglass tubs, and we show what each maker says.
Ceiling height (for transfer poles)
Measure from the floor to the ceiling at the exact spot the pole will stand, in inches. 8 feet is 96 inches. Tension poles press against the ceiling, so the maker's instructions say what kind of ceiling it needs. Read them before you buy.
Mattress thickness (for bed rails and handles)
Measure the mattress from top to bottom, in inches. Add a topper if you use one. Many bed rails list the mattress thickness they work with.
Bed rails can trap a person if the gaps are wrong. The CPSC sets a federal safety standard for adult portable bed rails (16 CFR part 1270). Follow the maker's fitting instructions exactly.
Toilet bowl shape (for raised seats)
Look at the bowl from above. A round bowl is close to a circle. An elongated bowl is longer and more oval. If you're not sure, find the model number inside the tank lid and look it up on the toilet maker's site. Raised seats are made for one shape or the other, and some fit both, per the maker.
Compare raised toilet seats and frames
Weight capacity
Every product lists the most weight the maker rates it to hold. Use the weight of the person who will use it. If you're between sizes, pick the higher capacity.
Not sure?
An occupational therapist can measure your home and suggest what helps. You can also borrow equipment from your state's program and try it at home before you buy.