Quick answer
Storage-unit size depends on item volume and how efficiently items can be stacked, not bedroom count alone. Converting household contents to cubic volume and dividing by usable stacking height gives a more defensible floor-area estimate.
How to work it out
- Estimate packed item volume.
- Choose a realistic average stacking height, not the unit’s full ceiling height.
- Reduce usable volume for aisles and irregular furniture.
- Convert the result to required floor area.
- Choose the next available unit size if you need access aisles or expect to add items later.
Example
The same 10×10 unit can feel spacious for uniformly boxed goods and unusable for bulky furniture that cannot stack. Packing efficiency is a major variable.
What can change the answer
Climate control, door size, elevator access and prohibited items can matter more than a small difference in square footage.
Run the calculation with your numbers
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Open Storage Unit Size Calculator