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Storage Unit Dimensions and Floor Area Chart

Compare nominal storage dimensions and floor areas, then subtract real access space and test your furniture layout before renting.

MoveDayPlan Editorial Updated

Compare nominal storage dimensions and floor areas, then subtract real access space and test your furniture layout before renting.

Dimensions describe a footprint

Storage providers commonly describe units by nominal width and depth. Actual dimensions, doors and usable height vary. The table calculates floor area only; it does not assign a guaranteed number of bedrooms or permit stacking to a particular height.

Nominal unit — planning worksheet
Nominal unitGross floor areaExample 2 ft × 5 ft aisleArea left after that aisle
5 × 5 ft 25 sq ft 10 sq ft 15 sq ft
5 × 10 ft 50 sq ft 10 sq ft 40 sq ft
10 × 10 ft 100 sq ft 10 sq ft 90 sq ft
10 × 15 ft 150 sq ft 10 sq ft 140 sq ft
10 × 20 ft 200 sq ft 10 sq ft 190 sq ft
10 × 30 ft 300 sq ft 10 sq ft 290 sq ft

Draw the aisle you actually need

The 10 sq ft aisle is an arithmetic illustration, not an accessibility standard or a recommendation for every unit. A longer route to rear shelves uses more area. Include columns, door swing, appliance access and no-stack items in the sketch. Two 50 sq ft spaces are not necessarily interchangeable with one 100 sq ft space for a long piece of furniture.

For a first screen, 350 cu ft divided by a chosen 5 ft stacking height is 70 sq ft. Adding a 2 × 10 ft aisle and 5 sq ft reserved space gives 95 sq ft. A nominal 10 × 10 candidate still needs a physical layout and door check. Choose stacking heights based on the actual items, packaging and provider instructions.

Reviewed October 22, 2026. This worksheet uses editorial examples; measurements, prices, dates and provider requirements must be confirmed for your own move.

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