How to Measure A Kitchen Sink
It's just four easy steps!
Before buying a new kitchen sink, you need to make sure it fits. The first step is to see how big your current sink is and how much space you have to work with. Grab a tape measure and learn how to measure a kitchen sink in our guide below.
Before You Measure
Since each sink is measured slightly differently, it is important to know what type of kitchen sink you have currently. If you would like to learn more about these types, read our "How to Choose a Kitchen Sink" guide.
How to Measure A Kitchen Sink
Whether you are replacing a kitchen sink with the same installation type or looking for a new style, you should:
- Determine your project scope.
- Measure your current sink's width and length.
- Measure available counter and cabinet width and length.
- Measure sink depth and cabinet depth.
For more in-depth information on how to approach these four steps, keep reading below.
What You Will Need
Pencil
Paper
Tape measure
Level
Step 1: Determine Your Project Scope
Are you replacing a kitchen sink with the same installation type you currently have or are you trying a new style? Knowing this will change how you measure your kitchen sink.
If you're replacing an existing sink with the same installation type, simply measure the length, width, and depth of your current sink and choose a replacement with the same measurements. That's it, you're done!
However, if you are choosing a new sink installation type, follow the three steps below.
Step 2: Measure Your Current Sink
Measure the length and width of your countertop's existing cutout along with the depth of your old sink. If you currently have a drop-in sink, you may need to go into the cabinet under the sink to measure the opening from below. Measuring the drop-in sink's basin from above will not accurately show how big the countertop opening is. Your replacement sink should be no deeper, wider, or longer than these measurements. If you would like a deeper sink, follow step 4 below.
Step 3: Measure Available Width and Length
Your under-cabinet and countertop space will determine how big your new sink can be. To find your countertop's usable surface space, measure from the front edge of your countertop to the wall, accounting for the thickness of any backsplash. This is the widest your new sink can be. However, if you use up all available space, you will need to use wall-mounted faucets which will include making new holes in your wall and moving plumbing lines. To make this more DIY-friendly, we recommend measuring the base of your faucet and dedicating that amount of countertop space for faucet holes and the rim of a drop-in sink (if you choose this as a new style). If you're measuring for a farmhouse sink, remember that it's okay for this style to jut out slightly from the face of your counter.
Next, you'll need to find the interior length of the cabinet space underneath. Go into your cabinet and measure from left to right (side to side), and then subtract three to four inches from the total length to account for sink-mounting hardware needed on either side. To ensure your cabinet can accommodate your new sink, this measurement should be no less than the "Minimum Base Cabinet Width" listed under the sink's specifications.
Step 4: Measure Sink Depth and Cabinet Depth
Lay a level or straightedge across the top of your sink. Measure from the deepest part of your sink to where the measuring tape and straightedge meet. Most sinks do not have a flat bottom to allow for better drainage, which is why it is important to note the deepest part of your sink. Remember that a new undermount sink will be slightly deeper than the product's labeled depth as there will be an inch or two of countertop above it.
If you want a deeper sink than you have now, make sure to check under your cabinet to ensure the new sink you want clears any structural elements or immovable objects – such as plumbing pipes, electrical connections, and garbage disposals – and offers enough clearance for drain assembly. When measuring for a farmhouse sink, which sits flush with the surrounding cabinets, you'll need to measure the distance between the top of your counter and the top of the cabinet doors beneath it. This measurement will dictate the maximum depth your sink can be.
Tip!
If you are interesting in buying a kitchen sink grid, measure the width and length of the sink's basin. While taking measurements, take into account the curve of the basin's edges. This will also affect the shape of the grid you choose.
