How to Measure an Under-Mount Sink?

Remodeling the entire kitchen or replacing your kitchen sink can be difficult. Before doing so, you need to take the measurements accurately to ensure the size is correct. Here is all you need to know about measuring an Undermount sink. All of the steps you need to follow are listed here, and you need to keep your measurements accurate so that you don’t mess up at the last step when installing the new Sink. So, let’s explore the art of measurement, ensuring that every inch aligns with your vision of the perfect kitchen space.

Accurate Measurements Are Crucial For A Successful Undermount Sink Installation.

Are you thinking of replacing your kitchen sink anytime soon? If you are doing it yourself, you must know the importance of every step you must follow for a successful installation. Replacing your kitchen sink may be a part of a more extensive remodeling process, or it might be done by yourself. If you are remodeling the whole kitchen or just changing the kitchen sink, you must take some measurements to ensure the Sink is the ideal size.

In this blog, you will learn how to measure your undermount sink accurately. Accurate measurements will ensure you get a snug fitting of your sink and counter space and have no leaks or spillage in the future. Here is a thorough step-wise process for what you must do to take measurements for your undermount Sink. 

Required Tools

List the necessary tools for the measuring process, such as a tape measure, level, and pencil. For measuring the Sink, you can use a few tools. But it is still good to gather everything before you start the process of measuring. The tools you will need are as follows:
  • Markers, pens, or pencils
  • Tape measure and a straightedge ruler
  • A level
Besides these, you might only require something else to measure the undermount Sink. Make sure you take precise measurements so that you can get everything right.

Step-by-Step Measurement Guide

To start on How to Measure an Under-Mount Sink, you will have to follow some steps that should be followed correctly to get exact measurements. When replacing a sink, it’s not just the sink itself that you measure. You will have to measure the cabinet underneath, too. Before you start, make sure that the sink is empty and clean. You must also finish the base cabinet below it to take exact measurements. 

Measure the Sink

The Sink must be measured in the last three dimensions: depth, length, and width. The width of your Sink is the measurement from the backside of the Sink, where you find the faucet, to the front. This is also the direction you will take when measuring the area. The length is measured from the left side of your sink to its right. 

When measuring the depths of the Sink, you can put in your ruler or the measuring tape up to the side, as the side of your Sink mainly covers just a bit. The deepest point of your Sink is anywhere in between. You can lay your level or the straightedge ruler across the Sink to get an exact measurement from the bottom to the top. 

Measure the Cabinet Space.

If you want a more oversized sink than the one you already have, you may also have to enlarge the cabinet. If you install a sink the same size as yours, measuring the cabinet will tell you whether it is the first. In both cases, measuring the cabinet is one essential step. 

Width and depth mean different things when you’re measuring the cabinet. The depth of your cabinet is measured starting on the back and then measuring along the bottom onto the front. The width of your cabinet is measured from the left side to the right. There is mostly a tiny margin of the counter space along the sides of the Sink, so to know the sink width, you will subtract four inches from the cabinet and one inch from its depth. 

Make sure your cabinet space is empty before you start the process for placement, as you might need some room to do all the work. Keep the cabinet space clear and ensure all your tools are inaccessible range. 

Measure the Cutout

Up to this point, the necessary measurements may be taken with your Sink already in place. To measure the sink cutout, remove the current Sink first. Hence, this must be one of your very last steps. You may take the measurements the same way you handled the measurements for the Sink, but based on the kind of Sink you have, your measurements may be Different.

The cutout for the undermount Sink must be the same as your Sink. But as a drop-in sink comes with a lip that rests over the counter, the cutout for this Sink must be smaller than the Sink’s measurements. 

Handling Irregular Spaces

Handling irregular spaces shows unique challenges when remodelling or upgrading your kitchen sink. This requires a strategic approach to ensure your new Sink is installed seamlessly. The first step in dealing with irregular spaces is to take exact measurements. Unlike standard spaces, irregular ones may have dimensions that are not uniform. Pay attention to angles and corners that might affect the placement and size of the Sink.

Types of Sink

You might also find it handy to know what type of Sink you’re measuring. If you are aware, there are Different types of sinks, and you can tell which is which by looking at the Sink. If not, here are the sink types, including the undermount Sink.
  • Drop-in sinks are one of the most common types. The drop-in Sink has a thin rim along the upper part of the edge of the Sink, which rests upon the counter.
  • The undermount sink you’re working with doesn’t rest on the countertop. They come with a rim, but the countertop wholly covers it up.
  • Apron sinks are known as farmhouse sinks as well. Unlike the ones mentioned before, the front part of the Sink is exposed instead of covered up by cabinet drawers. This is the kind of Sink that is deeper than the other two.
The kind of Sink you have also impacts how you take the measurements. If you have a drop-in sink, you will measure the edge of its rim, and if you have an undermount sink, you will measure the edge of the opening. You may have to take extra measurements of your apron sink as it is exposed on the front.

Avoiding Common Mistakes

To make this process successful, you must avoid common mistakes such as not letting the Sink fit snuggly in the cutout or leaving spaces for leakages and spills. First, ensure your measurements are accurate. Once you have cut the countertop, there is no going back. And next, you have to assess the kind of sink you need in your kitchen. You can select from so many options available at TORVA. 

They offer the best quality and a wide variety of all the types of kitchen undermount sinks that you may be looking for. You may also get professional help in installation from them at TORVA. Use the provided measurements to determine the precise locations for faucet and pipe holes. You need to complete the position of any of these to avoid causing you a big mess at the end. Ensure your current plumbing is compatible with your new Sink to have running water without any issues later. 

Always ensure you are verifying the manufacturer guidelines beforehand. Different manufacturers might have specific suggestions for measurements and installations. Always consult with the manufacturer’s warranty requirements and specifications. Consider the depth, cabinet space, or faucet height when installing a new sink. Also, review the product description for more information or contact customer support to help you out in any case. 


Precision is all you should seek when installing a kitchen sink. When you’re about to improve your kitchen esthetics by changing the Sink, you want to avoid issues like incorrect measurements at the start. It would help if you understood how to measure a kitchen sink through the steps mentioned above and deeply examine everything you must do to take accurate measurements. 

You have to measure the exact dimensions of the width, length, and depth of your Sink and the cutout. This will save you from trouble when you are about to install the faucet and you can’t find any hole for it or have the Sink in hand but can undermount it because the cutout is too big. 

That can be a disaster, so you need to understand the steps mentioned above and see if your new Sink is ideal for your cutout and doesn’t leave any loopholes. Accurate measurements are the foundation for achieving a perfect kitchen sink. Following these guidelines ensures a smooth installation without mishaps.

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