Free Amazon seller tool
Amazon FBA profit calculator
Short answer
This calculator estimates Amazon FBA profit per unit after landed cost, referral fee, fulfillment fee, storage, advertising and returns. The referral fee table and the 2026 US FBA rate cards are built in, so entering packaged dimensions and weight derives the fulfillment fee rather than asking you to look it up. Every derived fee can be overridden.
Calculate Amazon FBA profit
Enter packaged dimensions and weight and the fulfillment fee is derived from Amazon’s 2026 rate cards. Any derived fee can be typed over, and both figures stay visible.
Price and cost
Sellable unit delivered into Amazon
Counts toward the referral fee
Amazon's fee category, which may differ from the browse category shoppers see
Packaged size and weight
Fully packaged and ready to ship
Amazon fees
Derived from your dimensions. Type to override.
Monthly storage allocated across units sold
Spend and volume
Ad spend as a share of total revenue
Coupons, software, inspection
Profit per unit
$0.66
Profit margin
2.6%
ROI on landed cost
6.6%
Break-even ACoS
12.6%
Profit margin before ads
Monthly profit
$198.00
Profit before ads
$3.16
What a $25.00 Amazon sale leaves
How Amazon sizes this unit
Fulfillment fees come from Amazon's 2026 US rate cards. The 3.5% fuel and logistics surcharge applies from April 17, 2026; Amazon publishes no worked example that includes it, so we apply it to the rate-card fee and round to cents.
The referral fee is not one number
Amazon charges a percentage of the total sales price - item price plus delivery charged plus gift wrap, excluding tax - or a per-item minimum, whichever is greater. The minimum is $0.30 in most categories. What varies, and what most calculators get wrong, is how the percentage is applied.
Some categories are cliffs: cross the threshold and the whole price re-rates. Clothing charges 10% at a $20.00 total sales price and 17% at $20.01 - $2.00 becomes $3.40 over a single cent. Others are brackets, working like income tax, where only the portion above the threshold takes the second rate. Electronics Accessories at $150 costs $19.00, not the $12.00 a cliff reading would give.
| Rule type | Example category | At the threshold | Just above it |
|---|---|---|---|
| Cliff | Clothing and Accessories | $20.00 → $2.00 (10%) | $20.01 → $3.40 (17%) |
| Cliff | Lawn Mowers and Snow Throwers | $500.00 → $75.00 (15%) | $500.01 → $40.00 (8%) |
| Bracket | Electronics Accessories | $100 → $15.00 (15%) | $150 → $19.00 (15% + 8%) |
| Bracket | Furniture | $200 → $30.00 (15%) | $250 → $35.00 (15% + 10%) |
Because cliff categories make profit discontinuous in price, this calculator deliberately does not offer a single break-even price on Amazon. A search across a cliff would report a number that is wrong on one side of it.
How the fulfillment fee is built
Four things decide it: size tier, shipping weight, product type and price band. Size tier comes from the fully packaged unit, and all criteria must hold - a product 18.1 inches long is in a different and more expensive tier than one 17.9 inches long.
| Tier | Max weight | Longest | Median | Shortest | Length + girth |
|---|---|---|---|---|---|
| Small standard | 16 oz | 15 in | 12 in | 0.75 in | — |
| Large standard | 20 lb | 18 in | 14 in | 8 in | — |
| Small Bulky | 50 lb | 37 in | 28 in | 20 in | 130 in |
| Large Bulky | 50 lb | 59 in | 33 in | 33 in | 130 in |
| Extra-Large | banded 0-50 / 50+-70 / 70+-150 / 150+ lb | — | — | — | — |
Shipping weight is the greater of unit weight and dimensional weight, where dimensional weight is longest x median x shortest divided by 139. Small standard and Extra-Large 150+ lb units use unit weight only. For Small Bulky, Large Bulky and Extra-Large, Amazon assumes a minimum width and height of 2 inches, which is why a 40 x 1 x 25 inch board is charged on 14.4 lb rather than 7.2 lb.
Heavier tiers charge a base fee plus an increment, and a started interval is a charged interval. Amazon's own iron example is 0.35 lb over the 3 lb base - 1.4 four-ounce intervals - and is billed for 2, giving $7.13 rather than $7.05.
How this calculator works
| Output | Formula |
|---|---|
| Revenue | selling price + delivery charged to buyer |
| Referral fee | greater of (category rate applied to revenue) and the per-item minimum |
| Dimensional weight | longest x median x shortest / 139 |
| Shipping weight | greater of unit weight and dimensional weight, tier permitting |
| Fulfillment fee | rate card base + ceil(excess / interval) x interval rate |
| Fuel surcharge | fulfillment fee x 3.5%, from April 17 2026 |
| Storage per month | average daily units x volume in cubic feet x rate |
| Storage per unit sold | monthly storage / units sold per month |
| Profit | revenue - landed cost - referral - fulfillment - storage - ads - returns - other |
| Profit margin | profit / revenue x 100 |
| ROI | profit / landed cost x 100 |
| Break-even ACoS | (profit + ad spend) / revenue x 100 |
Every fee is rounded to cents before it is summed, and monthly figures are the rounded per-unit result multiplied by volume - that is how Amazon actually charges.
