Will It Fit? Box Calculator

Check whether an item fits inside a box before you pack.

Will it fit? Know before you tape the box shut. Enter your item and your carton, then see instantly whether it slides in — checked in all six rotations, with room to spare.

Perfect for posting parcels, packing a move, or organising storage without the trial-and-error.

WHAT YOU GET • Instant fit check — item, box and padding, tested in six orientations • Live 3D diagram, so the fit is obvious at a glance • Clearance and fill readout on every check • Saved box and item presets — reuse your favourite mailers and moving cartons with one tap • Reference library — standard carton sizes, carrier limits and packing tips • Full history of every fit you have checked • Inches or centimetres, works 100% offline

HOW IT WORKS

1. Type your item's length, width and height
2. Enter the box's inside size and choose padding
3. Get an instant verdict plus the best orientation

FULL ACCESS Unlock all six orientations, saved presets, full history and the reference library with a weekly or yearly plan, or a one-time lifetime purchase.

PRIVACY Everything stays on your device. No account, no ads, no tracking.

Pack it right the first time and skip the costly do-overs.

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