Size of the Space for a Bathroom Sink

Updated February 21, 2017

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 yourself.

Typical Bathroom Sink Sizes

A typical bathroom sink 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 centre of the sink to the back wall to install most faucets. The type of sink also affects the installation space, however.

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.

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.

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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About the Author

Steve Smith has published articles on a wide range of topics including cars, travel, lifestyle, business, golf, weddings and careers. His articles, features and news stories have appeared in newspapers, consumer magazines and on various websites. Smith holds a Bachelor of Arts in English and journalism from University of New Hampshire Durham.