Rates come from Seller Central and sell.amazon.com: Referral fees, selling fees, 2026 US FBA fulfillment fee changes, Product size tiers and Monthly inventory storage fees. The engine reproduces all twelve of Amazon's published worked fulfillment examples and both storage examples exactly.
Where Amazon's documentation disagrees with itself
Four contradictions turned up while building this, and rather than quietly picking a reading, each is named here so you can confirm anything that matters to your pricing.
| Item | The disagreement | What we do |
|---|---|---|
| Dry erase board size tier | The example page calls a 40 x 1 x 25 inch board "Small Bulky", but Small Bulky caps the longest side at 37 inches. | Follow the normative size-tier table, which makes it Large Bulky, and flag it in the results. |
| Flat Large standard dimensional weight | The 2-inch minimum width and height is documented for Small Bulky, Large Bulky, Overmax and Extra-Large only, but Amazon’s own T-shirt example (13 x 9 x 0.85 in, 5.40 oz) is published at 1.65 lb and charged $6.14 — a figure the stated formula does not produce. | Follow the normative rule, and where the two readings differ, show what the other one would charge. |
| Fine Art referral fee | sell.amazon.com applies the brackets to "Sales Proceeds" with a $1.00 minimum; Seller Central says "total sales price" with no minimum. | Take Seller Central’s wider basis and sell.amazon.com’s $1.00 minimum, so the fee errs high, and warn on the category. |
| Media closing fee | The $1.80 per-item closing fee appears on sell.amazon.com but is absent from the Seller Central referral page. | Include it, because leaving it out understates every media sale, and label it. |
What this does not do
One number on this page is an assumption rather than a quotation. Amazon publishes no worked example that applies the 3.5% fuel and logistics surcharge, so its rounding is our reading: we multiply the rate-card fee by 1.035 and round to cents. Everything else reproduces a figure Amazon has published.
Costs this calculator does not model
Each of the following has its own eligibility rules that a general calculator cannot check for your account, so including a guess would be worse than excluding it: the low-inventory-level fee, the inbound placement service fee, the returns processing fee, the aged inventory surcharge, SIPP discounts and Overmax handling. Overmax is detected and flagged in the results, but not priced. All the arithmetic is the amazon.com US store; the currency selector changes the symbol only and converts nothing.
Amazon FBA profit calculator FAQ
Amazon charges a percentage of the total sales price - item price plus delivery charged plus gift wrap, excluding tax - or a per-item minimum, whichever is greater. The minimum is $0.30 in most categories. The percentage varies by category and, in several categories, by price.
Because some categories are priced at a cliff rather than in brackets. Clothing charges 10% on a total sales price of $20.00 but 17% on $20.01 - on the whole price, not just the extra cent. That takes the fee from $2.00 to $3.40. Other categories, like Electronics Accessories and Furniture, are bracketed like income tax, where only the portion above the threshold is charged at the second rate. This calculator implements each category the way Amazon words it.
From four things: the size tier, the shipping weight, the product type and the price band. Shipping weight is the greater of unit weight and dimensional weight (length x width x height / 139), except for Small standard and Extra-Large 150+ lb units, which use unit weight only. Heavier tiers add a per-interval charge above a base weight, and a started interval counts as a whole one.
Three: under $10, $10-$50, and over $50. Amazon states that items priced at exactly $10 and exactly $50 fall in the $10-$50 band. Products under $10 automatically receive Low-Price FBA rates.
The advertising cost of sales at which your profit reaches zero - equal to your profit margin before advertising. Above it you are buying sales at a loss. Note the advertising input here is spend as a percentage of total revenue, closer to TACoS than to campaign ACoS, because that is what a per-unit model can express.
Yes. Amazon charges holiday peak fulfillment rates from October 15, 2026 to January 14, 2027, and a 3.5% fuel and logistics surcharge applies from April 17, 2026. The calculator picks the season from the date and shows the surcharge as its own line.
The low-inventory-level fee, the inbound placement service fee, the returns processing fee, the aged inventory surcharge, SIPP discounts and Overmax handling. Each has its own eligibility rules that a general calculator cannot check. Overmax is detected and flagged, but not priced. Everything here is the amazon.com US store.
Seller Central and sell.amazon.com. Referral rates come from the Referral fees reference, cross-checked against sell.amazon.com/pricing; the rate cards are the 2026 US FBA fulfillment fee tables; storage rates come from the Monthly inventory storage fees page. The engine reproduces ten of Amazon’s twelve published worked fee examples exactly. The twelfth, a T-shirt, is priced from a dimensional weight Amazon publishes but no stated formula produces; we follow the normative rule and show what the other reading would cost.
These fees change without telling you.
Amazon revises FBA rates every year and re-measures products mid-stream. Notifcentral watches eight fee types on your catalogue and pages your phone when one moves, so the margin you priced is the margin you keep.
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