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Fulfillment by Amazon (FBA) Math

Amazon FBA Profit Calculator

Estimate net profit, margin %, referral fees, FBA fulfillment costs, storage fees, and target selling price with transparent, editable assumptions.

2026 US planning tool, reviewed 2026-08-15. Use this calculator for one ASIN or order. Use the Amazon FBA fees guide to identify fee types and choose current fulfillment and storage inputs before relying on the defaults.

Order & Fee Inputs

Financial Disclaimer: Estimates only. Seller Math Hub is an independent calculator tool and is not affiliated with Etsy, Amazon, Shopify, eBay, PayPal, Stripe, or TikTok. Calculations do not constitute financial, legal, accounting, or business advice.

Estimated Net Payout & Profit

How to calculate Amazon FBA profit

Start with item revenue and any shipping charged to the customer. Subtract the category referral fee, the ASIN-specific FBA fulfillment fee, a realistic per-unit storage allocation, product cost, inbound transportation, prep and packaging, advertising, and other seller costs.

Estimated FBA profit = order revenue - referral fee - fulfillment fee - storage allocation - product, inbound, prep, advertising, and other seller costs

The target-price result solves for the item price needed to reach the selected margin after the editable referral percentage and fixed cost inputs.

How to choose the 2026 fee inputs

  1. Use Amazon's Fee Preview or Revenue Calculator for the product's current fulfillment amount.
  2. Include the applicable 3.5% fuel and logistics surcharge in the fulfillment-fee input. For example, a $4.50 base fee becomes about $4.66 after the surcharge.
  3. Enter a per-unit storage allocation based on packaged cubic volume and expected storage time.
  4. Use the referral rate for the ASIN's actual category rather than assuming every product uses 15%.
  5. Add inbound transportation, prep, advertising, and product costs from your own invoices and reports.

Worked Amazon FBA example

A $30 order with a 15% referral rate, $4.66 surcharge-adjusted fulfillment fee, $0.50 storage allocation, $8 product cost, $1 inbound cost, $0.50 prep, and $3 advertising has estimated profit of $7.84. Estimated margin is about 26.1% before omitted or account-specific fees.

Important limitations

  • The calculator does not identify size tier from dimensions or weight.
  • It does not automatically add inbound placement, low-inventory-level, aged-inventory, removal, return-processing, or account-specific charges.
  • Storage is modeled as an editable per-unit amount rather than a live cubic-foot inventory calculation.
  • Results are planning estimates and should be reconciled with settlement and fee-preview reports.