Self Storage Size Calculator
Not sure what size storage unit you need? Use our free UK self storage size calculator — add your items or pick a home preset and we'll recommend the right unit size, then help you compare prices from facilities near you.
Quick start — home presets
Three steps to the right storage unit size
Choosing the wrong size is the most common mistake when renting self storage. Pay for a unit that's too small and you'll be moving boxes twice — too large and you're paying for empty space every week. Our calculator removes the guesswork in under a minute.
- 1
Pick a preset or add items
Start with a home preset (studio to 4-bed) or build a custom list from over 50 common household and business items.
- 2
Get your sq ft recommendation
We total the footprint of your selected items and apply a 15% packing buffer to recommend a standard UK unit size.
- 3
Compare nearby facilities
Jump straight to verified self storage operators near you and compare prices, opening hours and security features.
UK self storage unit sizes explained
Self storage units in the UK are measured in square feet (sq ft). Below is a guide to the most common sizes, what they realistically fit and indicative weekly prices from operators across the country. Use it alongside the calculator above for a confident decision.
| Size | Name | Roughly the size of | Fits | From |
|---|---|---|---|---|
| 10-15 sq ft | Locker | A small wardrobe | Suitcases, archive boxes, small electronics, seasonal items | 5-£12/week |
| 25 sq ft | Small | A garden shed | Studio flat contents, contents of a small van, decorating projects | 10-£18/week |
| 35-50 sq ft | Medium | A small bedroom | 1-bedroom flat, motorbike, small business stock | 15-£28/week |
| 75 sq ft | Medium+ | An average bedroom | 2-bedroom flat, partial 3-bedroom house | 22-£38/week |
| 100 sq ft | Large | A single garage | Most 2-3 bedroom houses with appliances | 28-£48/week |
| 150 sq ft | Large+ | A large garage | Full 3-bedroom house, business archive | 38-£62/week |
| 200 sq ft | XL | Half a single garage + utility | 4-bedroom house, significant business stock | 48-£78/week |
| 300 sq ft | XXL | A double garage | 5+ bedroom house, vehicle, large business inventory | 65-£110/week |
Prices are indicative national averages from verified UK self storage operators. Actual prices vary by location, demand and length of stay.
Not sure which size you need?
Get a personalised sq ft recommendation in under a minute, then compare prices at nearby self storage facilities.
5 ways to fit more into a smaller storage unit
A smart pack can save you a whole unit size — and £400-£800 a year in storage fees. Use these tips before you book, then re-run the calculator.
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Disassemble large furniture
Bed frames, tables and wardrobes pack flat against the wall, freeing the floor for boxes.
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Store mattresses on edge
A double mattress vertical takes 4 sq ft instead of 28. Use a mattress bag to protect it.
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Stack to the ceiling
Most units are 8 ft tall. Heaviest boxes on the bottom, lightest on top — label every side.
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Fill hollow items
Use drawers, the inside of the washing machine, suitcases and pots to store smaller items.
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Leave a walkway
An 18-inch aisle down the middle means you can reach anything without unloading the whole unit.
Who uses our self storage calculator?
The right unit size depends as much on why you're storing as what you're storing. Here's how thousands of UK customers use the calculator each month.
Moving home
Between sales, downsizing or renovating? Store a full house in a medium-large unit while you find your next place.
Learn moreBusiness storage
E-commerce stock, document archives, equipment between offices — flexible rolling contracts that scale with you.
Learn moreFurniture storage
Protect sofas, beds and wardrobes between moves or while you redecorate. Most need a medium unit.
Learn moreDecluttering
Free up loft, garage or spare-room space without throwing out items you might want back. Lockers from 10 sq ft.
Learn moreSelf storage size calculator FAQs
Answers to the most common questions about choosing a UK storage unit size.
How accurate is this self storage size calculator?
The result is a guide based on industry-standard footprint estimates used across UK self storage operators. We add a 15% buffer for walkways and stacking. Your actual requirement may vary by one unit size either way depending on how efficiently items are packed.
What size storage unit do I need for a 1-bedroom flat?
Most 1-bedroom flats fit comfortably in a 35-50 sq ft unit. That's enough for a double bed, wardrobe, sofa, small dining set, fridge/washer and around 10-15 medium boxes. Use the calculator above to fine tune based on your specific items.
What size storage unit do I need for a 3-bedroom house?
A typical 3-bedroom house contents needs 100-150 sq ft of storage — roughly the footprint of a single garage. This covers main living room furniture, three bedrooms of beds and wardrobes, a dining set, white goods and boxed belongings.
How many sq ft is a standard storage unit in the UK?
UK self storage units typically come in 10, 15, 25, 35, 50, 75, 100, 150, 200 and 300 sq ft sizes. Lockers start as small as 10 sq ft (wardrobe-sized) and units scale up to 500+ sq ft for full house moves or business stock.
What if I'm between two storage unit sizes?
Always round up. The cost difference between sizes is usually small (£5-£15 per week) and it saves the hassle and expense of moving to a bigger unit later. Most UK operators allow you to upsize at any time with no penalty.
Do I need climate-controlled storage?
For electronics, artwork, antiques, photographs, vinyl records, leather furniture or important documents, yes — climate control prevents damp and temperature damage. For general household goods, clothing in vacuum bags and most furniture, a standard unit is perfectly fine.
How long can I rent a self storage unit for?
Most UK self storage runs on rolling weekly or monthly contracts with no minimum term beyond your first period. You can typically stay as long as you need — from one week to several years — and give short notice to leave.
Can I use the calculator for business storage?
Yes. The Business category includes desks, filing cabinets, pallets of stock, archive boxes and display stands. Businesses storing seasonal stock, e-commerce inventory or office furniture between moves should use the calculator the same way.
Is the storage size calculator free to use?
Completely free, no signup required. Find My Storage is an independent UK self storage comparison site — we earn from verified operator listings, not from users.
Still weighing up sizes? Two clicks to a confident decision.
Helpful self storage guides
Once you've sized your unit, dig deeper into UK self storage with our most-read guides — from average prices to city-by-city comparisons.
How to find self storage near you in the UK
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Read guideUK self storage prices 2026
Average weekly costs by city, unit size and operator type.
Read guideStorage Manchester: complete guide
Units, prices and operators across Greater Manchester.
Read guideSelf storage Edinburgh guide
Prices, locations and what to expect across the capital.
Read guideStorage Bristol 2026 guide
For movers, students and businesses across the South West.
Read guideBrowse all UK storage locations
200+ city and town pages with local facility comparisons.
Read guideBrowse popular cities: London, Manchester, Birmingham, Glasgow, Edinburgh, Bristol, Leeds, Liverpool — or see all articles.
Ready to find self storage near you?
Compare verified UK self storage facilities by location, price, size and reviews — all on one independent comparison site.