FBA Calculator

Amazon FBA answers

Straight answers to Amazon FBA questions - fees, storage, profitability, and the unit economics behind them. Free, no signup.

Last updated 7 September 2026

• Is a low Amazon TACOS actually profitable? Checking one seller's $520K case
  A seller reported 4.48% TACOS and 43.45% margin on $520K in sales. Check whether the numbers reconcile, what costs might be missing, and what a low TACOS does and does not prove.
• How to calculate your Amazon FBA break-even price
  Calculate your Amazon FBA break-even price and target-margin price with formulas, a worked example, variable fees, TACOS, and downside checks.
• How to calculate Amazon FBA landed cost per unit
  Calculate Amazon FBA landed cost per sellable unit, including freight, duty, brokerage, inspection, prep, and inbound costs, with six worked sourcing scenarios.
• Why your FBA profit calculator does not match your Seller Central payout
  Learn why FBA calculator profit differs from your Seller Central payout, then reconcile sales, fees, ads, refunds, reserves, and landed product cost.
• How to calculate Amazon FBA profit before buying inventory
  Calculate Amazon FBA profit before buying inventory with worked examples for online arbitrage, wholesale, and private label, plus downside checks before you commit cash.
• How to calculate an Amazon FBA return reserve per sale
  Calculate an Amazon FBA return reserve per sale using return rate, resellable share, loss severity, reimbursements, and a worked scenario range.
• Is this product worth selling on Amazon FBA?
  A margin doesn't prove demand and demand doesn't prove margin - the five checks to run, and the traps in each one, before you contact a supplier.
• How much cash do you need to start Amazon FBA?
  The first purchase order isn't your startup budget - the second order comes due before it sells out. Six scenarios that show why, with the real numbers.
• Why the FBA calculator says you'll lose money
  Almost always two input mistakes, not a real loss: inbound freight entered as a whole-shipment total instead of per unit, and FBM revenue quoted without the shipping the customer paid. Check both in under a minute.
• How to calculate true Amazon FBA profit per SKU
  Why a SKU that looks profitable still loses money: the costs left out of the usual formula, ACOS vs TACOS, COGS methods, and when SKU Economics is enough.
• What Amazon's FBA revenue calculator leaves out
  Amazon's revenue calculator has no field for freight into the warehouse, and none for volume. Here is the full cost of an FBM to FBA switch, and how to price it in minutes.