Amazon FBA Storage Volume Calculator
Why 10% off each dimension is not 10% off volume.
Amazon revises fee schedules at least annually and adds new surcharges more often. These defaults are a starting point — the figures in your own fee preview are the ones that describe your ASINs.
Total volume
125.0 ft³
$98 a month at $0.78 per ft³
Volume is the product of three dimensions, so a 10% reduction on each cuts it by 27.1%, not 10%. That compounding is why packaging redesign pays back faster on storage than almost any other cost line.
How the Amazon FBA Storage Volume Calculator works
Volume is the product of three dimensions, so a 10% reduction on each cuts it by more than a quarter. That compounding is why packaging redesign pays back faster on storage than almost any other cost line — and why flat packaging beats light packaging.
Not financial advice. Marketplace fees change, and they vary by country, plan and seller status. Every rate here is an editable default, not a quoted price — check the platform's current fee schedule before you price a product against it. This is not tax or business advice.
Frequently asked questions
How do I calculate cubic feet?
Length times width times height in inches, divided by 1,728. Use the packaged dimensions as Amazon measures them, not the bare product.
How much does packaging reduction save?
More than intuition suggests. Cutting each dimension by a tenth removes roughly 27% of the volume, and it may also drop the product into a cheaper size tier, which affects fulfilment fees too.
Which dimension matters most?
The one that is largest relative to the product inside it, usually height from unnecessary void. But size tiers also have specific thresholds, so getting under one is often worth more than a general reduction.
Does Amazon use my stated dimensions?
No — fulfilment centres measure received units and bill on their own measurement. Test with a real shipment before assuming a packaging change achieved what you designed it to.