Answer
What size toilet seat riser do I need?
Target height minus the seat height you have now, measured floor to top of seat. A standard toilet at about 15 in needs 2–4 in to reach the ADA range of 17–19 in, or 3 in to reach 18 in.
Open the toilet height calculator
Riser by seat height
| Seat now | Riser for 17–19 in |
|---|---|
| 14 in | 3–5 in |
| 15 in | 2–4 in |
| 16 in | 1–3 in |
A personal target
Measure a chair the person stands up from easily, floor to top of seat, and use that as the target. Higher isn’t always better: feet should still rest flat on the floor.
More questions
Do risers come in set heights?
Yes: most are sold in a few fixed heights. Pick the one that lands closest to your target without going over the top of your range.
Riser or new toilet?
A riser is removable and cheap; a comfort-height toilet is a plumbing job. Both can reach 17–19 in.
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