Enter the mattress dimensions and the available space to check clearances, orientation, and tight-fit risks.
Whether it fits depends on measurements most people get wrong.
Item dimensions vs. usable around a stair landing dimensions
Item: Varies by model; measure the actual item.
Space: Varies by space; measure the usable interior and opening.
Actual clear openings are usually 1–2″ smaller than the labeled size.
Your exact dimensions probably aren't "standard." Small measurement errors cause big problems — 1 inch can be the difference between fitting and getting stuck.
Verdicts are calculated by comparing all 6 item orientations against the space dimensions using verified building code standards. See our methodology
Takes 10 seconds · No signup needed
“Wish I'd used this before trying to force a fridge up the stairs.” — Lesson learned
Measure smart
Four numbers decide nearly every fit check. Get these right and the rest follows.
Don't make these
Most “it didn't fit” stories trace back to one of these oversights.
Frequently asked
Start with the largest rigid dimension, then check the narrowest opening or turning point. A large item can have enough final space but still fail at the route into that space.
01Yes. Add the package, moving blanket, mattress bag, appliance dolly, or protective padding when that is how the item will actually be moved.
02More like this
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Open the calculator and check any item against any space.
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