Field guide · Kitchen

The 42-inch rule of the kitchen.

Kitchens fail in the aisles, not the cabinets. The clearance standards the NKBA has published for decades, the island sizes that respect them, and what "counter-depth" actually means. Inches throughout.

01

The aisles decide everything

  • Work aisle: 42″ between the island and any counter or appliance — 48″ when two people cook. That's open-dishwasher-and-a-human math, not generosity.
  • Walkway that isn't a work zone: 36″.
  • Appliance fronts are part of the aisle: a dishwasher door drops ~24″ into it; the fridge needs its full 36″ swing-and-stand zone.
  • Seating overhang eats depth: counter stools want ~15″ of knee space under the slab and 21–24″ of width per stool.
42–48″ counter run island 72 × 39 the aisle is measured counter-edge to counter-edge — not cabinet to cabinet
the NKBA work aisle: 42″ solo, 48″ for two cooks
02

Island sizes — and the room they really take

An island's true footprint is the slab plus 42″ on every working side. A 72 × 39 island in the middle of a kitchen commissions a 13 × 10 zone of floor all by itself.

IslandSlabNotes
Compact48 × 36prep + one stool end
Standard60 × 36the common builder island
Large72 × 39sink or cooktop + 3 stools

Smaller than 48 × 24 stops being an island and starts being a cart.

03

Appliances — the numbers on the plan

ApplianceW × DNotes
Refrigerator36 × 33standard-depth — it WILL stand proud of 24″ cabinets
Counter-depth fridge36 × 27sits nearly flush; trades ~20% capacity for the look
Range30 × 26pro ranges run 36–48″ wide
Wall oven30 × 24built-in; door drops into the aisle
Dishwasher24 × 2430″ of standing room in front; 18″ compact exists
Wine cooler15–24 × 24under-counter

"Counter-depth" is the most misunderstood word in appliance shopping: it means the box is ~24–27″ deep so the front face lands even with the counters — doors and handles still stand a few inches proud. A standard 33″-deep fridge in a 24″ cabinet run projects most of a foot into the walkway; the plan should show it.

Draw the aisle before the contractor does.

Drop the island stencil on your actual plan — Poché draws the 42-inch clearance halo and flags the aisle the moment it pinches.

Try it on your plan →
More field guides All guides Dining table sizes → Laundry room dimensions →