The estimate allows roughly 20 square feet per room for a furnished home, furniture, boxes, and sensible stacking included, with extra allowance where bulky furniture or archive boxes are part of the load. It produces a range rather than a single figure, because two homes with the same room count rarely store the same way: a minimalist flat and a family home with a full loft differ by a unit size.
As reference points: a studio usually needs 15–35 sq ft, a one-bedroom flat 35–50 sq ft, a two-bedroom home around 75 sq ft, and a larger family house 100–200 sq ft. If your result sits between two unit sizes, choose the larger one when you will need access during the storage period, and the smaller one when everything goes in once and comes out once.
Moving into storage is often one leg of a bigger move. We collect from your property, place the items into the unit you have rented in your own name, and deliver them when the new place is ready, the storage solutions page explains how the stages fit together.