Work out how much storage space you need.
Instead of guessing from room names alone, SpaceSizer lets you select boxes, furniture, appliances and awkward items, then gives you a practical storage recommendation.
Calculate your storage size
Add your belongings, choose how much access you want inside the unit, and SpaceSizer will suggest a practical size band.
Start sizingHow storage sizing works
Storage units are normally sold by floor area. The amount you can actually fit depends on the height of the unit, the shape of your belongings, whether furniture can be dismantled, how safely items can be stacked and whether you want an aisle for access.
Tight fit
Best when you are happy to stack carefully and do not expect to access belongings often.
Recommended fit
A balanced starting point that allows some practical access while still using the space efficiently.
More comfortable
Useful when you want easier access, less stacking or extra flexibility for awkward items.
Common questions
Should I book the smallest size that technically fits?
Not always. A slightly larger unit may make loading, access and future retrieval much easier.
Do boxes make a big difference?
Yes. A large number of boxes can use substantial volume, but they are usually easier to stack efficiently than sofas, bikes or wardrobes.
Can SpaceSizer guarantee a fit?
No. It is an estimate because exact item and unit dimensions vary.