Bathroom Vanity Sizes: Widths, Depths and Heights

Standard bathroom vanity widths are 24, 30, 36, 42, 48, 60, 72 and 84 inches. Most freestanding vanities are 21 to 22 inches deep and finish 34 to 36 inches tall with the countertop. Start with your available wall space: if the vanity sits between two walls, the full countertop needs to be narrower than that space, and the countertop is often wider than the size in the product name.

We see this come up at the showroom counter. Someone is looking at a 30-inch vanity and assumes the whole thing measures 30 inches across. But a 30-inch cabinet can actually be 29-1/2 inches wide, while the matching prefabricated countertop measures 31-1/2 inches. That's a difference worth knowing before you order.

Now picture an alcove, the space between two walls, that measures exactly 30 inches. A standard 31-1/2-inch top won't fit between those walls. I didn't realize how much the countertop could change the answer the first time I looked at vanity dimensions either. These days, I always look at the cabinet and the top separately.

Standard bathroom vanity sizes at a glance

Here's where I'd start when choosing a vanity width. The matching top sizes below are based on the prefabricated quartz vanity tops we carry.

Width	Matching top size	Fits	Sinks
24 inches	25-1/2 inches	Smaller bathrooms with limited wall space	Single
30 inches	31-1/2 inches	Smaller bathrooms with room for a standard-depth vanity	Single
36 inches	37-1/2 inches	Bathrooms with more countertop space available	Single
42 inches	43-1/2 inches	Bathrooms needing more cabinet and counter space	Single
48 inches	49-1/2 inches	Wider bathrooms with room for a larger vanity	Single or tight double
60 inches	60-1/2 inches	Bathrooms with room for two sinks	Single or double
72 inches	73-1/2 inches	Larger bathrooms with room for a double vanity	Double
84 inches	Comes with its own top	Larger bathrooms with an extended vanity wall	Double

These are nominal sizes, meaning the rounded width used to name a vanity, rather than a guarantee of its exact measurements.

Why a 30 inch vanity isn't 30 inches

A vanity's nominal width is the size you'll see in its product name. The actual cabinet width can be different, and the countertop may have another measurement entirely.

Take our Lyon 30-inch freestanding vanity. The cabinet is 29-1/2 inches wide and 21 inches deep, and the whole vanity stands 36 inches tall. It includes a sintered stone countertop, a durable surface made from minerals bonded under heat and pressure, and an undermount sink, which attaches beneath the countertop. The vanity lists at $1,160.

Our Munich 48-inch freestanding vanity shows another variation. The cabinet is 46.85 inches wide and 21.46 inches deep, while its quartz top is 47.24 inches wide and 21.7 inches deep. Its finished height with the top is 35.86 inches, and it starts at $1,840.

Then there's the separate countertop option. A nominal 30-inch vanity base typically pairs with one of our 31-1/2 by 22-inch prefabricated quartz tops. That top has an overhang, which means the countertop extends beyond the cabinet edges, of about 3/4 inch on each side.

That's why I check both measurements. The cabinet might fit the wall perfectly while the countertop doesn't.

How to pick a width from your wall

The width you should shop depends on what's beside the vanity. An open wall gives you more flexibility than a cabinet that has to fit between two finished walls.

Between two walls (alcove)

An alcove is a space enclosed by walls on both sides. For this setup, aim for an overall vanity width, including the countertop, about 1 inch narrower than your smallest wall measurement. That gives you some room to work with if the walls aren't perfectly even.

Here's the part that catches people: a 30-inch alcove doesn't automatically fit a 30-inch vanity with a standard top. Our matching 31-1/2-inch countertop would be too wide.

For an alcove measuring 30 inches, start by looking at a 28-inch vanity or a 24-inch vanity. Another option is a 30-inch base with a custom-cut countertop, provided the actual cabinet dimensions fit.

A 24-inch base with our standard 25-1/2-inch top leaves more room between the walls. If you're working with a tight alcove, I'd rather see you confirm the countertop dimensions before ordering than discover the problem during installation.

For the step-by-step process of checking your space, use the measuring checklist. It covers the measurements you'll want before settling on a size.

