Bathroom Vanity Size Guide: How to Measure for the Right Width, Depth and Height

Measure the wall where the vanity will go, then subtract the clearance you need beside the toilet and in front of the sink. In most homes that leaves room for a 24- or 30-inch vanity in a small bathroom or powder room, a 36-inch vanity in a standard hall bath, and 48 inches or more in a primary bath. Standard depth is about 21 inches; 18 to 20 inches is a smart choice in a tight room. Before you order, check where the drain and water lines come out of the wall or floor, because that decides which style will work.

Width gets most of the attention, but depth, height and plumbing decide whether a vanity really fits. Here's how to check each one.

Quick sizing chart

• Half bath or very narrow niche: 16 to 20 inches wide.
• Small full bath or powder room: 24 to 30 inches wide.
• Standard hall or guest bath: 30 to 36 inches wide.
• Larger bath, one sink with more counter: 42 to 48 inches wide.
• Two sinks: usually 60 inches wide or more.
• Depth: about 21 inches is standard; 18 to 20 inches keeps a small room easier to move through.
• Counter height: 30 to 32 inches is the traditional height; 34 to 36 inches is often called comfort height.

Step 1: Measure the space

• Wall width: measure the full run of wall available for the vanity, corner to corner or corner to the next obstacle.
• Toilet clearance: measure from the center of the toilet to where the vanity would end. Most U.S. building codes require at least 15 inches from the toilet's centerline to the edge of a vanity, and design guidelines suggest about 18 inches for comfort.
• Front clearance: measure from the wall to whatever is opposite, such as a tub, a wall or the toilet. Codes commonly call for at least 21 inches of clear floor in front of a sink, and 30 inches feels much more comfortable.
• Door swing: open the bathroom door all the way and note where it lands. A vanity, or its open drawer, should not block it.
• Wall features: mark outlets, light switches, windows, towel bars and the mirror so the new vanity and backsplash won't cover them.

Local codes vary, so check yours if you're remodeling.

Step 2: Choose the width

Take the wall width, subtract what you need for toilet clearance, and that's your maximum. Then step down to the nearest common size. If the math says 33 inches, a 30-inch vanity will fit with a little breathing room, while a 36-inch one won't.

A vanity can sit tight against a side wall. For two sinks, keep the sink centers about 30 inches apart or more, which is why double vanities usually start at 60 inches.

Step 3: Check depth and height

Depth

Standard vanities are about 21 inches deep. Many of the vanities we carry are listed between about 18 and 20 inches deep, which gives back a few inches of walkway in a small bathroom without making the sink feel cramped.

Height

A finished counter height of 30 to 32 inches is traditional and works well for children and shorter adults. Comfort height, 34 to 36 inches, is closer to kitchen counter height and is easier on the back for taller people. A vessel sink sits on top of the counter, so add the height of the bowl when you decide where the counter should land.

With a floating vanity, you choose the height when you mount it. The cabinet itself is often well under 24 inches tall, so read the listed height as the box size, not the finished counter height.

Step 4: Look at the plumbing

This is the step people skip, and it's the one most likely to cause trouble on installation day. Look under your current sink and note three things: where the drain pipe comes out, where the hot and cold supply valves are, and whether they come out of the wall or up through the floor.

• Wall plumbing works with both freestanding and floating vanities. With a floating vanity, the drain and supply lines need to come out of the wall inside the cabinet's footprint, above its bottom edge.
• Floor plumbing usually needs a freestanding vanity with an open back, or a plumber to move the lines into the wall.
• Drawers can collide with the drain trap. A vanity whose top drawer sits right where your drain comes out may need a different layout.
• Faucets are usually a separate purchase. None of the listings below mention a faucet, so plan to buy one that suits the sink.

If you're moving pipes, opening a wall, or mounting a heavy floating vanity, have a licensed plumber or contractor confirm the plan. Floating vanities with stone tops need solid support behind the wall, such as studs or added blocking.

