Moving Calculators
Storage Unit Size Calculator
Not sure whether you need a 5×5, 5×10, 10×10, 10×15 or 10×20 storage unit? Enter your items and this calculator recommends the smallest unit that fits, with a volume breakdown in ft³ and m³.
Last updated: June 2026
Formula Used
Each furniture item has an approximate volume. The calculator sums total volume, adds 25% packing inefficiency, then matches the smallest standard unit that fits.
Recommended unit = smallest unit where unit_volume ≥ required
Example Calculation
1-bedroom apartment: Queen bed 50 ft³ + couch 60 ft³ + dresser 20 ft³ + 20 medium boxes 60 ft³ = 190 ft³ × 1.25 = 237 ft³ needed → 10×10 unit (800 ft³) recommended.
How to Use This Calculator
- Enter quantities for each furniture type.
- Add your estimated box count by size.
- Toggle US or Metric units.
- Read the recommended unit size and total volume estimate.
Standard Storage Unit Size Guide
| Unit size | Sq ft | Volume (8ft ceiling) | Fits approximately |
|---|---|---|---|
| 5×5 | 25 | 200 ft³ | Small bedroom, seasonal items |
| 5×10 | 50 | 400 ft³ | Studio apartment, small 1-bed |
| 10×10 | 100 | 800 ft³ | 1-bedroom apartment |
| 10×15 | 150 | 1,200 ft³ | 2-bedroom apartment, small house |
| 10×20 | 200 | 1,600 ft³ | 3-bedroom house, large apartment |
| 10×30 | 300 | 2,400 ft³ | 4-bedroom house, vehicle storage |
Notes & Limitations
Volume estimates are averages. Measure unusually large items manually. Climate-controlled units are recommended for electronics, artwork, and wooden furniture. Related: Moving Box Calculator · Moving Truck Size Calculator.
Frequently Asked Questions
What size storage unit do I need for a 1-bedroom apartment?
A 10×10 storage unit (100 sq ft, ~800 ft³) typically fits the contents of a 1-bedroom apartment including bed frame, mattress, dresser, small couch, dining table and chairs, plus 20–30 boxes.
What is the most popular storage unit size?
The 10×10 is the most rented self-storage unit size in the US. It offers a good balance of space and cost, fitting most 1-bedroom apartment contents. For larger households, the 10×20 is next.
How much does a storage unit cost per month?
US national averages (2025): 5×5 = $50–80/mo, 5×10 = $70–120/mo, 10×10 = $100–180/mo, 10×20 = $160–280/mo. Indoor climate-controlled units cost 20–50% more.
Should I get a climate-controlled storage unit?
Yes, for electronics, photos, artwork, musical instruments, or wooden furniture in areas with extreme temperatures or humidity. Climate-controlled units maintain 55–85°F year-round.
How do I maximize space in a storage unit?
Disassemble furniture where possible. Use uniform-sized boxes. Place heavy items on the bottom. Leave a center aisle for access. Use shelving units for vertical space. Label all boxes on multiple sides.
Can I store a car or motorcycle in a self-storage unit?
Yes — a 10×20 unit fits most standard vehicles. Partially drain fluids and disconnect the battery for long-term storage. Some facilities require proof of insurance and registration.