Amazon FBA Storage Fee Calculator (2026)
Enter your item's length, width, height, and unit count to estimate monthly FBA storage cost — standard season vs Q4 peak season.
By Marginory teamContent reviewed
Enter your actual storage quote. Defaults are illustrative and are not verified current rates. Use the schedule for your product size, season and inventory program. Aged-inventory, utilization and other surcharges are excluded from this simple volume model.
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Storage cost estimate
Cubic feet per unit0.250
Total cubic feet stored25.00
Rate (standard)$0.78/cu ft
Estimated monthly storage fee$19.50
Cost per unit / month$0.20
How this is calculated
Cubic feet per unit = (Length × Width × Height in inches) ÷ 1728
Monthly storage fee = Total cubic feet × Rate per cubic foot
Assumptions
- Standard-size rate used for both periods — oversize inventory has a separate (also unverified) rate
- Editable rate estimate; use your current storage schedule and account quote
Source: sell.amazon.com/pricing
Review the market, fee bases and exclusions shown with this tool. Published rates and illustrative cost inputs have different certainty. Compare your breakdown with an actual order statement. Sources and methodology.
Frequently Asked Questions
Is this calculator's storage rate the real Amazon rate?
The tool estimates storage from entered dimensions, units and editable rates. Default rates are illustrative. Use your current rate schedule and account details; this does not model all size/program or inventory surcharges.
Why is the Q4 rate so much higher than standard?
Amazon has historically charged a significantly higher storage rate during October–December (Q4 peak season) to account for the surge in holiday inventory competing for warehouse space. This calculator models that gap, but exact multiples change year to year — verify current Q4 rates in Seller Central before planning holiday inventory levels.
How do I find my item's cubic feet?
Measure the outer dimensions of the box or poly bag your item ships in (not the product itself) in inches, then multiply length × width × height and divide by 1,728 (cubic inches per cubic foot). This calculator does that math for you from the three dimension fields.
Does this include long-term storage fees?
No — this estimates only the standard monthly storage fee. Amazon also charges separate long-term storage fees on inventory that has sat in a fulfillment center for 271+ days, which are not modeled here; consult the current aged-inventory schedule.
Does oversize inventory use a different rate?
Yes, in Amazon's real fee structure — oversize (non-standard-size) inventory has its own storage rate, typically different from standard-size. This calculator uses the standard-size estimate for both periods; if your product is oversize, treat the result as a rough floor rather than an exact figure.