Furniture fit calculator
Enter the three dimensions of the furniture and the clear width and height of the door opening, in the same unit. The calculator tells you whether it fits straight through, is tight or will not go.
Runs in your browser: nothing you enter is sent anywhere.
How to use it
- Measure the furniture: length, width and height at the largest points.
- Measure the door opening at its narrowest and lowest point, with the door open.
- Enter everything in the same unit and set how much room you want for hands and fingers.
- Read the result and the spare room on both sides of the opening.
How it works
The calculator sorts the furniture dimensions from smallest to largest. The two smallest, a and b, are the cross-section that must pass through the opening. The door sides are sorted too, narrow q and wide p. The piece goes straight through when b + margin is at most p and a + margin is at most q. If it fits with no margin but not with your margin, the result is tight.
Worked example
A sofa measuring 220 x 90 x 85 and a door that is 80 wide and 200 high. The smallest two sofa dimensions are 85 and 90. The door gives 200 for its larger side, leaving 200 - 90 = 110 spare, and 80 for its smaller side, leaving 80 - 85 = -5. The sofa does not fit straight through. With a 90 wide door the spare room is 5 and the result is fits (with a 2 margin).
Tips
- Take off removable legs, cushions and doors first; they often decide the result.
- Plan the route as well: stairs, landings and turns can be harder than the door.
- Measure twice; a few millimeters matter on tight fits.
Frequently asked questions
Which unit should I use?
Any one unit for all fields, for example centimeters or inches. The calculator only compares the numbers, so the spare room is shown in the unit you typed.
How is the fit decided?
The two smallest dimensions of the furniture form the cross-section that has to pass through the opening, with the longest side travelling through. That cross-section must fit the door's width and height with at least your margin to spare.
What does a negative spare room mean?
The piece is larger than the opening on that side by that amount when carried straight. Tilting, removing legs, doors or the door itself can sometimes win back a few centimeters.
Does it check hallways, stairs and corners?
No. Only a straight pass through one rectangular opening is checked. Turning a long piece around a corner or up stairs needs more room than the door alone, so measure those spots too.
What is the clear door opening?
It is the space you can actually use, measured between the door stops with the door open at 90 degrees. Take the narrowest width and the lowest height, since hinges and handles reduce it.