Bathroom Sink Dimensions

Standard bathroom sink dimensions come in a wide variety of styles. Sink basins can be part of the countertop or separate from it, either installed in a hole in the top or sitting on top of it. Materials range from wood to plastic to marble and granite. Common dimensions for bathroom bowls are 18 to 24 inches wide, 14 to 20 inches long and 4 to 6 inches deep. They come in round, oval, square and scalloped shapes.

Bathroom Sink Dimension

Bathroom Sink Dimension

Bathroom sinks are smaller than kitchen sinks, generally ranging from 13 to 16 inches in diameter. The inside dimension is slightly smaller to account for the sink’s rim. A typical bowl depth in a bathroom sink is from 4 to 6 inches. When installing a bathroom sink, 15 inches of space is necessary from the back wall to the bowl’s center mark. All bathroom sinks are sized to fit inside a bathroom countertop or vanity. Pedestal sinks include their own support pedestal and have no countertop. The average pedestal sinks ranges from 22 to 26 inches wide with a 15-inch bowl diameter.

Bathroom sinks install in the countertop in your bathroom. The sink itself takes up a lot of space, so if you plan to install one, make sure there is room. Most sinks come in standard sizes to fit on most countertops, but it always pays to plan ahead and measure the space for you.

Typical Bathroom Sink Dimensions

A typical bathroom sinks measures between 13 and 16 inches in diameter. This measurement varies between sinks, however. This is just the typical size. In an oval bathroom sink, the diameter across the sink from side to side, is often up to 15 inches. However, the diameter from front to back is usually smaller to leave room for a faucet. You will need 15 inches of space from the center of the sink to the back wall to install most faucets. The type of sink also affects the installation space, however.

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Installation Space for Bathroom Sinks

To install a bathroom sink, a minimum amount of space is required. The size of the sink determines how much space is required, however. Measure the countertop from front to back and side to side with a tape measure. Then take the outside dimensions of the sink from front to back and then side to side to determine if the countertop has enough room. Outside dimensions are larger than the bowl dimensions, because they include the sink rim. This adds another inch or two to the overall diameter, depending on how large the rim is. Most bathroom countertops are 24 inches deep, so any sink less than 20 inches will fit on the standard countertop.

pedestal sink dimension

pedestal sink dimension

Accounting for Faucet Space

In most cases the faucet installs on the sink top, so additional space is not required to mount the faucet. However, if your sink bowl does not include mounting space for the faucet, account for the dimensions of the faucet base. Find out the width of the base and give yourself at least an inch leeway beyond this measurement. Find your faucet base dimensions on the faucet’s documentation or box. Reduce the size of the sink bowl if there is not enough space for both the faucet and the sink on your countertop.

Bathroom Sink Columbia Dimension

Bathroom Sink Columbia Dimension

Vanity Sinks and Pedestal Sinks

A pedestal sink is an all-in-one component including the sink bowl and faucet. This installs in the bathroom, and the space required for installation is dictated by the dimensions of the sink bowl. Simply measure the bathroom to determine if there is enough room for the pedestal. Vanity sinks include the sink and counter top in one piece. The dimensions of the vanity in this case dictate the space needed for installation. All you need to do is measure the bathroom to find out if there is enough space to install the vanity.

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Bathroom sink dimensions are dictated by the size of your cabinetry, countertops, and bathroom. Measure under your existing sink or where you want the new sink to be placed , you’ll also need at least 15″ of space from the centerline of the bowl to the nearest wall. Plus, you will want to also take in to consideration how much additional counter space you might desire.