Find the right storage unit size
Add the furniture and boxes you plan to store and get the unit size that actually fits — with the fill rate, an aisle allowance if you need one, and what it will cost. Takes about two minutes and needs no sign-up.
Free · No account · Published methodology · Capacity model v1.0
What are you storing?
Each option loads a complete inventory into the calculator, which you can then edit.
Storage unit sizes
- 5×5 A small walk-in closet. Fits part of one room, or about 56 medium boxes. Explore 5×5 →
- 5×10 A large walk-in closet or a garden shed. Fits studio apartment, or about 113 medium boxes. Explore 5×10 →
- 10×10 Half a standard one-car garage. Fits 1–2 bedroom apartment, or about 226 medium boxes. Explore 10×10 →
- 10×15 A large one-car garage. Fits 2 bedroom home, or about 340 medium boxes. Explore 10×15 →
- 10×20 A standard one-car garage. Fits 3 bedroom house, or about 453 medium boxes. Explore 10×20 →
- 10×30 A two-car garage. Fits 4–5 bedroom house, or about 680 medium boxes. Explore 10×30 →
Plan it visually
- Space visualizer Place your sofa, bed and boxes into a unit drawn to scale and see the floor plan. Open the visualizer →
- Size comparison tool Two units side by side with the volume, capacity and cost difference. Compare sizes →
- Furniture volume calculator Cubic feet from a catalog or from your own measurements in inches. Measure your things →
- Moving box calculator How many boxes of each size, plus tape, paper and wrap. Count your boxes →
What storage costs
| Unit size | Standard | Climate-controlled | Typically holds |
|---|---|---|---|
| 5×5 | $40–$75 | $55–$95 | Part of one room |
| 5×10 | $55–$110 | $70–$140 | Studio apartment |
| 10×10 | $90–$180 | $115–$230 | 1–2 bedroom apartment |
| 10×15 | $125–$240 | $155–$300 | 2 bedroom home |
| 10×20 | $160–$310 | $195–$380 | 3 bedroom house |
| 10×30 | $225–$440 | $270–$530 | 4–5 bedroom house |
Reference ranges before promotions, taxes and fees, reviewed August 2026. Metro markets run well above these and rural markets below. Estimate your own total.
How our estimates work
Every capacity figure on this site comes from one model, published in full. A unit's gross volume is its floor area multiplied by an assumed 8 ft ceiling. Usable volume applies a packing-efficiency factor — 85% at moderate density — and subtracts a further 15% when you need an access aisle. Item volumes are packed cubic feet, the basis professional movers use on a cube sheet.
Cost figures are national reference ranges aggregated from published list prices, not quotes, and are dated on every page. We do not publish ZIP-code prices, because a precise number that is stale is worse than an honest range.
Common questions
What size storage unit do I need?
It depends on the volume of your belongings, not on your floor plan. As anchors: a studio apartment is about 278 cubic feet and fits a 5x10; a two-bedroom apartment is about 630 cu ft and fits a 10x10; a three-bedroom house is about 1,168 cu ft and needs a 10x15 or 10x20. The size calculator works it out from your own item list.
How much does a storage unit cost?
Between about $40 and $440 per month in the US depending on size, with a 10x10 — the most common size — running $90–$180. Climate control adds 20–40%. Full cost breakdown.
What is the most common storage unit size?
The 10x10, at 100 square feet. It holds a one to two-bedroom home, which covers the most common reasons people rent storage — a move, a renovation or a downsize. 10x10 size guide.
How tall is a storage unit?
Eight feet in most US facilities. Some newer buildings have 10 ft ceilings, which adds roughly 25% more usable volume for the same floor area.