How To Measure For A Kitchen Sink

It's crucial that you find a kitchen sink that fits perfectly with the space you have. We're here to guide you on the process of measuring for and deciding on a sink.

How to Measure for a Kitchen Sink - Kohler Mayfield Drop-In Kitchen Sink How to Measure for a Kitchen Sink - Kohler Mayfield Drop-In Kitchen Sink
The Hausera Editorial Team

Updating an old, dull kitchen sink is an easy way to rejuvenate your kitchen without breaking the bank. With the right measurements, replacing a drop-in sink is a simple, DIY-friendly project you can complete in a couple of hours. Keep reading to learn how to accurately measure for a kitchen sink and get it right the first time.


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Prepare Before You Measure

  • Tape Measure
  • 36" Straightedge Ruler
  • Pencil & Paper

Measuring Your Old Sink

Before you choose a new kitchen sink, measure the old sink and the countertop cutout to ensure a perfect fit. To replace a drop-in kitchen sink you’ll need the following dimensions:

  • The length, width and basin depth of the existing sink
  • The distance from the edge of the countertop to the lip of the old sink
  • The length and width of the counter cutout

Follow along below, take your time and measure twice!

Measure The Sink Length

Face the front of the sink as if you were washing the dishes. Place the end of your measuring tape on the left edge of the sink, and measure from left to right across the entire sink to the opposite edge. Markdown the length so you can refer to it later.

Measure The Sink Width

The sink's width should be taken from back to front. Start at the back edge of the sink (faucet side) and measure across the basin to the front edge. Markdown the width alongside the length.

Measure The Basin Depth

To measure the sinks basin depth take a straightedge ruler or level, and lay across the top of the sink. Make sure it crosses over the deepest part of the sink. Use your measuring tape to measure from the deepest part of the sink basin to the bottom of the straightedge. Record the depth of the sink.  

Measure The Lip

The space between the edge of the countertop and the edge of the sink is called the lip. In most kitchens, the lip is no greater than 1 inch. Still facing the front of the sink, measure from the front edge of the countertop to the front edge of the sink. Write down the lip measurement.

Measure The Sink Cut Out

In order to take the next set of measurements, you will need to remove your old sink. To remove the old sink: 

  • Shut off the cold and hot water valves leading to the faucet
  • Disconnect the water lines and remove the faucet
  • Disconnect the drain attachments
  • Remove the old sink from the countertop.

With the old sink out of the way, measure the length and width of the cutout. Mark them down, but make sure you can clearly identify the countertop dimensions from the measurements taken from the old sink.

Pay attention to the corner radius of the cutout. If the corner radius is smaller on the replacement sink and the lip is too small, it won't cover the cutout completely. You don’t need to calculate the radius of the corners, just be mindful about whether the new sink will adequately cover the gaps. 


It's crucial that your kitchen sink fits into the space of your countertop, so to make sure that you're purchasing something that works, do careful measurements. Measure your old sink and the countertop all around: the length and width of the sink basin, the space between the sink and the wall and the space between the sink and the edge of the countertop. Measuring will take a lot of time and patience. So get your tape measure and get to it!