Across the room, an island kitchen needs the wall counter (25½ in), a work aisle (42 in for one cook, 48 in for two), the island (40½ in deep with stools) and room behind the stools (36 in to edge past, 44 in to walk past): about 12 ft for one cook. An L with an island and two stools passes every check in a 13 × 13 ft room; a U with an island needs about 16 ft across.
The room math
| Across the room | One cook | Two cooks | Source |
|---|---|---|---|
| Wall counter | 25½ in | 25½ in | Caesarstone, Wolf |
| Work aisle | 42 in | 48 in | NKBA |
| Island with stools at a 36 in counter | 40½ in | 40½ in | 24 in cabinets, 1½ in lip, 15 in knee space (NKBA) |
| Behind the stools | 36 in (edge past) | 44 in (walk past) | NKBA |
| Wall to wall | 144 in (12 ft) | 158 in (13 ft 2 in) | our arithmetic |
Without stools the island can be 25½ in deep, like a wall counter, and needs only a 36 in walkway behind it: 10 ft 9 in across for one cook. Along the island, add a 36 in walkway past each open end, and 24 in of island per stool.
A standard fridge stands about 9¾ in past the counter, and NKBA measures the aisle from the fridge door. When the fridge faces the island, the planner moves or shortens the island to keep the 42 in.
Island kitchens, measured
- Narrowest aisle: 42 in
- Work triangle: 22 ft 4 in
- Counter: 15 ft 9 in
One wall plus an island
The simplest island kitchen: every appliance on the wall, the island 42 in in front of it with 48 in walkways past its ends. The island adds 8 ft of counter, so the kitchen has 15 ft 9 in in all, where the wall alone has 7 ft 9 in. The fridge, at the far left, has 30 in of counter beside it, shared with the range.
- Room: about 12 ft deep with a wall behind the stools, less if they face an open room as here.
- Narrowest aisle: 42 in
- Behind the stools: 38¼ in
- Work triangle: 18 ft 5 in
- Counter: 14 ft 6 in
L plus an island
The island sits at least 42 in from both legs and from the fridge door. The stools have 38¼ in behind them, enough to edge past, and the island’s far end has a 40½ in walkway. The triangle is 18 ft 5 in.
- Room: 13 × 13 ft for a 4 ft island; the L-shaped kitchen page has an open-plan version with an 8 ft island.
- Narrowest aisle: 42 in
- Behind the stools: 36 in
- Work triangle: 17 ft 4 in
- Counter: 27 ft 3 in
U plus an island
The island needs an aisle to the back counter and to both legs: 42 in and 43½ in here, with 36 in behind the stools. That is the most counter of any plan on this site, 27 ft 3 in, but the room has to be at least 15 ft 3 in across: two counters, two aisles and a 4 ft island.
Rooms an island won’t fit
A 10 × 10 ft kitchen can’t take an island with NKBA’s aisles: even a 25½ in island without stools needs 10 ft 9 in across the room, and a 4 ft island with a 36 in walkway past each end needs 10 ft along it as well. In those rooms a peninsula fits where an island doesn’t, because its attached end needs no aisle; a rolling cart gives you the extra counter without the aisle.
An island with a sink or a stove
An island can hold the sink or the cooktop instead of only counter. A sink in the island lets whoever is washing up face the room; a cooktop needs 9 in of counter behind it at the same height, NKBA says, and a range hood or downdraft vent above or beside it. Both need plumbing, wiring or gas run through the floor: work for licensed trades and a permit. They get their own pages: kitchen islands with a sink and kitchen islands with a stove. Try either in the planner: set “The island or peninsula holds”.
Two islands
A second island is a second aisle. Between two islands keep NKBA’s 42 in if someone works at either one, or 36 in if the second island is only for seating and passing by. A work island and a seating island side by side need about 17 ft 7½ in across: the wall counter, two 42 in aisles, a 25½ in island, a 40½ in island and 36 in behind its stools. The planner draws one island for now.
Questions people ask
How much space do you need around a kitchen island?
42 in on the sides you cook at for one cook, 48 in for two, 36 in on sides you only walk past, and 36 to 44 in behind any stools (NKBA). The space between island and counter page has a checker.
What is the minimum room size for a kitchen island?
About 12 ft across for a one-wall kitchen with a stool-height island, and 13 × 13 ft for an L with an island and two stools.
Can you put an island in a 10x10 kitchen?
Not with NKBA’s aisles. A peninsula or a cart fits; see the 10x10 kitchen layouts.
How big should a kitchen island be?
At least 24 in of length per stool, and 40½ in deep with stools at a 36 in counter. The kitchen island dimensions page has the full table.
Sources
- NKBA’s free Kitchen Planning Guidelines with Access Standards: work aisles (42 in for one cook, 48 in for two), walkways (36 in), the work triangle (each leg 4 to 9 ft, 26 ft in all), landing areas beside the sink, cooktop and fridge, the dishwasher’s place and standing room, and seating clearances. This is the older free edition; the paid 5th edition (June 2026) may change some numbers.
- Caesarstone: the standard depth of kitchen countertops, 25½ in (24 in cabinets plus a 1½ in overhang)
- Wolf Classic Cabinetry product specifications: base cabinets 34½ in high and 24 in deep, stock widths 9 in and 12 to 42 in in 3 in steps (45 and 48 in by special order), wall cabinets 12 in deep
- Samsung “Will it fit” sheets for a counter-depth (28¾ in to the door front) and a standard-depth fridge (34¼ in to the door front); the planner adds 1 in behind, as KitchenAid’s guide asks
Checked 19 October 2026. The plans are drawn and measured by our planner; room sizes are wall to wall.