kitchen basics · kitchen equipment
Kitchen Sink Measurements: Standard Sizes and How to Measure
Standard sink sizes in inches and millimetres, a chart matching sink widths to base cabinets, and a clear way to measure your cabinet, countertop cutout and existing sink before you order a replacement.
In this guide
Kitchen sinks measurements come down to three numbers: how wide the sink is from left to right, how far it reaches from front to back, and how deep the bowl is. Get those right, check them against the cabinet underneath and the hole in the countertop, and a new sink will drop into place without any surprises on installation day. Below you’ll find standard sizes, a chart in inches and millimetres, a simple way to match a sink to its cabinet, and the measuring mistakes that cause most returns.
What is the standard kitchen sink size?
In most US kitchens, the usual sink is about 22 inches (559 mm) from front to back and 30 to 33 inches (762 to 838 mm) wide, with a bowl 8 to 10 inches (203 to 254 mm) deep. None of that is a legal standard. It comes from the way kitchen cabinets are built.
Base cabinets are usually 24 inches deep and the countertop on top of them is about 25 inches deep, so it overhangs the front slightly. A 22-inch sink on a 25-inch counter leaves around 3 inches to share between a strip of counter at the front edge and the faucet deck at the back. That’s why front-to-back size varies so little between brands while width varies a lot.
Width depends on the sink base cabinet, which is the cabinet built to hold the sink, usually with doors and no drawers. These typically come in 30, 33 and 36 inches wide, and that sets the sink sizes you’ll see most often. Our guide to standard kitchen measurements covers the full set of cabinet, counter and island sizes if you’re planning more than the sink.
Metric kitchens work a little differently. Base units are often 600 mm wide on a worktop about 600 mm deep. Inset single bowls (sinks that sit into a cutout with the rim resting on the worktop) are often around 450 to 510 mm front to back. Sinks with a drainer can be much wider than the unit underneath, because the drainer rests over the neighbouring cabinet. The bowl is what has to fit the sink unit.
Most people looking up kitchen sinks measurements want to know two things: will this sink fit my kitchen, and will it be big enough to use comfortably? The rest of this guide answers both.
Kitchen sinks measurements chart: common sizes in inches and mm
The ranges below are typical, not fixed. Use them to narrow your shortlist, then confirm every number on the product’s specification sheet, which is the manufacturer’s page of dimensions and installation requirements.
| Sink type | Typical width | Front to back | Bowl depth |
|---|---|---|---|
| Bar or prep sink | 15–18 in (381–457 mm) | 15–18 in (381–457 mm) | 6–9 in (152–229 mm) |
| Small single bowl | 24–27 in (610–686 mm) | 18–22 in (457–559 mm) | 8–9 in (203–229 mm) |
| Standard single bowl | 30–33 in (762–838 mm) | 22 in (559 mm) | 8–10 in (203–254 mm) |
| Large single bowl | 33–36 in (838–914 mm) | 22 in (559 mm) | 9–10 in (229–254 mm) |
| Double bowl, equal | 33–36 in (838–914 mm) | 22 in (559 mm) | 8–10 in (203–254 mm) |
| Offset double (60/40) | 33–36 in (838–914 mm) | 22 in (559 mm) | 8–10 in (203–254 mm) |
| Farmhouse (apron front) | 30–36 in (762–914 mm) | 20–25 in (508–635 mm) | 9–10 in (229–254 mm) |
How to read a sink specification sheet
Spec sheets usually give several sets of kitchen sinks measurements, and mixing them up is the most common source of trouble:
- Overall (outside) dimensions: the full footprint, rim included. This is the number in the product name, so a “33-inch sink” is 33 inches across the outside.
- Bowl (inside) dimensions: the usable space at the top of each bowl, usually 1 to 3 inches smaller each way than the overall size.
- Cutout dimensions: the size of the hole in the countertop. Drop-in sinks often come with a cutout template.