One open side

If the vanity sits against a wall on one side and has open space on the other, you have more flexibility with the countertop overhang.

For example, a nominal 36-inch cabinet with a 37-1/2-inch top may work where the extra countertop width can extend into the open side. You still need to confirm the finished dimensions and make sure the vanity doesn't interfere with the space around it.

This is also where the choice between freestanding vanities and floating vanities comes in. A freestanding vanity sits on the floor, while a floating vanity mounts to the wall and leaves open floor space underneath.

Next to a toilet

If the vanity sits beside a toilet, don't use every inch of available wall space without checking the required clearances.

Under IRC R307.1 and P2705.1, the toilet centerline, an imaginary line through the middle of the toilet, must be at least 15 inches from the vanity side or a side wall. The IRC also calls for at least 21 inches of clear floor space in front of a toilet or bathroom sink.

The Uniform Plumbing Code, which California's plumbing code is based on, calls for 24 inches of clear space in front of a toilet. The National Kitchen & Bath Association (NKBA) recommends 30 inches of clear space in front and 20 inches from the sink centerline to a side wall.

So if a wider vanity leaves too little room beside the toilet, go down a width. It's better to choose a cabinet that works with the bathroom's clearances than to make the room feel crowded.

Vanity depth: 21 to 22 inches, or shallower

Most freestanding bathroom vanities are 21 to 22 inches deep, measured from the back of the cabinet toward the front. Our prefabricated quartz vanity tops are 22 inches deep.

If your bathroom is narrow, a shallower vanity may help. Shallow models around 16 to 19 inches deep exist, and most floating vanities are 20 inches deep or less.

Just keep the sink in mind. A round undermount sink needs a cabinet about 21 inches deep, so a shallow cabinet may limit which sink you can use.

You'll also need clear floor space in front of the sink. The IRC calls for at least 21 inches, while the NKBA recommends 30 inches. The deeper the vanity, the more important that front clearance becomes.

For layouts where every inch matters, see our small bathroom vanity ideas.

Vanity height: 34-1/2 inch cabinets, 36 inch counters

Vanity height can mean the cabinet height or the finished height with the countertop installed. Those aren't always the same number.

A standard vanity cabinet is 34-1/2 inches tall. Once the countertop is installed, most finished vanities fall around 34 to 36 inches high, depending on the cabinet and top.

Our Chalk Birch Shaker cabinets are 34-1/2 inches tall before the countertop goes on.

The Munich 48-inch vanity is another useful example. Its cabinet measures 33.46 inches tall, and its finished height with the quartz top is 35.86 inches.

A vessel sink, which is a basin that sits above the countertop rather than below it, can add another 5 to 6 inches of height. That's worth checking if you're choosing a taller cabinet.

Floating vanities are different because the finished height depends on where the cabinet is mounted. You can compare those installation choices in our floating vs freestanding guide.

Single or double sink by width

If you're deciding between one sink and two, the vanity width helps narrow the choice.

• Under 48 inches: Start with a single sink. This gives you room for the basin and surrounding countertop within a smaller cabinet.
• 48 inches: Two sinks are possible, but it's a tight arrangement. The sink centers are about 24 inches apart.
• 60 inches: This is the standard starting width for a double vanity. Our 60-1/2-inch prefabricated quartz top is available with a single or double sink.
• 72 inches: A double vanity gives about 36 inches between sink centers, matching the NKBA recommendation. Our 73-1/2-inch quartz top comes in a double-sink configuration.

Our Bibury 72-inch freestanding vanity is one example of a larger double vanity. It measures 72 inches wide, 20.5 inches deep and 35.875 inches tall, with an integrated quartz double-sink top, meaning the sinks are built into the countertop. It lists at $3,200.

If you're weighing the extra sink against available counter and storage space, our double vanity guide goes into that decision.

One cabinet line, every width: what size changes cost

Width affects what you'll spend, but it isn't the only factor. The drawer arrangement matters too, even within the same cabinet line.

