Moving Box Calculator

How this is calculated

⚠️ BE SUSPICIOUS OF ANY SINGLE BOX-COUNT NUMBER, INCLUDING THIS ONE. Reputable moving companies publish wildly different estimates for the same home: for a two-bedroom you will find 20-40, 40-60 and 50-80 boxes quoted with equal confidence. That spread is not sloppiness, it is honest - the number depends almost entirely on how much you own, which no calculator can see. This tool gives a RANGE built up room by room, and you should treat the top of it as the planning figure. THE COUNT IS BUILT FROM ROOMS, not from square footage: about 6-10 boxes per bedroom, 5-9 per other living room, and 8-15 for a kitchen, scaled by how much you own. Square footage is a poor predictor because a large sparse house and a small crowded one pack very differently. ⚠️ THE PART THAT IS NOT A GUESS: DENSITY DECIDES THE BOX SIZE. A box has a volume, its contents have a density, and the product is a weight you have to carry down a flight of stairs. Books and paper run about 25 pounds per cubic foot, mixed household goods about 12, and bedding and clothes about 6. SO THE BIGGEST BOX YOU SHOULD FILL IS SIMPLY YOUR WEIGHT LIMIT DIVIDED BY THE DENSITY. At the standard 50 pound limit, books give 50 / 25 = 2 cubic feet. A small book box is 1.5 cubic feet, so it works. A MEDIUM box is 3 cubic feet, so it is ALREADY TOO BIG for books - and a large one at 4.5 cubic feet would come to 113 pounds. That is the whole reason small boxes exist, and it is why a box of books packed in a large carton either cannot be lifted or fails at the seams while it is being lifted. RUN IT THE OTHER WAY FOR LIGHT THINGS. Bedding at 6 pounds per cubic foot means you could fill an 8 cubic foot box before hitting the limit, which is larger than any box sold - so for duvets and pillows, always use the largest box you can find. Packing linens into small boxes is the same mistake in reverse: it costs you boxes, trips and space in the van. THE 50 POUND LIMIT is a widely used guideline rather than a law of physics, and it is about the person carrying it and the box's own seams, not about the tape. Lower it if the move involves stairs, if you are doing it yourself, or if anyone helping is not used to lifting. BOOKS GET THEIR OWN CALCULATION because they are the thing that breaks moves. A linear foot of shelved books is about 0.56 cubic feet - roughly 10 inches tall by 8 inches deep - so a 1.5 cubic foot box takes a little under three feet of shelf. Twenty feet of books is eight boxes and about 278 pounds, which is worth knowing before you promise a friend it will be a quick job. BUY TOWARDS THE TOP OF THE RANGE. Flat boxes take almost no space, most suppliers take unused ones back, and running out of boxes at 11pm the night before is a genuinely bad position. Running out of TAPE is worse and happens more often.

Common questions

How many boxes do I need to move?

For an average two-bedroom home with three other living rooms and a kitchen, this works out at 35 to 62 boxes - and you should plan for the top of that. The honest answer is that the range is wide because it depends on how much you own. Reputable moving companies publish 20-40, 40-60 and 50-80 boxes for the same two-bedroom home, all with equal confidence. Anyone quoting you a single precise number for a house they have not seen is guessing.

Why do published estimates disagree so much?

Because the thing being estimated is not the house, it is the contents, and two identical houses can differ by a factor of three in what is inside them. Square footage is a particularly poor predictor - a large sparse house packs into far fewer boxes than a small crowded one. That is why this calculator builds up room by room and applies a multiplier for how much you own, and why it reports a range rather than pretending to a precision it cannot have.

What size box should I use?

Divide your weight limit by the density of what you are packing - that is the largest box volume you can safely fill. At the standard 50 lb limit, books at 25 lb per cubic foot give you 2 cubic feet. A small book box is 1.5 cu ft, so it works; a medium at 3.0 cu ft is already too big, and a large at 4.5 would come to 113 lb. This is not a rule of thumb, it is just arithmetic, and it is the whole reason small boxes exist.

Why is my box of books so heavy?

Because books are about 25 pounds per cubic foot, which is denser than almost anything else you own. A completely full large box of books is around 113 lb - not liftable, and heavy enough that the box itself will fail at the seams while you try. Twenty linear feet of shelved books is roughly 8 small boxes and about 278 lb in total. Books are the single commonest reason a move goes wrong, and it is always the same mistake: packing them by volume in whatever box was nearest.

Can I put bedding in small boxes?

You can, but it is the same mistake in reverse and it costs you. Bedding is about 6 lb per cubic foot, so you could fill an 8 cubic foot box before reaching a 50 lb limit - larger than any box sold. Duvets, pillows and coats should always go in the largest boxes you can get. Packing light bulky things into small boxes wastes boxes, wastes trips up the stairs, and wastes space in the van, because a van fills up by volume rather than by weight.

Is 50 lb a real limit?

It is a widely used guideline rather than a law, and it is about two things: the person carrying the box, and the box's own seams and handles. Neither cares what the tape can do. Lower it if the move involves stairs, if you are doing the carrying yourself rather than paying movers, or if the people helping are not used to lifting. There is nothing clever about a 60 lb box that gets dropped on the landing.

How do I measure my books?

Measure the SHELVES, not the books. Add up the linear feet of shelf that has books on it - a standard 6 ft bookcase with 5 shelves is 30 linear feet if it is full. A linear foot of shelved books is about 0.56 cubic feet, being roughly 10 inches tall and 8 inches deep, so a 1.5 cubic foot box takes a little under three feet of shelf. That is far quicker than counting books and considerably more accurate than guessing.

Should I buy extra?

Yes, and towards the top of the range rather than the middle. Flat boxes take up almost no room, most suppliers will take unused ones back, and used ones sell or give away easily afterwards. Running out of boxes at eleven at night before a morning van is a genuinely bad position to be in. The thing people run out of even more often is TAPE - buy more rolls than seems sensible, because a roll does far fewer boxes than you would expect once you are taping the bottom properly as well as the top.

Take it further with AI

Copy this into ChatGPT or Claude with your own numbers filled in. It hands over the figures this calculator worked out, so the answer is built on real arithmetic instead of a guess.

I used the Moving Box Calculator at https://www.bfcbrilliance.com/tools/moving-box-calculator.

What I entered:
- Bedrooms: ___
- Other living rooms: ___
- Kitchens: ___
- How much you own: ___
- Books (linear ft): ___
- What you are packing: ___
- Most a box should weigh (lb): ___

What it calculated:
- Boxes to get: ___
- You might get away with: ___
- Biggest box you should FILL: ___
- A SMALL box of it, full: ___
- A MEDIUM box of it, full: ___

Use those figures as given — they are already worked out, so please don't recalculate or estimate your own. Help me turn them into a plan: what to buy or do, in what order, roughly what it should cost, and the mistakes people most often make with this job.

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