- Minimum cabinet size: the narrowest base cabinet the maker says will work. Treat it as a hard limit.
Watch out for the words “length” and “width”. Some brands call the left-to-right measurement length and others call it width. Look at the drawing, not the label. If the sheet is in millimetres and your tape is in inches, the converters in the FoodEase tools will handle the conversion quickly, so you don’t have to round by hand.
How to match a sink to your base cabinet
The usual rule of thumb is that a sink should be about 3 inches narrower than the outside width of the base cabinet. The cabinet’s side panels are usually around 3/4 inch thick each, the face frame (the wooden border around the doors on framed cabinets) narrows the opening further, and the mounting clips need room to fit.
| Sink base cabinet width | Largest sink usually recommended |
|---|---|
| 27 in (686 mm) | 24 in (610 mm) |
| 30 in (762 mm) | 27 in (686 mm) |
| 33 in (838 mm) | 30 in (762 mm) |
| 36 in (914 mm) | 33 in (838 mm) |
| 42 in (1067 mm) | 36–39 in (914–991 mm) |
For a drop-in sink, the rim rests on the countertop and can extend past the cabinet sides. Only the bowl has to fit inside, so you sometimes have an extra inch or so to play with. An undermount sink hangs below the counter on clips, so the whole sink body has to fit between the cabinet walls, and on framed cabinets it has to fit within the face frame opening too.
A worked example
Say you have a 33-inch framed sink base cabinet and want to swap a worn drop-in sink for an undermount one.
- Outside cabinet width: 33 inches.
- Take away two side panels at roughly 3/4 inch each, and the inside width is about 31.5 inches.
- Measure the face frame opening (the gap between the vertical strips at the front). On many framed cabinets this is a couple of inches narrower, perhaps 29 to 30 inches.
- A 30-inch undermount sink is 30 inches across its outside. That’s too tight for a 29-inch opening and only just fits a 30-inch one, with no room for clips or adjustment.
- A 27- or 28-inch undermount is the safer pick for this cabinet. A 30-inch drop-in would also work, because its rim sits on top of the counter.
This is why it pays to read kitchen sinks measurements alongside the cabinet numbers instead of in isolation. The tape measure always wins over the label on the cabinet box.
Apron-front (farmhouse) sinks are a special case. The front of the sink is exposed and replaces the top of the cabinet front, so they need a dedicated apron-front base or a standard base that has been cut down to fit. Follow the manufacturer’s cabinet requirements exactly, because there’s very little room for error.
How to measure for a kitchen sink
You need a steel tape measure, a pencil, paper and a phone camera. Write each number down as you take it and photograph the space under the sink before you start. If you’re redoing more of the room, sketching the whole run of cabinets helps; our guide to kitchen floor plans with measurements shows how to lay that out.
Measuring the existing sink
- Width: measure left to right across the outside of the rim, edge to edge.
- Front to back: measure from the back edge of the rim to the front edge.
- Bowl depth: lay a straight edge across the top of the bowl and measure down to the bottom next to the drain, not at the drain itself.
- Faucet holes: count them (one to four is typical) and measure the distance between their centres if you plan to keep your faucet.
- Drain position: note whether the drain is centred or set towards the back. A different position may mean adjusting the plumbing.
Measuring the countertop cutout
For a straight drop-in swap, the cutout matters more than the old sink. The new sink’s rim must cover the hole fully, and its body must fit through it. From inside the cabinet, measure the opening left to right and front to back. If that’s awkward, take the measurement once the old sink is out. Also note the corner radius, meaning how rounded the corners of the cutout are. A sink with tight, squarish corners may not cover a cutout with wide rounded corners, or the other way round.
If you’re changing from drop-in to undermount, check the countertop material first. Undermount sinks generally need a solid surface such as stone or solid-surface material, because the cut edge is left exposed. Most laminate counters are suited to drop-in sinks.
