Amazon FBA Calculator

Add up four things: the referral fee (a percentage of your sale price, usually 8–15% depending on category), the FBA fulfillment fee (based on your product's size tier and shipping weight, plus a 3.5% fuel surcharge in 2026), monthly storage (charged per cubic foot), and situational fees like inbound placement or the low-inventory-level fee. The calculator on this page does all of it from your price, cost, dimensions, and weight — and shows the per-unit breakdown line by line.

The main ones: referral fees (typically 8–15% of price), FBA fulfillment fees (from about $2.51 with the fuel surcharge for the smallest, cheapest items up to $200+ for extra-large products), monthly inventory storage ($0.78/cu ft standard-size from January–September, $2.40/cu ft October–December), inbound placement service fees (up to about $1.90 per standard-size unit for single-location sends), the low-inventory-level fee, aged inventory surcharges from 181 days, and returns processing fees for apparel or high-return products.

Yes — completely free, no account, no email, no login. Enter your numbers and get the full fee breakdown instantly. You can also copy a link to any result to share it in a forum post, spreadsheet, or with a business partner.

Fee tables are transcribed from Amazon's official 2026 US rate cards: non-peak fulfillment fees effective January 15, 2026, with the 3.5% fuel and logistics surcharge applied since April 17, 2026, current referral percentages by category, and 2026 storage, placement, and low-inventory rates. Inbound placement fees vary by region, so we use the midpoint of Amazon's published range and show you the full range. Always confirm final fees for a specific ASIN in Seller Central — Amazon bills on its own warehouse measurements, not your listing data.

Since April 17, 2026, Amazon applies a 3.5% fuel and logistics surcharge to all FBA fulfillment fees in the US. A $5.00 base fulfillment fee actually bills at about $5.18. Most fee tables published before April 2026 don't include it — this calculator applies it automatically and shows it as its own line.

Dimensional weight is length × width × height (in inches) divided by 139, expressed in pounds. For large standard, bulky, and most extra-large products, Amazon bills the greater of actual weight and dimensional weight — so a light but boxy product gets charged as if it were heavier. Small standard items are always billed on actual weight. Bulky and extra-large items are calculated with a minimum 2-inch width and height.

Every product falls into one of eight tiers based on packed dimensions and shipping weight: small standard (≤16 oz, ≤15×12×0.75 in), large standard (≤20 lb, ≤18×14×8 in), small bulky (new for 2026: ≤50 lb, ≤37×28×20 in), large bulky, and four extra-large weight bands. Your tier determines the fulfillment fee schedule, so a small packaging change that bumps you into a higher tier can quietly add dollars per unit. The size tier inspector in this calculator shows your tier and flags when a cheaper tier is within reach.

When you send inventory to a single Amazon location and let Amazon distribute it, you pay a per-unit placement fee — roughly $0.14–$1.90 for standard-size units and up to about $6.50 for large bulky, depending on size, weight, and region. Choosing Amazon's optimized shipment split (sending to 5+ locations yourself) makes the fee $0. Amazon's own revenue calculator doesn't include this fee, which is why real payouts often come in lower than sellers expect.

If your product's historical days of supply stay below 28 days (on both 30-day and 90-day averages), Amazon adds a per-unit fee to everything you ship — up to $0.89 for small standard and $2.09 for large bulky units in 2026. It's calculated at the FNSKU level. Keeping roughly 4+ weeks of sellable inventory in the network avoids it, which is a big reason sellers hold reserve stock at a nearby 3PL and feed FBA continuously.

In 2026, monthly storage is $0.78 per cubic foot for standard-size and $0.56 for oversize from January through September, jumping to $2.40 and $1.40 respectively in October–December. On top of that, aged inventory surcharges start at 181 days (from $0.50/cu ft, climbing steeply past 271 days), and long-tenured sellers with slow-turning inventory can also owe a storage utilization surcharge.

The January 15, 2026 update raised fulfillment fees about $0.08 per unit on average, split rate cards into three price bands (under $10, $10–$50, over $50), introduced the cheaper Small Bulky tier, and added an overmax handling fee for very large items. On April 17, 2026, a 3.5% fuel and logistics surcharge was added to all fulfillment fees. Referral percentages and base storage rates didn't change — and separately, Amazon discontinued its own FBA prep and labeling services on January 1, 2026.

Most experienced sellers target a net margin of 15–25% after all Amazon fees, landed cost, and advertising. Below 10%, one fee change or ad-cost spike can erase your profit — the 2026 fuel surcharge alone shaved measurable margin off thin listings. Use the margin and max-TACoS outputs above to see how much advertising headroom your product actually has.

No. Amazon discontinued its FBA prep and item labeling services on January 1, 2026. Every unit must now arrive at Amazon's warehouses fully prepped — labeled, poly-bagged, bundled, and compliant — or risk being refused or charged for noncompliance. Sellers handle prep themselves or use a third-party prep center like 3PLGuys, an Amazon SPN-certified warehouse 15 minutes from the Port of Long Beach.

Both. It itemizes every 2026 Amazon fee (fee calculator), then nets them against your price, landed cost, ad spend, and returns to project per-unit and monthly revenue, profit, margin, and ROI (revenue calculator). It also adds what most tools skip: breakeven price, maximum profitable TACoS, and a size-tier advisor that shows when smaller packaging would cut your fees.