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Amazon FBA Calculator US

Fees and profit per unit on Amazon.com, 2026 rate card.

Amazon FBA fee calculator: category-based profit model

The listing

What it sells for, what it costs you to land, and which referral rate Amazon charges.

The packed unit

Measure the box you ship, not the product. These drive the size tier and the dimensional weight.

Your assumptions

The inputs Amazon does not set for you. Each one moves the answer, so none of them defaults to the flattering value.

30 days

Size tier and clearance

How close this unit sits to the ceiling of its tier. Crossing one of these is what moves a fee, and it is the same arithmetic behind a mis-tiered charge.

Large Standard

$6.31 fulfillment

Longest side10.00 / 18.00 in56%
Median side8.00 / 14.00 in57%
Shortest side4.00 / 8.00 in50%
Unit weight1.50 / 20.00 lb8%
Billed weight36.8 / 40.0 oz92%

greater of actual and dimensional weight

Tightest constraint is billed weight, with 3.2 oz before this unit moves into the next weight band.

Size tiers

  • Small Standard
  • Large Standard (current tier)
  • Small Bulky
  • Large Bulky
  • Extra-Large

How this fee was worked out

Dimensional weight
2.30 lb
Weight band
2.25 to 2.5 lb
Price band
$10 to $50
Base fee
$6.10
Fuel & logistics surcharge (3.5%, from 17 Apr 2026)
+$0.21
Not modelled yet (5)
  • Apparel rates (separate ladder from non-apparel)
  • Dangerous goods / hazmat rates
  • Low-Price FBA (separate, cheaper ladder under a price threshold)
  • Ships in Product Packaging (SIPP) discounts
  • Overmax / oversize handling above the Extra-Large ceiling

Net profit per unit

$10.88

PROFITABLE

Healthy margin. Factor in PPC budget before ordering.

Margin
36.3%
ROI
136.0%
Fee take
37.1%
Fee breakdown per unit, from selling price to net profit
Selling price$29.99
− Referral fee (15.0%)−$4.50
− Fulfillment fee−$6.31
− Storage fee (per unit)−$0.30
− Product cost (COGS)−$8.00
= Net profit per unit$10.88

Revenue split (% of selling price)

  • Product cost26.7%
  • Referral fee15.0%
  • FBA fee21.0%
  • Storage1.0%
  • Net profit36.3%

Break-even price

$17.19

Where net profit reaches zero, holding your cost and the current fee bands.

Max product cost

$18.88

The most you can pay per unit at this price before the SKU stops making money.

Fee overcharges start in the same arithmetic as the tiers above: when Amazon's recorded dimensions are larger than the unit actually is, it is billed in a higher tier until the record is corrected.

Get a free audit
Gross revenue
$2,999.00
Total Amazon fees
$1,111.19
Product cost
$800.00
Monthly net profit
$1,087.81

At 100 units a month. These are the per-unit fees this calculator models, multiplied out, rather than a full settlement.

US rate card

What this FBA calculator includes

The figures in this article come from the 2026 US rate table the calculator itself runs on, effective 15 Jan 2026: one source for the page and the tool. Enter a selling price, a landed cost, packed dimensions and weight, and it returns the fulfillment fee, the referral fee, a storage estimate and net profit per unit, in dollars, inches and pounds. Three pieces of 2026 fee mechanics do most of the work, and the calculator applies each one for you.

Working in another market? The same calculator runs on the Amazon UK rate card and on the Amazon India fee stack.

Size tiers and dimensional weight

Small Standard, Large Standard, Small Bulky, Large Bulky and Extra-Large: the tier is detected from your packed dimensions and weight. Dimensional weight is length × width × height ÷ 139, so a roomy box can out-bill a heavy one.

Price bands, applied automatically

Since 15 Jan 2026 the same physical unit carries a different fulfillment fee by what it sells for: Under $10, $10 to $50 and Over $50. The band is read from the price you enter, and an item at exactly $10 takes the $10 to $50 rate.

Fuel surcharge, shown separately

From 17 Apr 2026 a 3.5% fuel and logistics surcharge applies to the fulfillment fee. It is charged on the fee, not on your selling price, and it appears as its own line rather than folded into the total.

The method

How the FBA fulfillment fee is worked out

Three lookups, in this order: size tier, billed weight, price band. The size tier comes first, from your packed dimensions and unit weight, and each tier is a weight ladder rather than one price. Billed weight comes next, as the greater of unit weight and dimensional weight (length × width × height ÷ 139), with two exceptions that bill unit weight alone: Small Standard, and Extra-Large above 150 lb. Your selling price then picks the band, and the fee is read from the cell where the weight ladder and the price band meet.

The boundary

What this calculator does not model

A fee estimate is only as good as its stated edges. The figure above is the non-peak fee for a standard, non-apparel unit, and these charges sit outside it:

  • Amazon's per-tier, per-month storage rates: the storage line here is a single blended estimate
  • Inbound placement service fees
  • The low-inventory-level fee
  • Returns processing fees
  • Aged-inventory surcharges

The calculator also names the programme ladders it defers, apparel and dangerous goods among them, beside its result. Confirm the full stack in Seller Central's fee preview before you commit stock.

Fees you already paid

How FBA reimbursements affect your real profit

The dimensional-weight mechanics above are where fee overcharges start. When Amazon's recorded dimensions for a SKU are larger than the physical unit, the unit bills in a higher size tier than it belongs in, and that difference keeps being charged for as long as the record stays uncorrected. Modelling fees protects margin going forward; most sellers are also losing money backwards, to overcharged fees, lost inventory and return discrepancies. Leviathan Recon, our inventory reconciliation platform, rebuilds your unit ledger per FNSKU from reports you export yourself, and our reimbursement recovery service files claims manually inside Amazon's 60-day window.

Common questions

FBA calculator FAQs

Yes. This page calculates in USD using inches and pounds, on Amazon's rate card effective 15 January 2026. Dimensional weight is length × width × height ÷ 139, and the calculator bills whichever is greater, dimensional or actual weight, except on Small Standard and Extra-Large above 150 lb, where Amazon uses unit weight alone. It detects the size tier for you: Small Standard, Large Standard, Small Bulky, Large Bulky and Extra-Large. Both 2026 changes are applied. Fulfillment fees are read from the price band your product falls into, under $10, $10 to $50, or over $50, so the same physical unit can cost different amounts to fulfill depending on what it sells for. The 3.5% fuel and logistics surcharge that starts on 17 April 2026 is calculated on the fulfillment fee and shown as its own line rather than folded into the total. Referral is applied per category, including the rates that change with price. What the page does not model: the separate ladders for apparel and dangerous goods, Low-Price FBA, and Ships in Product Packaging. Confirm your exact fees in Seller Central's Fee Preview.