How to measure rooms, doors and stairs for furniture
To measure doorways for furniture, follow the whole path a piece has to travel, not only the room. Record each door's clear opening, the narrowest hallway width, stair and landing dimensions, and the open space at every turn. Compare those with the furniture's width, height and diagonal depth, and round down.
Why to measure doorways for furniture, not only rooms
Most furniture that fails doesn't fail in the room. It fails at the front door, a 90-degree hallway turn or a stair landing. Bel Furniture's guide gives a good example: a 40-inch-wide staircase can still stop an 80-inch sofa if the landing is only 42 inches deep and a railing cuts into the diagonal.
These numbers also tell you what to sell, what to move and what to buy. Your chance to measure may be short, too. If the sellers are still living there, their furniture can hide outlets and vents, so ask your agent for a visit after they move out or use the final walkthrough.
Measure doorways for furniture, then halls, turns and stairs
Use a long tape measure, and write numbers on a sketch of each floor as you go.
| Spot | What to measure | Easy mistake |
|---|---|---|
| Exterior and interior doors | Clear width with the door fully open, from the door to the opposite jamb, plus clear height from the threshold | Measuring the outside of the trim. Hinges, the open door and storm doors all take up space |
| Hallways | Width at baseboard height and at sofa height | Forgetting trim or a radiator that narrows one stretch |
| Turns | Hallway width before and after, plus the diagonal open space at the corner | Treating a turn like a straight run. It can be tighter than the door |
| Stairs | Narrowest width including handrails, ceiling height above every step, and landing width, depth and height | Measuring the treads and ignoring the railing |
| Elevators, if any | Door opening and the inside width, depth and height | Forgetting that protective pads take up room |
| Rooms | Length, width, ceiling height, windows, plus outlets, vents and radiators | Leaving out door swings |
Then measure the furniture the same way. Note overall width, depth and height, plus diagonal depth. Retailers define diagonal depth differently, so ask which method they use. Compare it with the doorway diagonal, measured from one lower corner to the opposite upper corner. One retailer's guide calls this a helpful first check, not a promise. Close calls deserve a phone call to the retailer or delivery crew.
A few numbers help when you plan the layout:
- About 30 to 36 inches for main walkways, and about 24 inches for a secondary path when space is tight.
- About 16 to 18 inches between a sofa and a coffee table.
- For sectionals, the largest single module usually decides whether it fits, not the assembled length.
- For recliners and sleeper sofas, use the fully opened depth.
- Removable feet and loose back cushions can gain you a few inches. Attached backs can't come off.
Round every measurement down, not up. If a piece is close, plan on removing its legs before the movers arrive.
How to measure stairs for furniture and the whole route
- Sketch each floor
Rough boxes are fine. Mark doors, windows, closets, outlets, vents and which way each door swings.
- Measure each room
Record length, width and ceiling height. Add every window so you can order coverings.
- Walk the delivery route
Start at the curb and go to the farthest room. Record each door's clear opening with the door fully open.
- Measure the tight spots
Do the hallways, the corners and the stairs. Include landing depth and the ceiling height above the steps.
- List your big pieces
Measure width, depth, height and diagonal depth, with recliners and sleepers fully open.
- Compare and round down
Mark each piece as fits, close or no. Call the delivery company about anything marked close.
- Tape the layout on the floor
Mark the footprints with painter's tape and check the walkways. A 103-inch sectional left a 34-inch path in Bel Furniture's example, while a 115-inch one left only 22 inches.
Measure a room for furniture when you have kids or pets
Measure for the crib, changing table and any baby gates you plan to use, including stairs and doorways where a gate has to mount. Note where the wall studs are behind tall dressers and bookcases, because CPSC recommends anchoring furniture with drawers, doors or shelves, and TVs, to the wall. You'll need a stud finder, and it's easier before the room fills up.
For pets, measure the crate, the spot for a litter box and any floor space beside the bed. A large dog crate takes up as much planning as a chair. The ASPCA suggests vertical space for cats, so measure wall height for shelving or a cat tower too.
What homeowners say about furniture delivery measurements
Plan the layout, don't just measure. Draw rooms on graph paper or in a free 3D tool, then mark big pieces on the floor with blankets or tape. One neighbor's well-measured plan failed because the recliner couldn't open with the coffee table in place. (Reddit)
Measure every window during a walkthrough so curtains or blinds arrive on move-in day. City owners say privacy was their first need. Measure for big furniture too: one owner's new couch didn't fit. (Reddit)
Will my couch fit through the door? Common questions
How do I know if a couch will fit through a door?
Measure the clear opening with the door fully open, then compare it with the couch's depth, height and diagonal depth. Also check the space on both sides of the door, because the couch needs room to pivot. Treat a close result as a question for the retailer.
What is diagonal depth on a sofa?
It's the measurement used to see if a sofa can be tilted through an opening. Sources define it differently: one measures from the highest point of the back frame to the front underside, another from the top of the back to the front edge of the arm. Ask the retailer which it uses.
How much walkway space should I leave around furniture?
Bel Furniture suggests about 30 to 36 inches for main paths and about 24 inches for secondary paths when space is tight. Leave about 16 to 18 inches between a sofa and a coffee table.
Sources: belfurniture.com, 5280fd.com, anchorit.gov, ASPCA
General guidance for U.S. homes, not professional advice. For gas, electrical and structural work, call a licensed pro.