Here's our Chalk Birch Shaker line. It's RTA, short for ready to assemble: the cabinet ships flat and goes together with basic tools, or you can choose our assembly service. These cabinets have plywood boxes, measure 22 inches deep including the doors, and stand 34-1/2 inches tall. Prices are for the cabinet only, with the countertop sold separately.

Cabinet width	Configuration	Cabinet price
24 inches	Sink base	$845
30 inches	Combo base	$960
36 inches	Combo base	$1,015
42 inches	Combo base	$1,055
48 inches	Six-drawer combo base	$1,350
54 inches	Six-drawer base	$1,440
60 inches	Three-drawer base	$1,360
60 inches	Six-drawer base	$1,530
72 inches	Three-drawer base	$1,560

Notice that the 60-inch three-drawer cabinet lists at $1,360, while the 54-inch six-drawer cabinet lists at $1,440. The wider cabinet doesn't always cost more because the drawer configuration changes too.

For a cabinet-only purchase, you'll need to budget for the top separately. Our vanity tops start at $820 to $855, and the 31-1/2-inch Calacatta Gold quartz top with a single faucet hole lists at $850.

Our online prices include shipping to the lower 48 states.

Size starting points by bathroom

If you're still deciding which width to shop, I'd use these as starting points. The right size still depends on your actual wall space, countertop width and required clearances.

Room	Width to start with	Depth
Small bathroom with limited wall space	24 to 30 inches	16 to 19 inches if a shallow model is needed
Bathroom with room for a single sink and more countertop	36 to 42 inches	21 to 22 inches
Bathroom with space for a larger single vanity	48 inches	21 to 22 inches
Bathroom planned for two sinks	60 inches	21 to 22 inches
Larger bathroom planned for two sinks	72 inches	21 to 22 inches

Once you have a starting width, compare the actual dimensions in the listings. You can browse our freestanding vanities or floating vanities by the space you have available.

If you want a broader look at floor-standing cabinet styles before choosing, our freestanding vanity guide is a useful next read.

For contractors and designers

When you're specifying a vanity for an alcove or working from a finished wall dimension, check the nominal width against the actual cabinet width and the overall countertop width. A product name alone isn't enough for a tight installation.

Our prefabricated quartz vanity tops are 22 inches deep and 3/4 inch thick, with a 4-3/4-inch backsplash, the raised piece at the back that protects the wall, and one side splash. A side splash is the protective strip that sits on top of the countertop against a side wall. It's 3/4 inch thick.

Remember the typical 3/4-inch countertop overhang on each side. A standard top may need to be cut for an alcove, and the side splash needs to be considered where the countertop meets the wall.

Fillers, which are narrow pieces used to close gaps between a cabinet and a wall, can help finish an alcove installation. Scribing means trimming a filler or panel to follow a wall that isn't perfectly straight.

Confirm the cabinet dimensions, countertop dimensions and finished overall dimensions on every product listing. The Lyon and Munich examples show why that matters: the number in the product name doesn't always match the physical width you'll be installing.

Frequently asked questions

What is the most common bathroom vanity size?

There isn't one. Most single sink bathrooms land between 24 and 48 inches, and 60 inches is the standard double. The best starting point for your bathroom depends on the available wall space and whether you need one sink or two.

Can a 30 inch vanity fit a 30 inch space?

Sometimes, but you need to check the cabinet and countertop separately. A 30-inch cabinet may be 29-1/2 inches wide, while a standard matching countertop is 31-1/2 inches wide, so that top won't fit a 30-inch alcove. A narrower vanity or a custom-cut top may be needed.

How deep is a standard bathroom vanity?

Most freestanding bathroom vanities are 21 to 22 inches deep. Shallower options around 16 to 19 inches exist, and most floating vanities are 20 inches deep or less. Check the sink requirements too, since a round undermount sink needs a 21-inch-deep cabinet.

What size vanity do I need for two sinks?

Start with a 60-inch vanity for a standard double-sink arrangement. A 48-inch double is possible but tight, while a 72-inch vanity gives about 36 inches between sink centers. Check the actual top dimensions and available wall space before ordering.

Call 657-279-8130 or visit the KBF showroom in Anaheim, CA. We ship to the lower 48 states.