How to Measure for a Kitchen Sink

Updated: Dec 30, 2020

Measuring for a kitchen sink is harder than it sounds and the sink must always be 3” smaller than the cabinet. Read on to find out more.



The first step is to understand the sizing of your sink base so that you can proceed accordingly. The next step is more confusing and revolves around sink sizing for under mount sinks. Once these aspects are determined, you can focus on fitting the sink to your cabinet and as mentioned, manufacturers always recommend that the cabinet is a full 3” larger than the sink because it will be placed inside the cabinet walls and you need to accommodate the thickness of the wall. Mounting clips will be required to secure the sink directly to the countertop. An anchor, clip and screw are all components that are included with the clips, which are another reason that sink companies recommend a sink 3” smaller than the cabinet as it will leave the right amount of room for the clips on both sides. Make sure to use your clips; otherwise, your sink may fall into your cabinet from the countertop.


The other component you’ll have to consider is your faucet so that you leave enough room to mount it. Those who have a window ledge behind their sink need to pay extra attention to their measurements because the ledge can impact the space that is available. You may have to choose a faucet that has a “forward only” handle movement, for example, to ensure you take your ledge into consideration.


If you are interested in an apron front or farm sink, you should follow the same 3” rule because it will apply here as well. There are, of course, other elements that can affect this restriction and some may allow you to push past it while others will force you to adhere to it. Apron sinks generally require a different cabinet when compared to a standard under mount sink and installing one is different than installing a countertop one, which is something most people do not realize. The largest sink you would be able to put into a cabinet if you are after an apron sink is one, which is the same size as the cabinet if certain factors are met like the placement of the cabinet in relation to the dishwasher, for example.


The material of the sink will also play a role because stainless sinks are more exact and consistent, while fireclay sinks can be larger or smaller than the intended size. Finally, you will have to look at which cabinets are actually next to the sink base as this, too, would make a difference. If these factors line up, you will have some room to play around.


Feel free to contact us if you have any questions.