What is Amazon Storage Fee?
Amazon charges storage fees for inventory stored in their fulfillment centers as part of the FBA (Fulfilled by Amazon) program. The fee is based on the physical space your products occupy inside the warehouse, measured in cubic feet. It is not based on the weight or the number of units alone — the volume of each product is what determines your storage cost. This means sellers with large, bulky products pay significantly more in storage fees compared to sellers with compact, lightweight items of the same value.
How Amazon Storage Fees Are Calculated
Amazon storage fees depend on three key factors: the physical dimensions of your product (Length, Width, Height), the total number of units stored in the fulfillment center, and the duration of storage. Amazon measures your product's volume in cubic feet and charges a monthly fee per cubic foot based on the current rate schedule. Fees are assessed monthly and are based on the daily average volume of inventory stored during each calendar month. Products that occupy more cubic footage cost proportionally more to store.
Amazon Storage Fee Formula
Volume per unit = Length (ft) × Width (ft) × Height (ft)
Total volume = Unit volume × Number of units stored
Storage fee = Total cubic feet × Monthly rate per cubic foot
To convert cm to feet: divide by 30.48. To convert inches to feet: divide by 12.
Why Sellers Should Calculate Storage Fees
Storage fees are one of the most overlooked costs in FBA selling. Many Amazon sellers focus heavily on referral fees and fulfillment fees but underestimate how much storage costs can accumulate — especially during slow sales periods or when inventory turnover is low. For products with tight margins, even a few months of slow movement can turn a profitable product into a loss-making SKU when storage fees are properly accounted for.
Accurate storage fee calculation is essential for inventory planning, pricing decisions, and profitability modeling. Sellers who understand their true storage cost per unit can make smarter decisions about how much inventory to send to FBA warehouses, when to run promotions to clear stock, and which products are worth continuing to sell. Our Amazon Storage Fee Calculator India makes it simple to model these costs before you commit inventory to the warehouse.