Free tool · Cratesignal

FBA profit margin, line by line.

Drop in a product’s sale price, landed cost, weight, and package dimensions. The calculator returns Amazon’s referral fee, FBA fulfillment + shipping cost, and monthly storage — plus net profit and margin % — so you can see which fee is eating your margin before you commit to ordering stock.

No signup
Stateless
Pricing snapshot: Amazon FBA US, 2024-Q4 schedule (v1).
Product inputs
Enter sale price, landed cost, weight, package dimensions, and the closest Amazon category. Leave storage months at 1 unless you are slow-turn inventory.

Manufacturing + freight + duties. Per unit.

Drives the Amazon referral-fee %.

1–12. Avg rate off-peak + peak.

Stateless: nothing is saved.
Your breakdown
Submit the form to see referral, fulfillment, and storage fees side by side.

How the numbers are calculated

Referral fee percentages come from Amazon Seller Central’s published category schedule (15% default, 8% electronics, 17% apparel, plus the $1.80 + 15% books rule and the $0.30 electronics minimum on items below $100). Fulfillment fees are picked from Amazon’s Standard vs. Large Standard vs. Bulky vs. Extra-Large size tiers using your weight and the longest / median / shortest dimensions. Monthly storage is computed as cubicFeet × $/ft³/month × months using the average of Amazon’s off-peak and peak per-cubic-foot rates.

When Amazon publishes a new rate card, update the constants in src/lib/business/fba-fees.ts (look for SCHEDULE_VERSION) and refresh the snapshot in this footer.

For questions or to flag a scheduling issue, write to cratesignal-3@polsia.app.