.fba-calc-container {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
max-width: 900px;
margin: 20px auto;
background: #ffffff;
border: 1px solid #e0e0e0;
border-radius: 8px;
overflow: hidden;
color: #333;
}
.fba-calc-header {
background-color: #232f3e;
color: #ffffff;
padding: 25px;
text-align: center;
}
.fba-calc-header h2 { margin: 0; font-size: 24px; }
.fba-calc-header p { margin: 5px 0 0; opacity: 0.9; font-size: 14px; }
.fba-calc-body {
display: flex;
flex-wrap: wrap;
padding: 20px;
gap: 20px;
}
.fba-calc-inputs {
flex: 1;
min-width: 300px;
}
.fba-calc-results {
flex: 1;
min-width: 300px;
background-color: #f7f7f7;
padding: 20px;
border-radius: 8px;
border: 1px solid #ddd;
}
.input-row {
margin-bottom: 15px;
}
.input-row label {
display: block;
font-weight: 600;
margin-bottom: 5px;
font-size: 14px;
}
.input-row input {
width: 100%;
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
box-sizing: border-box;
font-size: 16px;
}
.calc-button {
background-color: #ff9900;
color: #000;
border: none;
padding: 15px;
width: 100%;
font-weight: bold;
font-size: 18px;
border-radius: 4px;
cursor: pointer;
transition: background 0.2s;
margin-top: 10px;
}
.calc-button:hover { background-color: #e68a00; }
.result-item {
display: flex;
justify-content: space-between;
padding: 12px 0;
border-bottom: 1px solid #eee;
}
.result-item:last-child { border-bottom: none; }
.result-label { font-weight: 500; }
.result-value { font-weight: bold; font-size: 18px; }
.profit-positive { color: #2e7d32; }
.profit-negative { color: #d32f2f; }
.article-section {
padding: 20px 40px;
line-height: 1.6;
border-top: 1px solid #eee;
}
.article-section h3 { color: #232f3e; margin-top: 25px; }
.fba-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
margin: 20px 0;
}
@media (max-width: 600px) {
.fba-calc-body { flex-direction: column; }
.fba-grid { grid-template-columns: 1fr; }
}
Summary
Total Revenue:
$0.00
Total Amazon Fees:
$0.00
Total Product Costs:
$0.00
Net Profit:
$0.00
Profit Margin:
0.00%
Return on Investment (ROI):
0.00%
How the Amazon FBA Profit Calculator Works
Selling on Amazon via Fulfillment by Amazon (FBA) involves several layers of costs that can quickly erode your margins. This calculator helps you look past the "top-line" revenue and understand exactly how much cash stays in your pocket after every sale.
Key Definitions
- Referral Fee: The commission Amazon takes for bringing you the customer (usually 15%).
- FBA Fee: The cost for Amazon to pick, pack, and ship your item to the customer.
- COGS: Cost of Goods Sold – what you paid the manufacturer per unit.
The Profit Formula
Profit = Sale Price – (COGS + Shipping to Amazon + Referral Fee + FBA Fee + Storage + Marketing Expenses).
ROI = (Net Profit / Product Cost) × 100.
3 Tips to Improve Your FBA Margins
- Optimize Packaging: FBA fees are based on weight and dimensions. Reducing your box size by even half an inch can move you into a lower fee tier.
- Monitor Storage Times: Amazon charges significantly more for "Aged Inventory" (over 180 days). Keep your inventory turnover high.
- Negotiate COGS: As your volume increases, renegotiate with your supplier. A $0.50 reduction in unit cost can lead to thousands in extra annual profit.
Example Calculation
If you sell a yoga mat for $40.00, and your manufacturing cost is $10.00, your initial "gross" looks great. However, after a 15% Referral Fee ($6.00), an FBA Fee of $7.50, and $1.50 in shipping/storage, your actual Net Profit is $15.00. This results in a 37.5% Margin and a 150% ROI on your inventory spend.
function calculateFbaProfit() {
var price = parseFloat(document.getElementById("fba_price").value) || 0;
var cost = parseFloat(document.getElementById("fba_cost").value) || 0;
var shipIn = parseFloat(document.getElementById("fba_shipping_in").value) || 0;
var referralPerc = parseFloat(document.getElementById("fba_referral_perc").value) || 0;
var fbaFee = parseFloat(document.getElementById("fba_pick_pack").value) || 0;
var storage = parseFloat(document.getElementById("fba_storage").value) || 0;
var marketing = parseFloat(document.getElementById("fba_marketing").value) || 0;
// Calculations
var referralAmount = price * (referralPerc / 100);
var totalAmazonFees = referralAmount + fbaFee + storage;
var totalOtherCosts = cost + shipIn + marketing;
var totalExpenses = totalAmazonFees + totalOtherCosts;
var netProfit = price – totalExpenses;
var profitMargin = 0;
if (price > 0) {
profitMargin = (netProfit / price) * 100;
}
var roi = 0;
if (cost > 0) {
roi = (netProfit / (cost + shipIn)) * 100;
}
// Update Display
document.getElementById("res_rev").innerText = "$" + price.toFixed(2);
document.getElementById("res_fees").innerText = "$" + totalAmazonFees.toFixed(2);
document.getElementById("res_total_costs").innerText = "$" + totalExpenses.toFixed(2);
var profitEl = document.getElementById("res_profit");
profitEl.innerText = "$" + netProfit.toFixed(2);
if (netProfit >= 0) {
profitEl.className = "result-value profit-positive";
} else {
profitEl.className = "result-value profit-negative";
}
document.getElementById("res_margin").innerText = profitMargin.toFixed(2) + "%";
document.getElementById("res_roi").innerText = roi.toFixed(2) + "%";
}