Hallway Corner Turn Calculator
Enter an item’s length, width, and height, the clear widths of both hallways, and the ceiling height to see whether it can get round a 90° corner — carried level, stood on end, or tilted — and the longest item that could.
Hallway Corner Turn Calculator calculates in your browser.
Work out whether furniture can turn a hallway corner
A hallway corner stops more furniture than doorways do. Seen from above, an item carried round a square corner is a rectangle, and how long a rectangle can get from one hallway into the other depends on both hallway widths and the item’s width — a classic geometry problem with an exact answer for a rigid item carried level. This calculator works that answer out for every carrying position you allow, including standing the item on end and holding it tilted under your ceiling, and shows the longest item that could make the turn. When only a manoeuvre it can’t check — changing the tilt mid-turn, or using the extra room at a T-junction — might work, it says so instead of guessing. It is for anyone moving long furniture through a home or planning a delivery route.
How to use the Hallway Corner Turn Calculator
- Choose your unit and enter the item’s length (longest side), width, and height.
- Choose how it may be carried: upright and level, upright with one end lifted, or any side, end, or angle.
- Measure the clear width of the hallway you come from and the one you turn into at their narrowest points near the corner, and the lowest ceiling height there.
- Say whether the corner is a plain corner, a T-junction, or not square.
- Read the result, the longest item that can make the turn, and each position checked.
How the check works
Longest that can pivot = min over angle φ of (A − w·cos φ)/sin φ + (B − w·sin φ)/cos φ
Sliding through without turning: length ≤ B and width ≤ A, or length ≤ A and width ≤ B
Tilted at θ: footprint length = L·cos θ + h·sin θ, height needed = L·sin θ + h·cos θ
Examples use two 36 in hallways and a 96 in ceiling. An 84 in sofa carried level is 48 in too long for this corner, but stood on end it is only 36 × 34 in from above and slides round. At a T-junction the extra room past the turn isn’t modelled, so a 70 in item that fails the plain-corner check gets “additional measurements required” rather than a no.
| Item (L × W × H) | Carried | Turn | Result | Longest that turns |
|---|---|---|---|---|
| 60 × 20 × 30 in | Upright and level | Corner | Likely fits | 61.82 in |
| 84 × 36 × 34 in | Upright and level | Corner | Does not fit under the conditions checked | 36 in |
| 84 × 36 × 34 in | Any side, end, or angle | Corner | Likely fits | 36 in |
| 70 × 20 × 30 in | Upright and level | T-junction | Additional measurements required | 61.82 in |
Calculated on your device
- The check runs in your browser as you type; nothing is sent to a server.
- Your measurements and results are not sent to Looty Tools or stored.
- The calculator area, including the diagram, is masked from session-recording analytics, so what you enter isn’t captured in recordings.
Limitations
- Items are rigid boxes, and corners are square with straight walls; trim, radiators, and handrails are covered only by measuring the narrowest clear width.
- Holding a tilt all the way round is checked exactly; changing the tilt during the turn isn’t, so when only that could work the answer is “additional measurements required”.
- T-junctions are checked as plain corners, which is on the safe side; angled and curved turns are not modelled.
- This is not a 3D collision simulation: doors opening into the hallway, light fittings, and items in the way are not considered beyond the ceiling height you enter.
- Sizes up to 100 ft (30.48 m) in inches, feet, centimeters, or meters.
Related calculators
- Will My Sofa Fit Through the Door CalculatorCheck whether a sofa can pass through a doorway.
- Furniture Through Doorway Fit CalculatorCheck whether a piece of furniture can pass through a doorway.
- Mattress Through Doorway Fit CalculatorCheck whether a mattress can pass through a doorway.
- Stairwell Furniture Clearance CalculatorCheck whether furniture clears a stairwell.
Guides
- Sofa Delivery ChecklistWalk the route from the curb to the room before ordering a sofa: what to measure at each door, corner, and staircase, and what each measurement decides.
- Hallway Corner Length LimitThe exact limit on how long a rigid item can be and still turn a square hallway corner, with a table for common hallway and furniture widths and what changes it.
- Standing Furniture on EndWhy standing a sofa on end gets it round a corner it can’t turn level, when lifting one end helps and when it makes things worse, and how much ceiling it takes.
- Measuring a HallwayWhat to measure in a hallway before moving furniture round a corner: the narrowest clear widths, the lowest point overhead, the kind of turn, and the obstacles people miss.
- Stair Landing TurnsWhy L- and U-shaped landings are harder than hallway corners, the room needed to spin an item on a landing, and the options when the landing is smaller than that.
Hallway Corner Turn Calculator FAQ
- How long an item can turn a hallway corner?
- It depends on both hallway widths and the item’s width. For two 36 in hallways, a rigid item 20 in wide can pivot round the corner if it is no longer than 2√2 × 36 − 2 × 20 ≈ 61.8 in. A 60 in item makes it; a 62 in one doesn’t, carried level.
- Why does standing a sofa on end help?
- Seen from above, a sofa stood on end is only as big as its depth and height. An 84 × 36 × 34 in sofa carried level can’t turn between two 36 in hallways, but stood on end its 36 × 34 in footprint slides round — if the ceiling is above 84 in.
- Does lifting one end help?
- Only when tilted steeply, and only with headroom. Lifting an end makes the item look longer from above until the tilt passes twice atan(height ÷ length); beyond that it gets shorter but taller. The calculator checks each tilt held all the way round under your ceiling.
- Why do I sometimes get “additional measurements required”?
- When the honest answer depends on something the measurements don’t cover: changing the tilt during the turn, extra room at a T-junction, or a corner that isn’t square. It only says no when the item can’t travel the hallway at all, or when it must stay level and no level position can turn the corner.
- Where should I measure the hallway?
- At its narrowest clear width near the corner — door frames, radiators, skirting, and handrails all count — and the lowest point of the ceiling, including lights and beams. A corner turn is decided by the tightest few inches.
- Are the measurements I enter sent anywhere?
- No. The check runs in your browser as you type. Your measurements and results are not sent to Looty Tools or stored, and the calculator area is masked from session-recording analytics. Refreshing the page clears it.
