Storage Unit Size Calculator
Storage Units Are Priced by the Square Foot You Don't Need to Waste
Renting storage space is one of the few moving decisions with a direct monthly cost attached to guessing wrong — too small and belongings don't fit, too large and the extra square footage is paid for every month it sits empty. This calculator maps household size to the unit size that typically holds it.
Reference Table
| Household Size | Unit Dimensions | Approximate Area | Typically Fits |
|---|---|---|---|
| A Few Items / Closet-Sized | 5×5 | ~25 sq ft | A few boxes or closet-sized items |
| Studio / Small 1 Bedroom | 5×10 | ~50 sq ft | Studio apartment / small 1 bedroom |
| 1-2 Bedroom | 10×10 | ~100 sq ft | 1-2 bedroom apartment |
| 2-3 Bedroom | 10×15 | ~150 sq ft | 2-3 bedroom apartment or small house |
| 3-4 Bedroom House | 10×20 | ~200 sq ft | 3-4 bedroom house |
| 5+ Bedroom House | 10×30 | ~300 sq ft | 5+ bedroom house |
Unit dimensions listed are floor footprint only — most facilities also offer varying ceiling heights, so two units with the same footprint can hold noticeably different volumes if stacking is possible.
Where This Calculation Matters
- Bridging a move-out and move-in gap — sizing temporary storage correctly when the old and new home dates don't line up.
- Downsizing decisions — estimating storage needs when moving to a smaller home and keeping the overflow in storage.
- Comparing facility pricing — unit size drives monthly rate directly, so an accurate size estimate avoids overpaying for unused space.
How to Use This Calculator
- Select the option closest to your household size, from a few items up to a 5+ bedroom house.
- Select Calculate to get the recommended unit dimensions and approximate square footage.
Related Calculations
If everything is going straight into the new home instead of storage, check the Moving Truck Size Calculator for the equivalent sizing guide.