Most bathrooms start with three spots: beside the toilet, at the tub or shower entry and along the long wall inside the shower. Horizontal bars usually sit 33 to 36 inches above the floor, fixed into studs or anchors made for your wall.
Which spots in a bathroom matter most?
Think about the moments when a hand naturally looks for something to hold. Most people find three. The first is beside the toilet, where you sit down and stand up. The second is the entry to the tub or shower, where you step over a ledge or onto a wet floor. The third is the long wall inside the shower or above the tub, where you stand while washing. Start with the spot that feels hardest today. You can always add the others later, and the measurements you take now will help.
How high should a grab bar be?
A useful starting point is the ADA standard for public buildings, which places horizontal grab bars 33 to 36 inches above the finished floor. At home you can tailor it to the person who will use it. Ask them to stand where the bar will go and rest a hand where it feels natural, then mark that height with a strip of painter's tape. For a bar inside a tub, measure from the tub floor, not the bathroom floor. Live with the tape for a day or two before you drill.
Should the bar be horizontal, vertical or angled?
Each direction suits a different movement. A vertical bar at the tub or shower entry gives a steady handhold while you step in and out. A horizontal bar along a wall suits standing and moving sideways, and beside a toilet it gives something to push down on. Some people find an angled bar comfortable for rising from a seat. There is no single right answer, so watch how the person moves in the room and place the bar where their hand already goes.
What length do I need?
Measure the clear wall first, from corner to corner or fixture to fixture. In most US homes, wall studs sit about 16 inches apart, measured center to center, so bars that span 16, 24 or 32 inches between their mounting points can land both ends on studs. The ADA standard uses a 42 inch bar on the side wall next to a toilet, but at home a shorter bar that fits your studs is often the practical choice.
Screw-in or suction: which is right for me?
Screw-in bars are the permanent option. They fix to wall studs, or to anchors made for your wall type where a stud is not in the right place. Suction bars press onto smooth, flat, non-porous tile or glass and can be moved, which suits renters and travel. They will not hold on textured tile, across grout lines or on painted walls. Whatever you choose, follow the maker's instructions and check a suction bar's indicator before every single use.
Can I install a grab bar myself?
If you are comfortable with a drill, often yes. You will need a stud finder, a level, a pencil, a drill with a bit suited to your tile, and the screws or anchors the instructions call for. Drilling through ceramic tile takes patience and the right bit. If the wall is fiberglass, if you cannot find studs, or if you would simply rather not, a local handyman can usually fit a bar quickly. Never use a towel bar or a soap dish as a handhold.
What should I check before I order?
Run through a short list. What is the wall surface: tile, drywall or fiberglass? Where are the studs? How much clear wall is there? What height felt right with the tape test? Will the bar be screwed in or held by suction? With those five answers, you can compare the details on any product page and choose with confidence. After fitting, give the bar a firm pull, then check it again every few weeks.