How to Measure for a Kitchen Sink

Heather Asiyanbi - 6/4/18 12:53 PM

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.


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 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. Mark down 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. Mark down 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 sinks depth.

Measure the Lip

The space between the edge of the countertop and and the edge of the sink is called the lip. In most kitchen, 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.

Measuring the Sink Cutout

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 counter top dimensions from the measurements taken from the old sink.

Pro Tip: Corner Radius

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 of the corners, just be mindful about whether the new sink will adequately cover the gaps.

Replacing Your Kitchen Sink

Shop Kitchen Sinks

With all of the measurements at your disposal, you’re now ready to find a replacement for your old kitchen sink. If you have any questions, speak with one of our product experts at 1-855-613-1406. We’re standing by to help you find the perfect kitchen sink.

Topics: Kitchen- Sink

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