Most sellers know their sale price. Almost none know their true profit per unit after every Amazon fee. Enter five numbers and find out if your product actually makes money.
Net profit · margin · ROI · break-even ACoS
Estimates use the current published FBA rate card (referral + fulfillment by size tier + monthly storage). Confirm exact fees in Seller Central before a large purchase order.
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Here's what happens to most sellers. The product sells for thirty dollars. Cost is six fifty. Feels like a fat margin, so they scale ad spend, order deeper, and hire help.
Then the disbursement hits and the math stops mathing. Referral fee took 15%. Fulfillment took another five or six bucks. Storage nibbled the rest. The "70% margin" was actually 18%, and the ads were eating 20. They were paying Amazon for the privilege of shipping boxes.
You can't fix a number you've never seen. That's the whole reason this calculator exists.
Price, cost, inbound shipping, weight, and dimensions. Everything you already know off the top of your head.
Size tier, referral fee, fulfillment fee, and storage get applied automatically from the current rate card.
True profit per unit, margin, ROI, and the one number your PPC manager needs: break-even ACoS.
It uses the current published FBA rate card for referral and fulfillment fees by size tier. Your exact fee can vary slightly by sub-category and dimensional weight, so treat it as a tight estimate and confirm in Seller Central before a big buy.
It's your pre-ad margin expressed as a percent of sale price. Run campaigns above that number and every click loses money. If you've never checked yours, check it today. This is the most common leak we find in audits.
Yes. Run it as many times as you want, no account. Drop your email only if you want the breakdown sent to you.
Yes. Dimensions and weight assign the size tier automatically, including large standard and bulky tiers.
Margin is only half the profit equation. The other half is how much revenue your listing gives away before anyone clicks Buy. Our free Profit Audit scans your product page and shows you, in dollars, what a weak page costs you per thousand visitors.
Run My Free Profit Audit → Takes about 2 minutes. You get the exact fixes, not a sales pitch.