Do Sinks Come in Standard Sizes?
Quick answer
Yes, broadly. The most common US kitchen sink is 33 inches wide by 22 inches front to back, about 8 to 10 inches deep, and it fits a 36-inch sink base cabinet. As a rule of thumb, the sink needs to be about 3 inches narrower than the inside of the cabinet, but always check the manufacturer's minimum cabinet size.
Kitchen sinks aren’t built to a legal standard, but most manufacturers make them to fit standard US cabinet and countertop sizes. That makes replacing one easier than it first looks.
Standard kitchen sink sizes
Sink sizes are given as width (side to side) × front-to-back, plus bowl depth.
| Sink | Typical size | Typical minimum base cabinet |
|---|---|---|
| Small single bowl | 24 to 25 in × 22 in | 27 to 30 in |
| Standard single bowl | 30 in × 22 in | 33 in |
| Standard single or double bowl | 33 in × 22 in | 36 in |
| Large single or double bowl | 36 in × 22 in | 39 in |
The 22-inch front-to-back measurement fits a standard 25-inch-deep countertop with room for the faucet behind the sink. Bowls are usually 8 to 10 inches deep; deeper bowls are easier for big pots but harder on your back if you are short.
The “about 3 inches” rule leaves room for the cabinet sides and the sink’s mounting clips. Farmhouse (apron-front) and undermount sinks have their own cabinet requirements, so check the spec sheet.
How to measure for a replacement sink
- Measure the existing sink from the outer edges of the rim, side to side and front to back.
- Measure the countertop cutout if you are keeping the countertop. A drop-in replacement must have a rim large enough to cover the old hole.
- Measure the inside width of the sink base cabinet.
- Count the faucet holes in the sink or countertop, and check whether your faucet and soap dispenser will fit.
- Check the drain position if you have a waste disposal or dishwasher connected.
Single or double bowl?
| Single bowl | Double bowl | |
|---|---|---|
| Best for | Washing large pots, sheet pans and roasting tins | Washing by hand: wash in one side, rinse in the other |
| Works well with a dishwasher? | Yes, most washing goes in the dishwasher | Yes, but you lose some bowl width |
| Small kitchens | Usually better: more usable space for the same width | Each bowl can be too small for big pans in a 30 to 33 in sink |
A “low divide” double bowl is a compromise: two bowls for everyday use, with a lower divider so large pans can lie across both.
Sink mounting types
- Drop-in (top-mount): The rim sits on top of the countertop. Easiest to install and replace, and works with any countertop material, including laminate. Crumbs can collect around the rim.
- Undermount: Mounted beneath the countertop, so you can wipe straight into the sink. Needs a solid countertop such as stone or quartz, and is harder to replace.
- Farmhouse (apron-front): The front of the sink is exposed. Needs a special or modified base cabinet.
- Integrated: Made from the same material as the countertop, so there is no seam. Replacing the sink means replacing that section of countertop.
Sink materials
- Stainless steel: The most common. Durable, affordable and heat-resistant. Thicker steel (a lower gauge number, such as 16 or 18 gauge) dents less and is quieter.
- Composite granite or quartz: Scratch- and stain-resistant, comes in colours, but can crack if hit hard.
- Enamelled cast iron: Very durable glossy finish but heavy, and the enamel can chip.
- Fireclay: Common in farmhouse sinks. Hard-wearing but can chip.