Floating or freestanding?

A floating vanity leaves the floor open, which makes a small bathroom look bigger, and lets you set the height, but it needs wall plumbing and strong wall support. A freestanding vanity is simpler to swap in and usually offers more storage for its width.

Vanities by size

Half baths and narrow niches

The 18-inch white freestanding vanity with sink is listed at 17.7 inches wide, 17.7 inches deep and 33.5 inches high. According to its listing, it has an integrated white resin sink, one door with soft-close hinges, and an open cubby below, and the listing points to half baths and niche spaces.

24 inches: small full baths

Two floating options show how much the details matter at the same width. The 24-inch brown floating double door vanity is listed at 24.02 inches wide and 18.9 inches deep, with a gray engineered stone countertop, an integrated white ceramic sink and soft-close doors. The 24-inch green floating vanity is the same depth but uses a white ceramic vessel sink on an engineered stone top, with one soft-close drawer, so remember to add the bowl's height when you set the mounting height.

30 inches: the flexible middle

The 30-inch brown double door vanity with white ceramic sink is freestanding and listed at 34.25 inches high, 30 inches wide and 18 inches deep, close to comfort height. Its listing describes a white cultured marble countertop with a backsplash, an integrated ceramic sink and soft-close doors.

36 inches: standard baths

The 36-inch brown floating vanity with white ceramic sink is listed at 35.83 inches wide, 18.9 inches deep and 17.72 inches high. According to its listing, it pairs a gray engineered stone countertop with an integrated ceramic sink, a soft-close door and a drawer.

48 inches: more counter, one sink

For a freestanding look with plenty of storage, the 48-inch black four door vanity is listed at 47.64 inches wide and 17.52 inches deep, with a white cultured marble countertop, an integrated acrylic sink, four drawers, shelves and gold metal handles. If you want the floor open, the 48-inch brown floating double door vanity is listed at 47.64 inches wide and 18.9 inches deep, with a gray engineered stone top and one integrated ceramic sink.

You can compare more widths, finishes and sink styles in bathroom vanities. For a mirror or medicine cabinet above it, choose one a few inches narrower than the vanity; there are wall-mounted options in bathroom storage and organization.

Delivery and returns

We ship to the contiguous U.S. and to Canada (not to Alaska, Hawaii or Puerto Rico). U.S. orders are usually processed in 1 to 5 business days and delivered in about 4 to 10 business days, with tracking by email and free shipping on orders over $120. Canadian orders usually arrive in 4 to 13 business days including processing, with free shipping over $500. Returns are accepted within 30 days for items that are unused and in their original condition and packaging, so open the box and check the vanity against your measurements before you assemble or install it. Questions about fit? Email help@FurniFindUSA.com or message us on WhatsApp at +1 484-459-6889.

Common mistakes

• Measuring the wall but not the toilet clearance. That 15-inch minimum from the toilet's center often decides the width.
• Ignoring floor plumbing. A floating vanity won't hide pipes that come up through the floor.
• Forgetting the vessel sink's height. A bowl on top of a 34-inch counter can end up uncomfortably high.

FAQ

What size vanity fits a small bathroom?

Usually 24 to 30 inches wide and 18 to 20 inches deep. In a half bath or a narrow niche, 16 to 20 inches can work.

How much space do you need between a toilet and a vanity?

Most U.S. codes require at least 15 inches from the center of the toilet to the edge of the vanity. About 18 inches is more comfortable.

What is the standard height of a bathroom vanity?

Traditional vanities have a counter height of 30 to 32 inches. Comfort-height vanities are 34 to 36 inches. With a floating vanity, you set the height when you mount it.

Can I put a floating vanity where the plumbing comes up from the floor?

Not without changes. A floating vanity needs the drain and water lines to come out of the wall inside the cabinet. A plumber can tell you whether moving them is practical.