How many boxes fit in a storage unit?

Renting too much unit is the classic moving mistake. Enter your box size, pick the unit, and see how many boxes it really swallows.

Enter your setup

Your box

Box length

Box width

Box height

Storage unit

Unit sizeInterior L×W×H. Assumes ~75% stacking efficiency.

Use positive measurements and valid numbers.

MOVING · STORAGE

Boxes that fit

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Do you need storage gear?

Moving box multi-packsAmazon Freestanding shelvingAmazon

Hand-picked for this exact result — no generic lists.

75% efficiency accounts for the door swing, uneven stacks and the walkway you'll want.

Leave a walkway.
You'll need to reach the back. A 60 cm aisle costs little space.
Heavy at the bottom.
Books and tools low; pillows and linens high.
Fill the height.
Units are 2.4 m tall — most people waste the top metre.
Label three sides.
You'll thank yourself in six months.

One concrete case, with the assumptions spelled out.

A 10,800 L unit at 75% efficiency holds about 225 boxes of 36 L each.

ƒ(x)boxes = floor(unit litres × 0.75 ÷ box litres)