Measuring the cabinet
- Outside width of the sink base cabinet.
- Inside width between the side panels.
- Face frame opening, if your cabinets have one.
- Inside height from the cabinet floor to the underside of the counter. This tells you whether a deeper bowl plus a waste disposal unit will still clear the cabinet floor.
Measuring around the sink
Check the space behind the sink for the faucet, the height of any window sill above it (a tall faucet can block a window that opens inward), and the countertop either side. A common planning guideline is to keep at least 24 inches of counter on one side of the sink and 18 inches on the other, so there’s somewhere to put dirty dishes and somewhere to put clean ones. If a larger sink would eat into that, the smaller one is usually the better kitchen.
Bowl depth, layout and mounting style
Width and front-to-back size decide whether a sink fits. Bowl depth and layout decide how pleasant it is to use every day.
Bowl depth
Most kitchen bowls are 8 to 10 inches deep. A deeper bowl hides dirty dishes, cuts down on splashing and takes tall stockpots more easily. The trade-off is reach: at a standard 36-inch counter height, a 10-inch bowl means bending further to get to the bottom, which taller cooks usually notice less than shorter ones. A deeper bowl also lowers the drain, which uses up space under the sink. If you plan to keep bins or pull-out organisers down there, measure them against the new drain height first. Our guide to under-sink organization has ideas for working around pipes.
Single, double or offset
- Single bowl: the most usable space for the width. Best for big pans, sheet pans and roasting tins.
- Equal double bowl: handy for washing in one side and rinsing in the other, but each bowl is roughly half the width, so large pans won’t sit flat.
- Offset (60/40 or 70/30): one large bowl and one small bowl. It’s a compromise many cooks like in a 33- or 36-inch sink.
How mounting style changes what you measure
| Style | What sets the limit | Watch for |
|---|---|---|
| Drop-in (top mount) | Countertop cutout and bowl clearance in the cabinet | The rim must fully cover the existing cutout |
| Undermount | Inside cabinet width and face frame opening | Clip space; the countertop must suit an exposed edge |
| Farmhouse (apron front) | Dedicated apron-front base cabinet | Exact cabinet sizing; front height of the apron |
| Inset (metric kitchens) | Manufacturer’s minimum unit width and cutout | Drainer overhang onto the next unit |
Is a 24, 27 or 30 inch sink big enough?
The best way to answer this is to measure the largest things you wash by hand rather than go by the number on the box. Here’s how kitchen sinks measurements translate into everyday use, assuming a single bowl:
- 30 inches: comfortable for most households. A half sheet pan (about 18 by 13 inches) lies flat, and stockpots and roasting tins go in easily. It usually needs a 33-inch base cabinet.
- 27 inches: fine for smaller households and everyday cookware. Sheet pans and big roasting tins may need to go in at an angle. It needs at least a 30-inch base cabinet.
- 24 inches: works in compact kitchens or as a second prep sink. Large pans get washed in stages. It needs a 27-inch base cabinet.
Remember the bowl is smaller than the outside size. A 30-inch sink might have a bowl of about 28 inches, so if your roasting tin is 17 by 13 inches with handles sticking out, check it against the inside measurement on the spec sheet, not the outside width.
Doubles change the picture a lot. A 33-inch equal double gives you two bowls of roughly 15 inches each, which is narrower than a sheet pan. If you batch cook, which is easier to plan with the meal planner, or regularly roast for a crowd, a large single bowl or an offset double with a generous main bowl will save you a lot of awkward washing.
A quick test before you buy: put masking tape on the counter or floor in the size of the bowl’s inside dimensions and set your biggest pan inside it. Ten seconds of checking can save you years of frustration.
Mistakes people make with kitchen sinks measurements
Most sink returns come from a short list of avoidable errors:
- Measuring the old sink instead of the cutout. When you’re replacing a drop-in sink, the cutout is the number that matters. A new sink can match the old one’s outside size and still fail to cover the hole if the rim is narrower or the corners are shaped differently.
