FBA Profit Worksheet.
Know your true unit economics before you launch or restock. See net profit, margin, and ROI after every Amazon fee.
No login, no email, no signup — calculations run entirely in your browser.
- Net profit per unit after all Amazon fees
- Net margin % on sale price
- Return on cost (ROI) %
- Total Amazon fees per unit
Frequently Asked Questions
Is the Amazon FBA profit calculator free?
Yes. The calculator runs entirely in your browser with no login, email, or signup. Nothing is sent to a server.
How is FBA net profit per unit calculated?
Net profit = sale price − COGS − referral fee − FBA fulfillment fee − inbound shipping − other costs. The referral fee is your sale price multiplied by the referral percentage (15% for most categories).
What is a healthy Amazon FBA net margin?
Most private-label sellers aim for 15–30% net margin after all Amazon fees but before ad spend, leaving room for advertising while staying profitable.