How many boxes should I buy now, reassess later and keep as reserve?
Do not treat a bedroom preset as an exact answer. Build an editable base from your zones and specialty items, subtract reusable bins, buy a lean first batch, then compare the base and reserve scenarios after real packing.
Method
The base is the sum of editable per-zone assumptions plus heavy-book, fragile and wardrobe boxes, less existing bins. The tool shows 85% first purchase, editable base and your reserve percentage; these are planning assumptions, not an industry standard.
Important limitation
Actual belongings, packing density, box strength, mover rules and local supply prices vary. This page does not quote a move, select a truck, place an order or guarantee that a given item is safe in a box.