What Size Sink Fits a 30-Inch Cabinet?
What Size Sink Fits a 30-Inch Cabinet?
A quick, measurement-based answer for homeowners and contractors choosing a sink for a 30-inch sink base cabinet.
Short answer: a 27-inch sink.
Most 30-inch sink base cabinets fit a sink about 27 inches wide. A 30-inch sink usually needs a 33-inch cabinet. The number that decides it is the sink's minimum base cabinet size, which every manufacturer lists on the spec sheet. If it says 30 inches, it fits a 30-inch cabinet.
Have a different cabinet size? Enter your exact cabinet width in our free sink size calculator to get the largest sink that fits.
Use the sink size calculatorWhy a 30-inch cabinet doesn't fit a 30-inch sink
Cabinet sizes describe the outside of the box. The side walls take up space, so the opening inside a 30-inch cabinet is narrower than 30 inches. The usable interior width is narrower than the cabinet's nominal 30-inch width because of the cabinet walls and construction. An undermount sink also needs room around its rim for the mounting clips, and the countertop needs enough material on each side of the cutout to stay strong.
That's why the common rule of thumb is sink width = cabinet width minus about 3 inches. Our Ruvati catalog follows this pattern: the 27-inch Gravena undermount (RVH7127) lists a 30-inch minimum cabinet, while the 30-inch version of the same sink (RVH7300) lists a 33-inch minimum.
Cabinet size to sink size at a glance
| Sink base cabinet | Typical max sink width | What to check |
|---|---|---|
| 30" | 27" | Sink spec sheet lists a 30" minimum cabinet |
| 33" | 30" | Sink spec sheet lists a 33" minimum cabinet |
| 36" | 33" | Sink spec sheet lists a 36" minimum cabinet or less |
These are typical figures. The manufacturer's minimum base cabinet size always takes priority over the rule of thumb.
How to measure your cabinet
- Measure the outside width of the sink base cabinet, side to side, at the front. This is your cabinet size (30", 33", 36").
- Measure the inside opening between the side walls. This tells you how much room the bowl and mounting hardware actually have.
- Check the sink's minimum base cabinet size on its product page or spec sheet. It should be equal to or smaller than your cabinet.
- Measure front-to-back depth if you're replacing a countertop or choosing a deep sink. Most 27-inch sinks run 18 to 22 inches front to back.
- Look for obstacles under the sink: plumbing, a garbage disposal, a water filter, or a false-front tip-out tray that could interfere with a deeper bowl.
Already have your measurement? Plug it into the sink size calculator to see your maximum sink width.
Does installation type change the answer?
Undermount
Undermount sinks hang below the countertop on clips or brackets, so they need clearance inside the cabinet. A 27-inch undermount is the standard choice for a 30-inch cabinet.
Farmhouse (apron-front)
Farmhouse sinks replace part of the cabinet face, so a standard sink base usually has to be cut down or swapped for a farmhouse-specific base. The width rule is similar: look for a 27-inch apron-front sink with a 30-inch minimum cabinet. Plan for the apron height too, since the front panel of the cabinet gets shorter.
Drop-in (top-mount)
Drop-in sinks rest on the countertop with a visible rim. They still need to fit the cabinet below, so follow the manufacturer's minimum cabinet size the same way.
Thinking about a 28-inch sink? Some 28-inch models are designed for 30-inch cabinets, but it depends on the exact sink and your cabinet's interior width. Check the spec sheet, measure the inside opening, and ask us if you're unsure.
27-inch sinks that fit a 30-inch cabinet
These sinks from our catalog all list a 30-inch minimum base cabinet size. Always confirm the full specifications on the product page before ordering.
Ruvati Gravena 27" Undermount Single Bowl (RVH7127)
- Minimum cabinet: 30"
- 27" W × 18" front to back
- 10" bowl depth
- 16-gauge stainless steel
- Tight 10mm corners, rear drain
Ruvati 27" Slope-Bottom Offset Drain Undermount (RVH7470)
- Minimum cabinet: 30"
- 27" W × 19" front to back
- 10" bowl depth
- 16-gauge stainless steel
- Offset drain frees up cabinet space
Ruvati Veniso 27" Workstation Undermount (RVH8570)
- Minimum cabinet: 30"
- 27" W × 19" front to back
- 10" bowl depth
- 16-gauge, sloped bottom, offset drain
- Includes cutting board and drying rack
Ruvati Verona 27" Apron-Front Workstation (RVH9050)
- Minimum cabinet: 30"
- 27" W × 22" front to back
- 10" bowl depth, 9" apron
- 16-gauge stainless steel
- Includes colander, cutting board, rack
Frequently asked questions
Can a 30-inch sink fit in a 30-inch cabinet?
Usually not. Most 30-inch sinks list a 33-inch minimum base cabinet because the cabinet's side walls make the interior narrower than 30 inches. Check the sink's minimum cabinet size to be sure.
What is the minimum cabinet size for a 27-inch sink?
Most 27-inch kitchen sinks are designed for a 30-inch sink base cabinet. Every Ruvati 27-inch sink shown on this page lists 30 inches as its minimum.
Does a farmhouse sink need a special cabinet?
Usually, yes. An apron-front sink replaces part of the cabinet's face frame, so you'll either modify a standard sink base or use a cabinet built for farmhouse sinks. The cabinet width rule is the same: a 27-inch farmhouse sink typically needs a 30-inch cabinet.
Will a double-bowl sink fit a 30-inch cabinet?
Some smaller double-bowl sinks are made for 30-inch cabinets, but each bowl ends up fairly narrow. Many people with a 30-inch cabinet choose a single bowl, or a workstation sink, for more usable space.
Do I need to measure the inside or outside of the cabinet?
Both. The outside width tells you the cabinet size that manufacturers reference. The inside opening confirms there's room for the bowl and mounting hardware in your specific cabinet.
Keep shopping
Specifications on this page come from manufacturer product data. Cabinet construction varies, so confirm measurements before ordering. Questions about fit? Email sales@rtakb.com.