Storage Unit Size Calculator
Choosing the wrong size storage unit costs you money every month: too small and your belongings will not fit, too large and you pay for unused space. This calculator helps you find the right unit by estimating the total cubic footage of the items you plan to store. Check off each large furniture item and appliance, enter quantities for your boxes, and the calculator totals the estimated cubic footage of your belongings, adds a 30% buffer for aisles and packing inefficiency, and recommends the smallest standard unit size that fits everything. Unit sizes range from a 5x5 (25 sq ft, ideal for a few boxes) up to a 10x30 (300 sq ft, suitable for a large four-bedroom home). The volume estimates for each item are typical industry planning figures; actual dimensions vary by manufacturer and style. If you have unusually large or unusually small pieces, adjust your expectations accordingly. Once you have a recommended unit size, contact several local storage facilities to compare prices. Climate-controlled units cost more but protect wood, electronics, and other sensitive items from temperature and humidity damage.
Estimated volume: -- cu ft | Recommended unit: --
Check off your items above to get a recommendation.
Storage unit size guide
| Unit size | Sq ft | Typical use |
|---|---|---|
| 5x5 | 25 | Small closet items, seasonal decorations, a few boxes |
| 5x10 | 50 | Studio apartment essentials, small furniture, 20-30 boxes |
| 10x10 | 100 | 1-bedroom apartment, sofa, bed, appliances, boxes |
| 10x15 | 150 | 2-bedroom apartment or small house contents |
| 10x20 | 200 | 3-bedroom home, vehicles, large furniture |
| 10x30 | 300 | Large 4+ bedroom home, commercial use, vehicles |
Tips for using a storage unit efficiently
Label every box on all four sides and the top so you can identify contents without opening boxes. Store frequently accessed items near the front and rarely needed items at the back. Use vertical space by stacking boxes on top of furniture and reaching the ceiling with stable stacks. Place mattresses and sofas on end to save floor space. Wrap fragile items individually and use clothing or linens as padding rather than buying additional bubble wrap.
Storage unit size calculator: frequently asked questions
What size storage unit do I need for a 1-bedroom apartment?
A one-bedroom apartment typically requires a 10x10 (100 sq ft) storage unit, which holds roughly 150 to 250 cubic feet of belongings including a bed, dresser, sofa, boxes, and smaller items. If you have a lot of furniture or many large boxes, a 10x15 unit gives more breathing room. Use this calculator to check off your specific items and get a tailored recommendation.
What fits in a 10x10 storage unit?
A 10x10 storage unit (100 square feet, about the size of a small bedroom) can typically hold the contents of a one-bedroom apartment: a queen or full bed, a small sofa, a dresser, a dining set, boxes, and miscellaneous items. With careful stacking and organisation you can fit 200 to 300 cubic feet of belongings. Avoid blocking the aisle from front to back so you can access items in the back.
What is the average cost of a storage unit?
Storage unit prices vary by location, size, and whether the unit is climate-controlled. As a rough national average in the United States: a 5x5 unit runs $40 to $70 per month, a 5x10 runs $60 to $100 per month, a 10x10 runs $90 to $160 per month, and a 10x20 runs $150 to $250 per month. Urban areas and climate-controlled units cost more. Always compare local prices as they vary enormously by market.
How do I pack a storage unit efficiently?
Place heavy, rarely needed items at the back and bottom. Stack boxes with heavier boxes on the bottom and lighter ones on top. Leave a central aisle so you can reach items at the back without unpacking everything. Disassemble furniture where possible to save space. Label all boxes on the side facing the aisle. Use vertical space by stacking to the ceiling, and place frequently accessed items near the front.
Do I need climate-controlled storage?
Climate-controlled storage (typically maintaining 55 to 80 degrees Fahrenheit) is recommended for wood furniture, electronics, artwork, musical instruments, wine, clothing, documents, and anything sensitive to temperature or humidity swings. Standard storage units are fine for metal tools, plastic items, garden equipment, and other items not sensitive to temperature. Climate-controlled units typically cost 25% to 50% more than standard units.
References
- Self Storage Association, "Self Storage Industry Fact Sheet," selfstorage.org
Reviewed by the CalculatorHub team, edited by James Graham, 14 June 2026. Volume estimates are typical planning figures; actual item sizes vary. Always measure large items before booking a unit. See our methodology.