Standard Countertop Dimensions: Height, Depth, Thickness and Overhang
Reference dimensions for kitchen, island, bar and bathroom countertops in inches and centimeters, the thickness of each material, how far a top can overhang for seating, and how big the slabs are that it is cut from.
A standard kitchen countertop is 36 in (91.4 cm) high and 25 to 25 1/2 in (63.5 to 64.8 cm) deep, sitting on 24 in deep base cabinets with a 1 to 1 1/2 in front overhang. Stone and quartz tops are 2 cm (3/4 in) or 3 cm (1 1/4 in) thick; laminate tops are 1 1/2 in (3.8 cm) thick.
- Height
- 36 in (91.4 cm)
- Depth
- 25 to 25 1/2 in
- Stone thickness
- 2 or 3 cm
- Seating overhang
- 12 to 15 in
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Standard countertop dimensions
Kitchen countertop sizes follow the cabinets beneath them. US base cabinets are 34 1/2 in tall and 24 in deep, so a 1 1/2 in top makes a 36 in counter, and the top overhangs the cabinet doors at the front.
| Counter | Height (in) | Height (cm) | Depth (in) | Depth (cm) |
|---|---|---|---|---|
| Kitchen counter | 36 | 91.4 | 25 to 25 1/2 | 63.5 to 64.8 |
| Kitchen island, work side | 36 | 91.4 | 36 to 48 total | 91 to 122 |
| Bar or raised counter | 42 | 106.7 | 12 to 18 (raised ledge) | 30 to 46 |
| Table-height counter or desk | 30 | 76.2 | 24 to 30 | 61 to 76 |
| Bathroom vanity, standard | 30 to 32 | 76 to 81 | 22 | 55.9 |
| Bathroom vanity, comfort height | 34 to 36 | 86 to 91 | 22 | 55.9 |
| Accessible (ADA) work surface | 28 to 34 | 71 to 86 | 24 or more | 61 or more |
| Laundry folding counter | 36, or above front-loaders: about 1 in over the machine tops | 91 | 25 to 30 | 64 to 76 |
The other numbers in a kitchen elevation follow from these: a 4 in (10 cm) toe kick at the bottom of the base cabinet, a 4 in backsplash or a full-height one, and 18 in (45.7 cm) from the counter to the underside of the upper cabinets. Metric kitchens (IKEA and most of Europe) are usually 60 cm deep cabinets with tops about 62 to 64 cm deep and a counter height of about 88 to 92 cm, adjusted by the leg height.
Countertop thickness by material
| Material | Standard thickness | In inches | Notes |
|---|---|---|---|
| Quartz (engineered stone) | 2 cm or 3 cm | 0.79 or 1.18 | 3 cm is the usual US kitchen choice |
| Granite, quartzite, marble | 2 cm or 3 cm | 0.79 or 1.18 | 2 cm normally sits on a plywood subtop |
| Laminate | 3.8 cm finished | 1 1/2 | Thin plastic sheet on a 3/4 in particleboard core with build-up |
| Butcher block | 3.8 cm | 1 1/2 | Also sold about 1 in and 2 1/2 to 3 in thick |
| Solid surface | 12 mm sheet | 1/2 | Edges built up to look about 1 1/2 in thick |
| Porcelain / sintered stone | 12 mm (also 6 and 20 mm) | About 1/2 | Thin slabs usually need full support underneath |
| Poured or precast concrete | 4 to 5 cm | 1 1/2 to 2 | Heavy: about 25 lb per sq ft at 2 in |
Thickness changes the counter height. A 3 cm stone top on a 34 1/2 in cabinet gives about 35 3/4 in; installers shim or add a subtop to reach 36 in. Thin tops also change how far the edge can overhang without support (see below).
Island and peninsula dimensions
An island countertop is the base cabinet depth plus the seating overhang. A one-sided island on 24 in cabinets with a 12 in overhang is 36 to 37 in deep; one with 15 in of knee space is about 40 in deep, and back-to-back cabinets make a 48 in (122 cm) deep island.
| Counter height | Knee space depth | Width per seat | Stool or chair seat height |
|---|---|---|---|
| 30 in (76 cm) table height | 18 in (46 cm) | 24 in (61 cm) | 18 to 20 in |
| 36 in (91 cm) counter height | 15 in (38 cm) | 24 in (61 cm) | 24 to 26 in |
| 42 in (107 cm) bar height | 12 in (30 cm) | 24 in (61 cm) | 28 to 30 in |
At 24 in per seat, a 6 ft island seats three and an 8 ft island seats four along one side. Seats at the end of an island need the same depth of knee space. Around the island, NKBA recommends work aisles of at least 42 in (107 cm) for one cook and 48 in (122 cm) for two or more, and walkways of at least 36 in (91 cm). Behind seated diners, allow about 36 in to a wall where nobody passes and 44 in or more where people walk behind.
