Furniture Fit Calculator
Enter the furniture size, its diagonal depth and your door, hallway and stair measurements to see if it fits through each point of the delivery path, plus how it sits in the room.
A sofa fits through a door if its depth or height is less than the door width, or, tilted back, if its diagonal depth is less than the door width and its length is less than the door height or the space beyond the door.
Use the Furniture Fit Calculator
Dimensions
Room
Furniture
Narrowest doorway opening
Wayfair’s measuring guide suggests 4 inches of doorway/hallway space. Change the buffer if your delivery guidance differs.
Tilt through the door (sofas, chairs)
Diagonal depth: cushions off, lay a straight edge across the top of the back and the front of the arm, then measure from the rear bottom corner to that edge. Clearance: from the door to the facing wall of the hallway or room it opens into.
Hallway corner (90°) and stairs
Leave a field blank to skip that check.
Placement
Clearance on each side
| Side | Gap | Status |
|---|
Delivery path checks
- Door, tilted (diagonal depth)
- Hallway corner, carried flat
- Stairs
Diagonal-depth rule from the Darlings of Chelsea sofa fit guide; the corner check models a flat rectangle turned in the floor plane, so standing the piece on end may still work when it says no.
Doorway opening check
Opening-only estimate. Verify packaging, removable parts, door thickness, handles, turns, ceiling height, stairs, elevators, and carrying space.
Floor Plan Preview
Gray = room | Blue = furniture | Orange stripe = tight clearance (< 24 in)
Quick answer
A sofa that is too deep to carry straight through a door can often be tilted through it. Measure its diagonal depth: with the cushions off, lay a straight edge across the top of the back and the front of the arm, then measure from the rear bottom corner to that edge. The sofa should fit if the diagonal depth is less than the door's clear width and its length (arm to arm) is less than the door height or the clearance beyond the door. Around a 90° hallway corner, the longest piece that can be turned flat is the minimum over the angle θ of (a·cos θ + b·sin θ − w) ÷ (sin θ · cos θ), where a and b are the hallway widths and w is the piece's thickness; in two 36 in hallways a 34 in thick sofa can be at most about 33.8 in long to turn flat, so long sofas are stood on end.
Examples
| Situation | Measurements | Result |
|---|---|---|
| Tilt through a door | 32 × 80 in door, 78 in sofa, 30 in diagonal depth | Fits: 30 < 32 and 78 < 80 |
| Tilt through a door | 30 × 80 in door, 84 in sofa, 31 in diagonal depth | No: diagonal depth 31 > 30 |
| Hallway corner, flat | Two 36 in hallways, 34 in thick | Longest piece ≈ 33.8 in |
| Hallway corner, thin | Two 36 in hallways, 1 in thick panel | Longest piece ≈ 99.8 in |
| Stairs | 36 in stairs, piece 34 in thick | Fits the width; check banister-to-ceiling height vs depth |
Enter your furniture and doorway sizes to check every point of the delivery path.
Summary
This calculator checks the whole delivery path. At the door it tests the three flat faces of the piece against the opening with a buffer, then the diagonal-depth method used for sofas: tilt the sofa back so its diagonal depth passes the door width while its length goes up through the door height or into the space beyond. At a 90° hallway corner it finds the longest piece of your furniture's thickness that can be turned flat, and it checks stair width and banister headroom. Finally it places the footprint in the room and shows the clearance on each side. All measurements stay in your browser.
How it works
- Pick inches or centimetres and a furniture preset, or type the length, depth and height.
- Measure the diagonal depth of a sofa or chair (straight edge from the top of the back to the front of the arm, then from the rear bottom corner to that edge).
- Enter the narrowest door opening (clear width and height), the clearance beyond the door, the hallway widths at the tightest corner and the stair width.
- Door: the tool tests each flat face of the piece against the opening with your buffer, then the diagonal-depth (tilt) method.
- Hallway: it finds the longest piece that can be turned flat around the 90° corner for the piece's thickness.
- Stairs and room: it checks the stair width and banister headroom, and shows the room footprint with clearance on each side.
Use cases
- Checking if a new sofa, sectional piece or recliner will fit through the front door before ordering.
- Deciding whether a couch must be carried on end around a tight hallway corner.
- Measuring a sofa's diagonal depth when the retailer does not list it.
- Checking whether a bed, dresser or desk will go up a staircase.
- Planning room layout and walking clearance around a sofa, bed or table.