Estimate how many moving boxes you need by room and household size.
Box counts scale with both the property and the people in it, because rooms determine the fixed contents — kitchen, books, linen — while occupants determine the personal ones. About 20 boxes per bedroom plus 10 per person is the working estimate for an average household, adjusted up sharply for long tenure and full cupboards. The size mix matters as much as the count: roughly 35% small, 40% medium and 25% large, because heavy things belong in small boxes. A large box filled with books becomes unliftable and usually fails at the seam, so the small-box share is not a suggestion. Add two wardrobe boxes per bedroom if you want hanging clothes to arrive on their hangers.
Moving Box Count
Base = bedrooms x 20 + people x 10; total = base x possessions factor; mix = 35% small, 40% medium, 25% large plus 2 wardrobe boxes per bedroom
Around 90 for an average family of three, and closer to 125 if you have lived there a decade without a clear-out. Order 10% more than you think and return the unused flat ones.
Books, tinned food, tools, crockery — anything dense. The rule is one person should be able to carry any packed box comfortably, which caps a small box at about 30 lb.