How to Measure Your Kitchen Sink?

Before you embark on buying a new kitchen sink, it’s crucial to ensure it fits seamlessly into your kitchen. Accurate measurements are key to a successful installation. In this comprehensive guide, we will walk you through the process of measuring your kitchen sink, whether you’re replacing an old one with the same style or exploring new installation types. We’ll cover everything you need to know, from project scope to sink depth and cabinet compatibility.

What You Will Need

What if my new sink is slightly smaller than the old one

Before you start, gather the following materials:

  • Pencil
  • Paper
  • Tape measure
  • Level

Determine Your Project Scope

The first step in measuring your kitchen sink is to determine your project scope. Are you replacing your current sink with the same installation type, or are you opting for a new style? The choice of installation type will influence how you measure your kitchen sink.

If you’re replacing an existing sink with the same installation type, the process is straightforward. Measure the length, width, and depth of your current sink and select a replacement with the same dimensions. However, if you’re considering a new installation type, follow the steps below.

Measure Your Current Sink

For those replacing an old sink with the same installation type, start by measuring your existing sink. Measure the length and width of your countertop’s cutout, along with the depth of your old sink. If you have a drop-in sink, remember that measuring the basin from above won’t accurately represent the size of the countertop opening. You may need to measure the opening from below the cabinet. Your new sink should not exceed the measurements of your current one in terms of depth, width, and length.

Measure Available Width and Length

The available space beneath your kitchen countertop and within your cabinet determines the size of your new sink. To find the usable surface space on your countertop, measure from the front edge of the countertop to the wall, taking into account the thickness of any backsplash. This measurement represents the maximum width of your new sink.

If you intend to use all available space on the countertop, be prepared to install wall-mounted faucets, which will require new holes in the wall and adjustments to plumbing lines. To simplify the process, measure the base of your kitchen faucet and allocate that amount of countertop space for faucet holes and the rim of a drop-in sink (if you choose this style). For those considering a farmhouse sink, remember that this style can protrude slightly from the face of your kitchen counter.

Next, measure the interior length of the cabinet space underneath your sink. Measure from left to right (side to side) within the cabinet, and subtract three to four inches from the total length to account for sink-mounting hardware on both sides. This measurement should align with the “Minimum Base Cabinet Width” specified in your chosen sink’s specifications.

Measure Sink Depth and Cabinet Depth

Measure Sink Depth and Cabinet Depth

To measure the sink depth, place a level or straightedge across the top of your sink. Measure from the deepest part of the sink to where the measuring tape and straightedge intersect. Note that most sinks have a non-flat bottom to facilitate drainage, so it’s essential to measure the deepest point.

If you desire a sink that’s deeper than your current one, check under the cabinet to ensure the new sink has sufficient clearance from structural elements and immovable objects, such as plumbing pipes, electrical connections, and garbage disposals. This step is especially important when considering a farmhouse sink, which should align with the top of the cabinet doors beneath it. This measurement will dictate the maximum depth your sink can be.

Additional Tips

If you plan to purchase a kitchen sink grid to protect the bottom of your sink, measure the width and length of the sink’s basin. Ensure that the sink grid is a similar size or slightly smaller to fit and protect the basin properly. Pay attention to the curve of the basin’s edges, as this will impact the choice of grid shape.

Also Check:


What if my new sink is slightly smaller than the old one? 

If your new sink is slightly smaller, you may need to make adjustments to the countertop cutout and cabinet space to ensure a proper fit. Consult with a professional if needed.

Can I change the sink style without major renovations? 

Changing the sink style may require adjustments to the countertop, plumbing, and cabinet. Consider the scope of your project and consult with a contractor if necessary.

How can I ensure proper drainage with a deeper sink?

When installing a deeper sink, make sure there is sufficient clearance under the cabinet for plumbing and drainage components. Consult with a plumber if needed.

What should I do if my cabinet space is smaller than the recommended “Minimum Base Cabinet Width”? 

If your cabinet space is smaller, you may need to choose a smaller sink that fits within the available space or consider cabinet modifications if feasible.


Measuring your kitchen sink accurately is essential for a successful installation. Whether you’re replacing your sink with the same style or exploring a new installation type, these steps and tips will help you ensure a seamless fit. Taking precise measurements will save you time, money, and the headache of ill-fitting sinks. So, grab your tape measure, follow our guide, and enjoy your perfectly sized kitchen sink.