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Calculate your net margins, referral fees, and ROI instantly.

Sales Data

Amazon Fees

Net Profit

$0.00

Profit Margin

0%

ROI

0%

Total Amazon Fees

$0.00

How to Use the Amazon FBA Profit Calculator

To scale a successful Amazon business, understanding your Amazon FBA fees and net margins is critical. This calculator helps sellers break down every cost associated with a single unit sale, from manufacturing (COGS) to Amazon's fulfillment network costs.

Understanding the Core Metrics

• Referral Fees: This is Amazon's commission for selling on their platform. For most categories, this is 15% of the selling price.
• Fulfillment Fees: This covers the picking, packing, and shipping of your product to the customer. It is based on the weight and dimensions of your item.
• Net Profit: What stays in your pocket after paying for the product, shipping, and Amazon's cut.
• ROI (Return on Investment): This shows how hard your capital is working. An ROI of 100% means for every $1 you spend on stock and shipping, you get $1 back in profit.

Example Calculation

Let's say you sell a "Yoga Mat" for $35.00. Your manufacturing cost is $10.00 and it costs $2.00 to ship it to an Amazon warehouse. If the referral fee is 15% ($5.25) and the FBA fulfillment fee is $6.00, your calculation would look like this:

$35.00 (Price) – $10.00 (COGS) – $2.00 (Inbound Ship) – $5.25 (Referral) – $6.00 (FBA Fee) = $11.75 Profit.
Margin: 33.5% | ROI: 97.9%

Strategies to Increase FBA Margins

If your margins are below 20%, consider the following optimizations:

1. Product Sourcing: Negotiate lower unit costs with suppliers or optimize packaging to reduce weight/dimensions.
2. Fulfillment Tier: Check if your product is slightly over a weight threshold. Reducing weight by even 1 ounce can save you dollars in FBA fees.
3. Price Testing: A small $1.00 increase in selling price often flows directly to net profit, significantly boosting ROI.

function calculateFBAProfit() { // Get values from inputs var sellingPrice = parseFloat(document.getElementById('fba_sellingPrice').value) || 0; var itemCost = parseFloat(document.getElementById('fba_itemCost').value) || 0; var shipToAmazon = parseFloat(document.getElementById('fba_shippingToAmazon').value) || 0; var referralRate = parseFloat(document.getElementById('fba_referralRate').value) || 0; var fulfillmentFee = parseFloat(document.getElementById('fba_fulfillmentFee').value) || 0; var otherCosts = parseFloat(document.getElementById('fba_otherCosts').value) || 0; // Calculations var referralFeeAmount = (sellingPrice * (referralRate / 100)); var totalAmazonFees = referralFeeAmount + fulfillmentFee; var totalExpenses = itemCost + shipToAmazon + totalAmazonFees + otherCosts; var netProfit = sellingPrice – totalExpenses; var profitMargin = (sellingPrice > 0) ? (netProfit / sellingPrice) * 100 : 0; // ROI calculation based on capital outlay (product + shipping) var capitalInvested = itemCost + shipToAmazon; var roi = (capitalInvested > 0) ? (netProfit / capitalInvested) * 100 : 0; // Display results document.getElementById('fba_results').style.display = 'block'; document.getElementById('res_netProfit').innerText = '$' + netProfit.toFixed(2); document.getElementById('res_margin').innerText = profitMargin.toFixed(1) + '%'; document.getElementById('res_roi').innerText = roi.toFixed(1) + '%'; document.getElementById('res_totalFees').innerText = '$' + totalAmazonFees.toFixed(2); // Color formatting for profit if(netProfit < 0) { document.getElementById('res_netProfit').style.color = '#c62828'; } else { document.getElementById('res_netProfit').style.color = '#2e7d32'; } }