How far a countertop can overhang
An overhang that is too long without support cracks stone at the cabinet edge. Typical maximums for an unsupported overhang:
| Top | Unsupported overhang | Notes |
|---|---|---|
| 3 cm quartz | About 10 in (25 cm) | Several major brands publish about this figure; check yours |
| 2 cm quartz | About 6 in (15 cm) | Often laid on plywood, which helps |
| 3 cm granite | About 10 in, and no more than one third of the slab depth | Weaker stones and slabs with fissures need less |
| Laminate, butcher block | About 10 to 12 in | Depends on substrate; longer spans sag over time |
The common 12 in counter-height seating overhang therefore usually needs support under 3 cm stone, and the 15 in recommended for comfort always does. Corbels, flush steel brackets or legs are spaced according to the fabricator's instructions, often about every 24 to 36 in. Warranties can be void if a top cracks at an overhang beyond the maker's limit, so ask the fabricator before planning the island.
Slab and stock countertop sizes
Length is limited by the slab or stock piece. Anything longer needs a seam, and seams are better placed where the fabricator chooses than across a sink or cooktop.
| Material | Typical size | Metric |
|---|---|---|
| Quartz, standard slab | About 120 × 56 1/2 in | About 3050 × 1440 mm |
| Quartz, jumbo slab | About 130 × 65 in | About 3300 × 1650 mm |
| Granite and natural stone | Varies by block; often about 9 to 10 1/2 ft long and 5 to 6 1/2 ft wide | About 2.7 to 3.2 × 1.5 to 2.0 m |
| Prefab laminate | 25 in deep; 4, 6, 8, 10 and 12 ft long | 63.5 cm deep; 1.22 to 3.66 m long |
| Butcher block, stock | About 25 to 26 in deep; 4 to 12 ft long; islands 36 to 42 in deep | About 64 to 66 cm deep |
Exact slab sizes vary by brand, color and finish, so confirm with the supplier. A standard quartz slab covers an island no deeper than about 56 in; a 48 in deep island longer than 10 ft needs a jumbo slab or a seam. Our kitchen cabinet sizes and kitchen sink sizes guides cover the units the top sits on and the cutouts it needs.
How much countertop a kitchen needs
NKBA planning guidelines call for at least 158 in (401 cm) of usable countertop frontage in total, 24 in deep, with at least 15 in of clearance above. They also set landing space next to each appliance:
- Sink: at least 24 in on one side and 18 in on the other.
- Cooktop or range: at least 12 in on one side and 15 in on the other.
- Refrigerator: at least 15 in on the handle side, or directly across within 48 in.
- Prep area: a continuous section at least 36 in wide and 24 in deep, ideally next to the sink.
Appliance sizes that shape these runs are in our guides to dishwashers (24 in wide standard) and refrigerators, and the whole layout is covered in kitchen dimensions.
How to measure for a countertop
- Measure each run along the wall at the back and at the front of the cabinets. Walls are rarely straight; the fabricator will template, but your numbers decide the quote.
- Measure depth from the wall to the face of the cabinet doors, then add the overhang: 1 to 1 1/2 in at the front, plus any seating overhang.
- Work out the area. Multiply length by depth in inches and divide by 144. A 10 ft run at 25 1/2 in deep is 120 × 25.5 ÷ 144 = 21.25 sq ft (1.97 m²). For an L-shape, subtract the overlap at the corner so it is not counted twice.
- Add backsplash and cutouts. A 4 in backsplash adds one-third of a square foot per linear foot. Sinks, cooktops and faucet holes are usually priced as separate items.
Frequently asked questions
How much space should be between the countertop and upper cabinets?
The standard is 18 in (45.7 cm), which puts the bottom of the upper cabinets at 54 in above the floor on a 36 in counter. 15 in is a common minimum; 20 in or more suits tall users and large appliances on the counter. Over a range, follow the hood or microwave maker's clearance, typically 24 to 30 in.
What is counter depth for a refrigerator?
Counter-depth means the fridge case lines up roughly with the 24 to 25 in deep counter, so only the doors and handles stand proud. Most counter-depth models have cases about 24 to 25 in deep without doors, against 29 to 31 in for standard-depth fridges. See our refrigerator dimensions guide for full sizes.
What height is a bar counter?
Bar height is 42 in (106.7 cm), used with 28 to 30 in high stools. Counter height (36 in) pairs with 24 to 26 in stools. Leave about 10 to 12 in between the seat and the underside of the counter. Stool sizes are in our bar stool guide.
How thick is a quartz countertop?
Quartz is sold in 2 cm (0.79 in) and 3 cm (1.18 in) slabs, and some brands offer 1.3 cm (about 1/2 in) for wall cladding and furniture. 3 cm is standard in the US for kitchens without plywood underlayment; 2 cm tops are usually laid on a plywood subtop or given a laminated, thicker-looking edge.
What is the standard height of a bathroom countertop?
Traditional vanities put the top at 30 to 32 in (76 to 81 cm); newer comfort-height vanities are 34 to 36 in (86 to 91 cm). Vanity tops are usually 22 in (56 cm) deep on a 21 in cabinet. See bathroom vanity sizes.
What countertop height is accessible?
Under the 2010 ADA Standards, accessible work surfaces must be 28 to 34 in (71 to 86 cm) high, and an accessible kitchen needs at least one 30 in wide section of counter no higher than 34 in, with knee space below.