Storage Bin Count Calculator
Find how many storage bins your stuff needs from its volume and the bin size — with a packing-efficiency allowance so bins are not overstuffed.
How it works
Usable per bin = bin capacity·efficiency% · Bins = round up(volume ÷ usable per bin)
A bin never packs to its rated litres — odd shapes, lids that must close, and air gaps mean you fill perhaps 70–80% of the label figure. Multiplying the bin size by a realistic efficiency gives the usable litres, and dividing your total volume by that, rounded up, gives an honest bin count. Guessing from raw capacity is why people always end up one or two bins short.
Worked example
To store 200 L of belongings in 50 L bins packed to 75% efficiency, each bin holds 50·0.75 = 37.5 usable litres. 200 ÷ 37.5 = 5.3, rounded up to 6 bins.
Frequently asked questions
Why not just divide by the bin size?
Because bins never fill completely — lids have to close over uneven contents and there are always gaps. Packing to 70–80% of the rated capacity is realistic, so dividing by the raw label size leaves you short.
How do I estimate my volume in litres?
Multiply the length, width and height of a rough pile or box in centimetres and divide by 1,000, or add up the litres of boxes you already have. A moving-box medium is roughly 60–80 L.
Should heavy items change the count?
Volume drives the count, but very dense items (books, tools) can hit a weight limit before a bin is full, so you may fill fewer litres per bin. Drop the efficiency figure for heavy loads.
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This calculator is for educational purposes. Double-check important results before acting on them.