Amazon FBA Profit Calculator
See if an Amazon FBA product is worth selling. Enter price, cost, and Amazon's fees to get net profit per unit, margin, ROI, break-even price, and the maximum ad spend you can sustain.
Where each sale goes
How you compare
Fee & profit breakdown
📦 Try Amazon seller research tools
Check it outFBA fees add up fast
Amazon takes a referral fee (commonly ~15%) plus an FBA fulfillment fee and monthly storage. After product cost, inbound shipping, returns, and advertising, the profit that's left can be thin — so margin and ROI matter more than revenue. The break-even price is the floor you can't go below, and max profitable ACoS is the advertising ceiling before a sale loses money.
How it’s calculated
Net = price − referral % − FBA fee − storage − product − shipping − ads − return loss. Break-even price = fixed costs ÷ (1 − referral %).
Results update as you type and are estimates, not professional advice — verify important decisions with a qualified professional.
Worked example
A $25 product costing $6 with $1.50 shipping, 15% referral, $4 FBA and $2 ads nets ~$7/unit (28% margin, ~94% ROI); break-even price ~$16.74.
Common mistakes
- Forgetting storage, returns, and ad spend.
- Chasing revenue while the margin is razor-thin.
Where it is used
- Vetting a product before sourcing it.
- Finding the max ACoS before ads erase profit.
Frequently asked questions
What is ACoS?
Advertising Cost of Sale — ad spend as a percentage of sales. Stay below the 'max profitable ACoS' and your ads still leave a profit.
Why is ROI different from margin?
Margin is profit over price; ROI is profit over what you invested (product + shipping). ROI shows how hard your cash is working.
Are these the exact Amazon fees?
They're realistic defaults. Fees vary by category and product size — check Amazon's current fee schedule and enter your numbers.
Get the free Calculator Pack
One email with our most-used spreadsheets and new calculators. No spam.
Thanks! Check your inbox to confirm. (Demo form — connect to your email tool.)