XBKit·Amazon

FBA Size Tier & Fee Estimator

Enter your packaged dimensions to find your Amazon FBA size tier and estimate your 2024 fulfillment fee.

Product Dimensions
oz
in
in
in

How to Measure

Use the packaged weight (incl. packaging), not bare product

Sort dimensions: L = longest side, M = median, S = shortest

Fees are 2024 estimates — verify in Seller Central

Formula
Billing Weight=max(unit weight, dim. weight)
  • Dim. weight (lbs) = L×W×H ÷ 139
  • Small std (≤ 15"×12"×0.75", ≤ 16 oz)$3.06 – $3.33
  • Large std (≤ 18"×14"×8", ≤ 20 lbs)$3.68 – $6.34+
  • Small oversize (≤ 60", girth ≤ 130")$9.61+

How to Use

  1. 1

    Enter product dimensions

    Input the length, width, and height of your packaged product in inches. Use the dimensions as shipped to FBA — including poly bag or box.

  2. 2

    Enter product weight

    Enter the unit weight in pounds. Amazon uses the greater of actual weight or dimensional weight.

  3. 3

    View your size tier

    See your FBA size tier (Small Standard, Large Standard, Large Bulky, etc.) based on Amazon's published thresholds.

  4. 4

    Check your fulfillment fee

    Use the estimated per-unit fee in your profit calculator to determine a viable minimum selling price.

Frequently Asked Questions

What are Amazon's FBA size tiers?

Size tiers: Small Standard (≤15×12×0.75 in, ≤1 lb), Large Standard (≤18×14×8 in, ≤20 lb), Large Bulky (≤59×33×33 in, ≤150 lb), and Extra-Large above that. Each tier has a different fulfillment fee.

How does Amazon calculate dimensional weight?

Dimensional weight = (L × W × H) ÷ 139. If dimensional weight exceeds actual weight, Amazon charges based on the higher value. This often applies to lightweight but bulky products.

When do FBA fees change?

Amazon typically updates FBA fees once or twice per year, usually in January and sometimes mid-year. Always verify the current fee schedule in Seller Central before finalizing pricing.

Are there other FBA fees beyond the fulfillment fee?

Yes. You also pay a referral fee (8–15% of selling price), monthly storage fees (per cubic foot), and potentially aged inventory surcharges for items stored over 181 days.

Related Tools

FBA Profit CalculatorCBM CalculatorLanded Cost Calculator