Access checker
Will it fit through the door
Enter the piece and the route into the place. The same geometry runs in the planner, including the turn formula that a plain diagonal gets wrong.
It does not fit
Blocked at The stairs. The L turn reaches 8.5 in and the piece is 84 in long, short by 76 in. Removing the legs buys back the leg height on the tightest dimension.
Plan the whole placeWhy a turn is the hard part
Doors are simple: the two smallest dimensions have to clear the opening. A corner is not. A long piece pivoting between two runs is limited by the ladder-around-a-corner result, with the piece’s own thickness taken off both runs first, because the far face has to stay inside the corridor through the whole sweep.
L = (a^(2/3) + b^(2/3))^(3/2)
This is why a 36 inch stair with a 36 inch landing refuses almost any sofa while a 48 inch stair onto a 72 inch landing takes one comfortably. Measuring the diagonal of the landing and comparing it to the sofa gets both wrong.
What to measure
- Every doorway on the route, at the narrowest point, with the door open.
- Stair width between handrails, not between walls.
- The landing, both directions, at the tightest corner.
- Headroom under any low beam or soffit on the way.
- The piece itself, at its widest, including feet and arms.
Measurements are yours and results follow from them. This is guidance for planning a move, not a guarantee.