Vanity listings usually lead with one number, the width, and leave you to guess the rest. If you are replacing a vanity in an existing bathroom, the height decides whether it is comfortable, the depth decides whether the door still opens, and the plumbing decides more than either.
The short answer: a standard bathroom vanity is 32 to 36 inches high, 18 to 21 inches deep, and comes in widths from 24 to 72 inches, most often 24, 30, 36, 48, 60 and 72. Height is the number most worth changing: 36 inches suits most adults standing, and anything lower was set for a different era.
| Dimension | Standard range | Notes |
|---|---|---|
| Height | 32 to 36 inches | 36 suits most adults; 30 to 32 under a vessel sink |
| Depth | 18 to 21 inches | 21 is standard, 18 for small rooms |
| Width | 24 to 72 inches | 24, 30, 36, 48, 60 and 72 are the common steps |
| Clear floor in front | 30 inches | To stand, bend and open a door |
Height: 32 to 36 inches, and why 36 is usually right
Older bathrooms were often fitted with vanities around 30 to 32 inches high. That height suits children and shorter adults, but most adults spend every morning bent over it. A 36 inch vanity, often called comfort height, sits close to kitchen counter height and lets you wash your face or brush your teeth without stooping.
- 36 inches for most adults.
- 32 to 34 inches if the main user is under about 5 foot 4, or in a children's bathroom.
- In a shared bathroom with very different heights, lean toward the taller user. A shorter person copes with a slightly high counter more easily than a taller person copes with a low one.
Height here means the top of the counter, including the countertop itself, not the cabinet box alone.
What a vessel sink does to the height
A vessel sink sits on top of the counter instead of dropping into it, and it adds 4 to 6 inches to the height you actually use. Put a 5 inch bowl on a 36 inch vanity and the rim lands at 41 inches, which is too high for almost everyone.
The fix is to subtract the bowl from the cabinet. A vessel sink usually wants a cabinet of 30 to 32 inches, so the rim ends up near a comfortable 36. Check the height of the bowl before choosing the vanity, not after. Our guide to vessel sinks and the height problem goes into faucet height and splash as well.
Depth: 18 to 21 inches
Depth is the number that decides whether a vanity crowds the room.
- 21 inches is standard and takes a normal basin with room for a faucet behind it.
- 18 inches works well in a small bathroom or powder room, where a few inches make the difference between a door that opens fully and one that bumps the counter.
- Under 16 inches, most standard basins stop fitting, and you are into compact or corner basins.
If depth is tight, check the door swing first. A vanity that is 3 inches too deep is a vanity the door hits every day.
Widths, and the ones worth choosing
Widths step up in fairly standard increments: 24, 30, 36, 48, 60 and 72 inches. A few practical rules:
- 24 to 30 inches fits a powder room or a small bathroom. Counter space is limited, so plan storage elsewhere too.
- 36 inches is a comfortable single-basin width with usable counter on both sides.
- 48 inches gives a single basin generous counter space and is often the most useful size in a family bathroom.
- 60 to 72 inches is where double basins become practical, with enough room between them for two people at once.
Leave a few inches between the vanity and any side wall or toilet, so the gap can be cleaned and the room does not look jammed. Once you know your width, the bathroom vanities collection lists dimensions on each product page. Compare a couple of different silhouettes, such as the curved-front Flow Curved Vanity and the more sculptural Sculptural Root Vanity, and check each one against your measurements rather than the photographs.
Clearance in front
Leave 30 inches of clear floor in front of the vanity. That is room to stand at the basin, bend down, open the cabinet doors or drawers, and still let the bathroom door open. In a very small room, check that the toilet, the shower door and the vanity doors do not all swing into the same patch of floor.
Measuring around existing plumbing
Plumbing position sets the limit more often than the room does. Before choosing any width, measure:
- The center of the waste pipe, from the back wall and from the nearest side wall.
- The water supply lines: their height from the floor and their distance from the side wall.
- The shut-off valves, which need to stay reachable inside the cabinet.
A vanity whose basin sits well away from the waste pipe means moving the plumbing, which is a plumber's job and a cost to add to the budget. If the drain is not centered on the wall, a vanity with an off-center basin, or a wider one that brings the basin over the pipe, may solve it more cheaply. Also check whether drawers or internal shelves would clash with the pipes. For the general method of measuring a space, doorways and delivery route included, see our guide to measuring before you order.
Wall-mounted or freestanding
A wall-mounted vanity makes a small room read larger and leaves the floor clear for cleaning. A freestanding vanity carries its weight on the floor, so it does not need the wall to take the load, and it is simpler to fit when you are not opening walls. We compare the two in detail in floating vanity or freestanding.
If the standard sizes do not suit your plumbing or your room, every Rootelier vanity is made to order and custom sizing is available. Email the width, height and depth you need, plus the finish, to support@rootelier.com, and the team replies to custom enquiries within 1 to 2 business days. Shipping is free within the contiguous US and DC. For more on planning the room, see storage in a small bathroom or browse the bathroom collection.
Frequently asked questions
What is the standard height of a bathroom vanity?
32 to 36 inches to the top of the counter. 36 inches, often called comfort height, suits most adults. Choose 32 to 34 inches for shorter users or a children's bathroom.
What is the standard depth of a bathroom vanity?
21 inches is standard. 18 inches works in small bathrooms and powder rooms. Below about 16 inches, most standard basins no longer fit.
What are standard bathroom vanity widths?
Common widths are 24, 30, 36, 48, 60 and 72 inches. From about 60 inches up, double basins become practical.
Does a vessel sink change the vanity height?
Yes. A vessel sink adds 4 to 6 inches above the counter, so the cabinet below should drop to around 30 to 32 inches to keep the rim near a comfortable 36.