Amazon FBA Storage Fee Calculator 2026

Calculate your Amazon FBA storage fees accurately for 2026. Our free tool helps you estimate monthly storage fees, long-term storage fees, and total storage costs for your FBA inventory.

How FBA Storage Fees Are Calculated

Amazon FBA storage fees are calculated based on the volume of space your inventory occupies in Amazon's fulfillment centers. The formula is straightforward:

Storage Fee = (Length × Width × Height / 1728) × Quantity × Rate × Months

Where:

• Cubic Feet = (Length × Width × Height) / 1728 - converts cubic inches to cubic feet
• Rate = $3.00/cu ft (Jan-Sep) or $4.00/cu ft (Oct-Dec holiday season)
• Long-Term Fee = $6.90/cu ft for items stored > 365 days

Real Example: Storage Fees for 100 Units

Let's calculate storage fees for 100 Large Standard items (18"×14"×8") over 3 months:

• Dimensions: 18" × 14" × 8"
• Quantity: 100 units
• Storage Duration: 3 months
• Rate: $3.00/cu ft (non-holiday season)

Step 1: Calculate cubic feet per unit = (18 × 14 × 8) / 1728 = 1.1667 cu ft
Step 2: Total cubic feet = 1.1667 × 100 = 116.67 cu ft
Step 3: Monthly fee = 116.67 × $3.00 = $350.00
Step 4: Total for 3 months = $350.00 × 3 = $1,050.00

If these items were stored during Q4 (Oct-Dec), the monthly rate would be $4.00, totaling $1,400 for 3 months.

Key Factors That Impact Storage Fees

Several variables significantly affect your storage costs:

• Product Dimensions: Larger items occupy more space, increasing fees dramatically.
• Quantity: More units mean more total volume, directly impacting costs.
• Storage Duration: Longer storage periods accumulate higher fees.
• Season: Q4 rates (Oct-Dec) are 33% higher than regular rates.
• Long-Term Storage: Items stored >365 days incur additional quarterly fees of $6.90/cu ft.

What This Calculator Doesn't Include

This tool calculates standard storage fees, but you should also consider:

• Inventory Placement Service Fees: If you use Amazon's placement services
• Removal Order Fees: Fees to remove or dispose of inventory
• Multi-Channel Fulfillment (MCF) Fees: Different from FBA storage
• Currency Conversion Fees: For international sellers

Understanding Amazon FBA Storage Fees

Amazon FBA storage fees are charges for storing your inventory in Amazon's fulfillment centers. These fees are based on the volume of space your products occupy and the time they remain in storage.

1. Monthly Storage Fees

Monthly storage fees are charged based on the cubic feet your inventory occupies in Amazon's warehouses. The rates vary by month (higher during Q4 holiday season) and by storage type (standard vs. oversized).

2. Long-Term Storage Fees

Long-term storage fees apply to items that have been in storage for more than 365 days. These fees are charged quarterly (on the 15th of February, May, August, and November) and are calculated based on the volume of long-term inventory.

Size Tier Dimensions

• Small Standard: Items that weigh 12 oz or less and fit within 18 x 14 x 8 inches
• Large Standard: Items that weigh more than 12 oz but less than 20 lbs, with dimensions under 18 x 14 x 8 inches
• Small Oversize: Items exceeding standard size but weighing less than 70 lbs
• Medium Oversize: Items weighing 70-150 lbs with larger dimensions
• Large Oversize: Items weighing over 150 lbs or with very large dimensions

2026 Storage Fee Rates

Amazon typically updates storage fees annually. For 2026, the following rates apply:

How to Use This Calculator

Our FBA Storage Fee Calculator helps you estimate storage costs for your inventory:

1. Enter the quantity of items in your inventory
2. Select the appropriate size tier for your product
3. Input the weight per unit
4. Enter the number of months you expect to store the items
5. Check the box if items will be stored longer than 365 days
6. Select the storage type (standard or oversized)

FAQ