Kitchen Sink Measuring Guide

Use this guide to prepare your measurements before choosing a kitchen sink. Confirm fit with your installer using the exact model’s specifications.

Step 1 — Identify your installation

Undermount: Mounts below the countertop. Check countertop compatibility, cutout shape, and mounting clearance with your installer.

Drop-in: The rim sits on the countertop. Check the opening, rim coverage, and mounting clips.

Farmhouse: The apron is exposed at the cabinet front. Confirm cabinet modifications, apron dimensions, and support requirements.

For a replacement, start with your existing countertop and cabinet. Follow the instructions for your exact model.

Step 2 — Measure your space

  1. Record the sink-base cabinet’s outside width and clear interior space.
  2. Check the product’s overall dimensions and stated minimum cabinet size.
  3. For replacements, have your installer verify the existing opening against the model-specific template.
  4. Allow space below for drains, plumbing, supports, and any disposal.

Overall sink size is not the cutout size. Do not assume every 33-inch sink fits the same cabinet.

Send us your SKU and measurements for help.

Step 3 — Keep these measurements separate

  • Overall dimensions: The outside size of the sink, as labeled in the product drawing.
  • Interior bowl dimensions: Usable space inside the bowl.
  • Countertop cutout: The opening’s exact size and corner shape, defined by the model’s template.
  • Minimum cabinet size: The manufacturer’s cabinet requirement; also check clear interior space and obstructions.

Step 4 — Check before ordering

  • Exact model or SKU recorded.
  • Cabinet width and interior clearance checked.
  • Cutout and corner shape verified by your installer.
  • Faucet, backsplash, drain, and disposal clearances checked.
  • Supports and cabinet modifications confirmed where required.

Before cutting: Verify the actual sink against the correct template and installation instructions. This page is not a cutting template.

Need help?

Send the product link or SKU, cabinet measurements, existing cutout measurements if known, and photos of the cabinet interior to Kichae support. Your installer should confirm the final installation fit.