Understanding your numbers is the difference between a successful Amazon business and one that loses money. Our Amazon FBA Profit Calculator helps you determine the exact net margin after all platform fees and overheads are accounted for.
Key Components of FBA Fees
To use this calculator effectively, you should understand the primary expenses involved in Fulfillment by Amazon:
Referral Fee: This is Amazon's "commission." For most categories, this is 15% of the total sales price.
Fulfillment Fee (FBA Fee): This is the cost for Amazon to pick, pack, and ship your product. It is determined by the weight and dimensions of your item.
Product Cost (COGS): The amount you paid the manufacturer to produce the item.
Inbound Shipping: The cost to send your inventory from your location or supplier to Amazon's warehouse.
Example Profit Scenario
Let's look at a realistic example for a standard size product:
Sale Price
$30.00
Product Cost
$7.00
Referral Fee (15%)
$4.50
FBA Fee
$6.00
Final Profit
$12.50
The Importance of ROI vs. Margin
While Margin tells you how much of your revenue is profit, ROI (Return on Investment) tells you how hard your money is working. A 100% ROI means for every $1 you spend on product costs, you get $1 back in profit.
function calculateFBAProfit() {
var salePrice = parseFloat(document.getElementById('salePrice').value);
var productCost = parseFloat(document.getElementById('productCost').value);
var shippingToAmz = parseFloat(document.getElementById('shippingToAmz').value);
var fbaFee = parseFloat(document.getElementById('fbaFee').value);
var referralRate = parseFloat(document.getElementById('referralRate').value);
var miscCosts = parseFloat(document.getElementById('miscCosts').value);
if (isNaN(salePrice) || isNaN(productCost) || isNaN(fbaFee)) {
alert("Please enter valid numbers for price, cost, and fees.");
return;
}
var referralFeeAmount = salePrice * (referralRate / 100);
var totalAmazonFees = referralFeeAmount + fbaFee;
var totalCosts = productCost + shippingToAmz + totalAmazonFees + miscCosts;
var netProfit = salePrice – totalCosts;
var margin = (netProfit / salePrice) * 100;
var totalInvestment = productCost + shippingToAmz;
var roi = (netProfit / totalInvestment) * 100;
document.getElementById('resProfit').innerHTML = '$' + netProfit.toFixed(2);
document.getElementById('resMargin').innerHTML = margin.toFixed(2) + '%';
document.getElementById('resROI').innerHTML = roi.toFixed(2) + '%';
document.getElementById('resTotalFees').innerHTML = '$' + totalAmazonFees.toFixed(2);
var resultBox = document.getElementById('fbaResults');
resultBox.style.display = 'block';
if (netProfit < 0) {
document.getElementById('resProfit').style.color = '#d32f2f';
document.getElementById('resMargin').style.color = '#d32f2f';
document.getElementById('resROI').style.color = '#d32f2f';
} else {
document.getElementById('resProfit').style.color = '#2e7d32';
document.getElementById('resMargin').style.color = '#2e7d32';
document.getElementById('resROI').style.color = '#2e7d32';
}
}