- Ignoring the face frame. Undermount sinks on framed cabinets are limited by the opening, not the cabinet’s outside width.
- Treating the product name as the bowl size. “33-inch” describes the outside. The bowl is smaller.
- Forgetting the faucet. Count the holes, check their spacing, and make sure there’s enough deck behind the bowl for the faucet you want. A sink that comes with no faucet holes needs them drilled in the counter instead.
- Going deeper without checking below. A 10-inch bowl plus a waste disposal unit can run into the cabinet floor or crowd out under-sink storage.
- Overlooking the drain position. Moving from a centre drain to a rear-offset drain frees up space below, but the plumbing may need adjusting.
- Mixing units. Imported sinks are often listed in millimetres. Rounding 838 mm “to about 33 inches” is fine. Rounding a cutout by guesswork isn’t.
- Sacrificing counter space. A bigger sink isn’t better if it leaves nowhere to put a chopping board. If the sink sits near the hob, check the counter gaps against our kitchen stove measurements guide too.
Write your final set of kitchen sinks measurements on one page: cabinet outside and inside width, face frame opening, cutout size and corner radius, inside height, faucet hole count and spacing, and drain position. Take that page, or a photo of it, when you shop or speak to an installer. If you’re comparing lots of options or redesigning the whole room, a kitchen planner tool lets you test sink and cabinet combinations on screen before anything gets cut.
Once the new sink is in, setting up the area around it is the enjoyable part. Our kitchen journal has guides on organizing drawers, walls and the cabinet below, and Grandmother’s Kitchen stocks kitchen goods for when you’re ready to kit out the space.
Common questions
What is the standard kitchen sink size?
The most common kitchen sink is about 22 inches (559 mm) from front to back and 30 to 33 inches (762 to 838 mm) wide, with a bowl 8 to 10 inches (203 to 254 mm) deep. The 22-inch depth suits a 25-inch countertop on a 24-inch-deep base cabinet. Width follows the sink base cabinet, which is usually 30, 33 or 36 inches wide.
Is a 30 inch kitchen sink big enough?
For most households, yes. A 30-inch single bowl sink has room for a half sheet pan (about 18 by 13 inches) to lie flat, and it takes a large stockpot or roasting pan without much trouble. It normally goes in a 33-inch base cabinet. If you choose a double bowl at this width, each bowl is fairly narrow, so large pans will not fit flat in either one.
Is a 27 inch sink big enough?
A 27-inch single bowl suits small kitchens and one- or two-person households. It takes everyday pots, colanders and cutting boards, though sheet pans and large roasting pans may sit at an angle. It needs a base cabinet of at least 30 inches. If you cook in big batches or use a lot of large cookware, a 30-inch bowl is worth the extra space when your cabinets allow it.
Is a 24 inch sink big enough?
A 24-inch sink is small but workable in apartments, galley kitchens, kitchenettes, or as a second prep sink. Expect to wash large pans in stages or at an angle, and a double bowl at this width is very cramped. It fits a 27-inch base cabinet. If the only reason for choosing it is a narrow cabinet, look at whether a deeper single bowl would give you more usable room.
How much smaller should a sink be than the base cabinet?
A common rule of thumb is to choose a sink about 3 inches narrower than the base cabinet's outside width, so a 36-inch cabinet takes a sink up to roughly 33 inches. The cabinet's side walls, its face frame, and the mounting clips all take up space. For undermount sinks, check the measurement inside the cabinet and the manufacturer's stated minimum cabinet size.
How do I measure an existing kitchen sink?
Measure the outside edge of the rim from left to right, then from the back edge to the front edge, and measure bowl depth from the drain to the top of the rim. For a drop-in replacement, the countertop cutout matters most, so measure the opening from below or once the old sink is out. Also note how many faucet holes there are and where the drain sits.