Amazon FBA Fee Calculator
Estimate Amazon FBA fulfillment fee by size tier and shipping weight, plus storage.
Amazon FBA fee table last updated · reference source
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Currency: Amounts are calculated in the currency you select; this site does not convert between currencies and does not use live exchange rates.
Fee figures are stored in our static fee table and change over time. Confirm current rates against the platform's official fee page before relying on them.
What this tool does
This tool classifies your product into Amazon's US standard or bulky size tiers from its packaged dimensions and weight, determines the shipping weight (the greater of unit weight and dimensional weight using the 139 divisor for large items), and looks up the FBA fulfillment fee from our static rate card. It adds monthly storage based on cubic feet.
How to use the Amazon FBA Fee Calculator
- Measure the packaged item and enter length, width and height in inches.
- Enter the unit weight in pounds.
- Choose the storage season and average months stored.
- Read the size tier, fulfillment fee and total per-unit FBA cost.
Formula
DimWt = L × W × H ÷ 139; ShipWt = max(Unit, DimWt) (large standard+); Fee = RateCard(tier, ShipWt)
- L, W, H
- Package dimensions in inches
- Unit
- Unit weight in lb
- RateCard
- Fee band from the static FBA table
- Storage
- cu ft × monthly rate × months
Worked example
A 10 × 6 × 3 in package weighing 1.2 lb stored one month off-peak.
Inputs
- Package length10 in
- Package width6 in
- Package height3 in
- Unit weight1.2 lb
- Storage seasonJan–Sep ($0.78/cu ft)
- Average months in storage1
Result
- FBA fulfillment fee$5.37
- Size tierLarge standard
- Shipping weight used1.29 lb
- Dimensional weight1.29 lb
- Storage cost per unit$0.08
- Total FBA cost per unit$5.45
FBA large standard rate card (non-peak, excerpt)
| Shipping weight | Fee |
|---|---|
| up to 4 oz | $3.68 |
| up to 8 oz | $3.90 |
| up to 12 oz | $4.15 |
| up to 16 oz | $4.55 |
| up to 20 oz | $4.99 |
| up to 24 oz | $5.37 |
| up to 28 oz | $5.52 |
| up to 32 oz | $5.77 |
| up to 36 oz | $5.87 |
| up to 40 oz | $6.05 |
| up to 44 oz | $6.21 |
| up to 48 oz | $6.62 |
Results explained
- Fulfillment fee
- Pick, pack and ship cost Amazon charges per unit sold.
- Size tier
- Determined by the longest, median and shortest sides and weight.
- Shipping weight
- The weight used to find the fee band.
- Dimensional weight
- Volume ÷ 139.
- Storage cost
- Monthly storage allocated to one unit.
- Total FBA cost
- Fulfillment + storage per unit.
Frequently asked questions
Amazon assigns a size tier from your packaged dimensions, then charges a fee from the rate card based on shipping weight.
Amazon uses 139: length × width × height in inches ÷ 139 gives dimensional weight in pounds.
Packages up to 15 × 12 × 0.75 inches and 1 lb or less.
October to December storage costs about three times more per cubic foot because warehouse demand peaks.
No — use the Amazon Referral Fee Calculator or Amazon Profit Calculator for the full picture.