Amazon FBA Calculator (US)
Estimate your per-unit profit, margin, ROI, and break-even price for Amazon US listings.
Why use an FBA calculator for Amazon US?
If you sell on Amazon, profit can disappear fast when fees are ignored. A simple FBA calculator helps you estimate whether a product is truly worth listing before you spend money on inventory. By entering your expected selling price and per-unit costs, you can quickly see if your margins are healthy enough for a competitive marketplace.
The calculator above is built for common US FBA scenarios. It gives you fast visibility into referral fees, fulfillment costs, total cost per unit, and expected monthly profit.
How to use this FBA calculator
- Enter your expected selling price on Amazon US.
- Add your COGS (cost of goods sold) per unit.
- Set your referral fee percentage (many categories are around 15%).
- Enter your FBA fulfillment fee based on product size/weight tier.
- Include inbound shipping, prep, storage, and other costs.
- Add expected monthly units sold to estimate monthly net profit.
Click Calculate Profit to see your output. If your margin is thin, adjust price or costs and rerun scenarios instantly.
What costs matter most in Amazon FBA US?
1) Referral fee
This is a percentage of your selling price charged by Amazon. Because it scales with price, it directly affects your break-even point.
2) FBA fulfillment fee
This is usually one of the largest fixed per-unit costs. It depends on package size and shipping weight. Incorrect size-tier assumptions can distort your profitability estimate.
3) Landed product cost
Your COGS plus inbound shipping and prep costs are the true investment per unit. Strong sellers negotiate this down over time to improve ROI.
4) Storage and overhead
Even if storage per unit looks small, it adds up when inventory turns slowly. Include advertising, return allowances, and miscellaneous expenses for a more realistic model.
Example decision framework
A good way to evaluate a product is to set minimum thresholds before sourcing:
- Target margin: at least 15% to 25% after all fees
- Target ROI: often 30%+ for private label planning
- Break-even buffer: keep room for promotions and PPC spend
- Inventory turn: avoid long storage exposure on slow movers
If a product fails one of these thresholds, test a better sourcing cost, bundle strategy, or different price point before committing.
Ways to improve your FBA profit
- Reduce package size to lower FBA fees.
- Negotiate suppliers for lower unit cost at stable quality.
- Optimize listing conversion so you can maintain stronger pricing.
- Improve inventory turnover to reduce storage drag.
- Track ad spend by SKU and pause weak campaigns early.
Final thoughts
An FBA calculator for Amazon US is one of the most practical tools for smarter product selection. Instead of guessing, you can model realistic outcomes and make decisions with confidence. Use the calculator regularly during sourcing, repricing, and inventory planning to protect your margins and build a healthier ecommerce business.