Success on Amazon hinges on understanding your numbers. This Amazon FBA Profit Calculator helps you determine exactly how much you'll take home after Amazon deducts their fees and you cover your operating costs. To get an accurate reading, follow these steps:
Selling Price: The final price customers pay on Amazon.
COGS (Cost of Goods Sold): What you pay your manufacturer per unit, including any packaging costs.
Referral Fee: Amazon's "commission" for selling on their platform (usually 15% for most categories).
Fulfillment Fee: The cost for Amazon to pick, pack, and ship your order.
PPC Costs: Your advertising budget divided by the number of units sold.
Example Calculation
Imagine you sell a Yoga Mat for $40.00. Your manufacturing cost is $10.00. Shipping it to the Amazon warehouse costs $1.00 per unit. Amazon takes a 15% referral fee ($6.00) and charges an FBA fulfillment fee of $5.50. You spend roughly $3.00 per unit on PPC ads.
Your total expenses would be $25.50 ($10 + $1 + $6 + $5.50 + $3). Your Net Profit would be $14.50, resulting in a 36.25% Margin and a 145% ROI. Tracking these metrics ensures you aren't just making sales, but making money.
Understanding Profit Margin vs. ROI
Profit Margin tells you how much of every dollar of revenue you keep as profit. A 20-30% margin is generally considered healthy for FBA sellers. ROI (Return on Investment) tells you the efficiency of your capital. If you spend $10 on a product and make $10 in profit, your ROI is 100%. High ROI allows you to reinvest and scale your inventory faster.
function calculateFBAProfit() {
var salePrice = parseFloat(document.getElementById('fba_sale_price').value) || 0;
var itemCost = parseFloat(document.getElementById('fba_item_cost').value) || 0;
var shipToAmazon = parseFloat(document.getElementById('fba_shipping_to_amazon').value) || 0;
var referralRate = parseFloat(document.getElementById('fba_referral_fee').value) || 0;
var fulfillmentFee = parseFloat(document.getElementById('fba_fulfillment_fee').value) || 0;
var storageFee = parseFloat(document.getElementById('fba_monthly_storage').value) || 0;
var ppcCosts = parseFloat(document.getElementById('fba_ppc_costs').value) || 0;
var otherCosts = parseFloat(document.getElementById('fba_other_costs').value) || 0;
if (salePrice 0) ? (netProfit / (itemCost + shipToAmazon)) * 100 : 0;
// Update Results
document.getElementById('res_total_fees').innerHTML = "$" + totalAmazonFees.toFixed(2);
document.getElementById('res_total_expenses').innerHTML = "$" + totalExpenses.toFixed(2);
var profitEl = document.getElementById('res_net_profit');
profitEl.innerHTML = "$" + netProfit.toFixed(2);
profitEl.className = netProfit >= 0 ? "fba-result-value fba-profit-positive" : "fba-result-value fba-profit-negative";
document.getElementById('res_margin').innerHTML = profitMargin.toFixed(2) + "%";
document.getElementById('res_roi').innerHTML = roi.toFixed(2) + "%";
// Show Results Area
document.getElementById('fba_results_area').style.display = 'block';
}