ClearanceCalc

Professional Moving & Corridor Fit Engine

Mattress & Box Spring Stairwell Fit Calculator

Moving bedding upstairs introduces complex hurdles: low-sloped ceilings, tight 90-degree landings, and rigid box spring borders that refuse to bend. Plug in your staircase parameters below to figure out if your new bed can make the turn or if you need to opt for a split setup.

1. Object Physical Profile

2. Architectural Constraint

Upstairs Bed Transit Checklist

Avoid getting a massive box spring permanently wedged halfway up your stairwell. Evaluate these structural traits before your delivery arrives:

  • The Rigid Box Spring Bottleneck: Standard King or Queen box springs have a rigid wood/steel frame that cannot bend. If the diagonal height of your staircase ceiling is less than the box spring's width, it will hit the ceiling and jam.
  • Corner Landing Rotations: If your stairs have a 90-degree or 180-degree turn with a landing, you need the landing width and depth to exceed the mattress thickness and width combined to spin it vertically.
  • Split Box Springs Solution: If a solid King box spring fails the calculator check, your easiest solution is buying two Split King box springs (each the size of a Twin XL), which slip around tight stairwells easily.

How to Calculate Moving Clearance

The 90° Hallway Corner Problem

Moving a large sofa or appliance around a 90-degree hallway corner is one of the most common moving challenges. As the item rotates, its depth simultaneously occupies space in both corridors.

ClearanceCalc uses a geometric bound based on the moving sofa problem to calculate the maximum safe length for any corner configuration.

Frequently Asked Questions

Will a solid king size box spring fit up a narrow staircase?

Almost never on staircases with a 90-degree turn or low clearance ceilings. A solid king box spring is 76x80 inches and entirely rigid; it requires a wide clear path or alternative split-box configuration.

Can you bend an all-foam mattress to clear a tight staircase header?

Yes, memory foam and hybrid mattresses without a hard border wire can be safely flexed or temporarily tied into a curved arc to squeeze past tight low-clearance steps.

Clearance Analytics Suite

ClearanceCalc Home Couch Doorway Fit Sectional Turn Radius Fridge Clearance Furniture Workspace 84" Couch · 36" Hallway