5×10 storage unit vs 10×10 storage unit
A 5×10 storage unit gives 50 square feet (sq ft) and about 400 cubic feet (cu ft); a 10×10 storage unit gives 100 sq ft and 800 cu ft. Choose the 5×10 storage unit if your inventory is under 289 cu ft and you will not need access; choose the 10×10 storage unit above that, or if you want an aisle.
- +400 cu ft
- +$35–$70 / month
- $0.13 per cu ft
The difference at a glance
| Criterion | 5×10 storage unit | 10×10 storage unit |
|---|---|---|
| Dimensions | 5 ft × 10 ft | 10 ft × 10 ft |
| Floor area | 50 sq ft | 100 sq ft |
| Approximate volume | 400 cu ft | 800 cu ft |
| Usable volume | 340 cu ft | 680 cu ft |
| Medium boxes, alone | 113 | 226 |
| Typical home size | Studio apartment | 1–2 bedroom apartment |
| Vehicle storage | A motorcycle, with room left for boxes | A small car in some drive-up units, though it leaves little else |
| Standard monthly cost | $55–$110 | $90–$180 |
| Climate-controlled cost | $70–$140 | $115–$230 |
| Best for | A studio apartment in storage, a student between semesters, or one room of a house during a renovation. | The default full-apartment unit, and the most rented size in the US. Also the standard choice during a house renovation. |
Volumes assume an 8 ft ceiling and moderate packing density. Cost ranges are national references reviewed August 2026, not quotes.
What the extra space actually buys
Stepping from a 5×10 storage unit to a 10×10 storage unit adds 400 cubic feet of raw volume and 340 cubic feet of usable space. In physical terms that is roughly:
- 6 more queen bed sets, or
- 113 more medium boxes, or
- 7 more three-cushion sofas
The cost of that space is about $0.13 per cubic foot per month at the midpoint of the range — $35 to $70 more each month. Storage pricing is not linear, which is why sizing up is usually cheaper than people expect and renting two small units is usually dearer.
The practical threshold: a 10×10 storage unit brings 1 bedroom apartment and 2 bedroom apartment into range, which a 5×10 storage unit cannot hold.
When to choose the 5×10 storage unit
- Your inventory comes in under 306 cu ft — that is the 90% line where a unit stops being comfortable.
- You will load it once and not return until you empty it.
- You are storing for three months or less, where the monthly saving still matters.
- A studio apartment in storage, a student between semesters, or one room of a house during a renovation.
When to choose the 10×10 storage unit
- Your inventory is above 306 cu ft, or you are not sure — uncertainty is itself an argument for the larger unit.
- You need an access aisle. A 15% aisle drops a 5×10 storage unit to 289 cu ft, which is often the whole reason people outgrow it.
- You are storing for a year or more, where one repack costs more than the price difference.
- The default full-apartment unit, and the most rented size in the US. Also the standard choice during a house renovation.
The honest trade-off
The mistake is treating this as a price comparison. Over twelve months the difference is $420 to $840. The cost of getting it wrong in the other direction is a second rental, a second move of everything you already carried once, and in the worst case a booking on a Saturday when the facility has nothing left in your size.
Against that, the argument for the smaller unit is real and often ignored: a unit you fill completely is cheaper per cubic foot, and an over-sized unit tends to fill with things you would otherwise have thrown away.
The deciding number is your own volume. The 5 ft width is the constraint, not the 400 cubic feet. Measure your longest piece before you book — sofas over 6 ft and king mattresses are the usual casualties.
If you want to see the two loads rather than reason about them, worked inventories for a 5×10 and the full item list for a 10×10 list worked inventories for each. The how to choose a storage unit size covers the method behind the 90% line used above, and what each size costs per month shows where both sizes sit on the price curve.
Work out your own number
Related questions
Is a 10×10 storage unit worth the extra cost over a 5×10 storage unit?
It is if your inventory is above 306 cu ft, or if you need to walk into the unit. The extra 400 cu ft costs about $35–$70 more per month, which works out at roughly $0.13 per cubic foot.
How much bigger is a 10×10 storage unit than a 5×10 storage unit?
100% more volume: 800 cu ft against 400 cu ft, and 100 sq ft of floor against 50 sq ft.
Should I rent two 5×10 storage units instead of one 10×10 storage unit?
Rarely. Two 5×10 storage units cost $110–$220 against $90–$180 for the single larger unit, and you get two doors, two locks and two trips. The exception is when you need frequent access to one half and not the other.
Can I downsize from a 10×10 storage unit to a 5×10 storage unit later?
Yes — month-to-month leases are standard, and facilities will usually move you internally. Budget half a day for the transfer, and be realistic about whether you will actually purge 340 cu ft of belongings to make it fit.