Walkway and circulation widths at home

The four widths, and when each one applies#

Circulation is not one number. It is four, and picking the wrong one is how a room ends up feeling cramped despite having enough square footage.

36 in (91 cm) is the primary route. Front door to kitchen, hall to stair, the diagonal across a living room that everyone actually walks. It is the minimum hallway width in IRC R311.6, so it is already the dimension your house was framed to. One adult carrying a laundry basket or a tray passes through it without adjusting.

30 in (76 cm) is a secondary route. Down one side of a bed, behind a run of dining chairs when nobody is seated, between a sofa arm and a bookcase. One person walks straight through. Two do not.

22 to 24 in (56 to 61 cm) is a squeeze, and it is only legitimate over a short distance. Stepping between a sofa and a coffee table is a squeeze. A 4 ft (1.2 m) run of it is fine. A 12 ft (3.7 m) run of it is a corridor you resent.

42 to 48 in (107 to 122 cm) is where two people pass. Below 42 in one of them turns a shoulder. At 48 in neither notices the other.

Route type	Width	Metric	Basis
Absolute squeeze, short run	22 to 24 in	56 to 61 cm	Trade practice, shoulder breadth plus margin
Secondary route, one person	30 in	76 cm	Trade practice
Primary route, one person carrying	36 in	91 cm	IRC R311.6 hallway minimum
Accessible route, sustained	36 in	91 cm	ADA 2010, 403.5.1
Two people passing	42 to 48 in	107 to 122 cm	Trade practice, Neufert
Wheelchair passing a pedestrian	60 in	152 cm	ADA 2010, 403.5.3
Wheelchair turning circle	60 in	152 cm	ADA 2010, 304.3.1

Where the numbers come from#

Shoulder breadth for a 95th percentile adult male is around 20 in (51 cm). That is the static figure. Walking adds arm swing and a lateral sway of an inch or two either side, which is why 24 in is the floor rather than 22 in, and why a 24 in gap feels tighter when you are moving than when you stand in it and measure.

The 36 in figure is not ergonomic, it is regulatory, and that is exactly why it is useful. Because IRC R311.6 fixes hallways at 36 in, every interior door, every furniture delivery route and every set of stock stair dimensions in a US house assumes it. Design your circulation to 36 in and you are aligned with the rest of the building. Design it to 33 in and you have invented a private standard that nothing else in the house respects.

Measure to the furniture, not to the wall#

The number that matters is the clear dimension between the two things you actually walk between. Almost nobody measures it that way on a first pass.

Subtract, in order:

• Sofa arms. A rolled or scrolled arm can overhang the frame by 2 to 3 in (5 to 8 cm) at the widest point. The catalogue depth is measured at the base.
• Overhanging tops. Chests, sideboards and consoles often overhang the carcass by 0.5 to 1 in (1.5 to 2.5 cm) per side. See side table and console heights for the depths these pieces typically run.
• Skirting and architrave. Skirting takes 0.5 to 1 in (1.5 to 2.5 cm) off each wall. A door architrave takes 0.75 in (2 cm) more, at exactly the pinch point.
• Radiators. A panel radiator is 2 to 4 in (5 to 10 cm) deep and is usually in the route.
• Handles and knobs. A cabinet or wardrobe handle projects 1.5 to 2 in (4 to 5 cm) and is at hip height, which is precisely where you catch it.

A 36 in stud-to-stud gap with skirting on one side, a radiator on the other and a chest of drawers with a lipped top can walk at 29 in (74 cm). That is a real loss of one full width class, and it happened without anybody drawing anything wrong.

Door swings overlap circulation, and that is fine#

A hinged door sweeps a quarter circle whose radius equals the door width, so a 32 in (81 cm) door claims a 32 in radius arc. That arc is dead to furniture but it is not dead to circulation: nobody stands still in a doorway. Overlapping a walkway with a door swing is normal and correct.

What is not fine is overlapping a door swing with a seated zone, a drawer pull, or a second door. Two doors whose arcs intersect will collide, and 32 in doors in a corner need at least 32 in between the hinge sides to swing independently. The full geometry, including latch-side approach clearances, is in door sizes, swings and the space they need.

A living room route, drawn#

The 18 in (46 cm) sofa to table gap is a reach dimension, not a walking one, and is covered in sofa to coffee table distance. The 24 in gap beside the armchair is a squeeze you accept because it is 2 ft long. The 36 in band along the media wall is the route that has to hold, because it is how everyone crosses the room.

The two-person and wheelchair widths#

42 in (107 cm) is the point at which two adults pass without either turning. It is worth spending in exactly three places: the hallway that serves more than two bedrooms, the kitchen aisle used by two cooks, and the route between a kitchen and a dining table when food is being carried.

60 in (152 cm) is a different kind of number. It is simultaneously the ADA turning circle diameter (304.3.1), the passing space width (403.5.3) and the practical width for a wheelchair user and a standing adult to pass. If accessibility is on your brief, 60 in appears at junctions and turning points rather than along the whole route: a 36 in route with 60 in pockets is the standard pattern. The full set of residential numbers is in accessible clearances for homes.

How to check yours in five minutes#

Take a tape and a roll of low-tack tape.

1. Stand at the front door. Walk the route you take to the kitchen, then to the sofa, then to the bed. Those are your primary routes.
2. Measure each one at its narrowest point, furniture face to furniture face, at hip height rather than at floor level. Hip height catches handles and overhangs.
3. Write the number on a piece of masking tape and stick it on the floor at that point.
4. Any primary route under 33 in (84 cm) is a problem to solve now, not later. Any under 30 in (76 cm) will change how you use the room.
5. Open every door along the route and re-measure. If the number drops below 24 in with a door open, consider rehanging or converting to a sliding leaf.

Solve them in this order: primary routes first, then door swings, then secondary routes, then the squeezes. Fixing a squeeze usually costs a 6 in (15 cm) narrower coffee table. Fixing a primary route sometimes costs a wall.