.calc-container {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
max-width: 800px;
margin: 20px auto;
padding: 30px;
background: #ffffff;
border-radius: 12px;
box-shadow: 0 10px 25px rgba(0,0,0,0.1);
color: #333;
line-height: 1.6;
}
.calc-header {
text-align: center;
margin-bottom: 30px;
}
.calc-header h2 {
color: #1a73e8;
font-size: 28px;
margin-bottom: 10px;
}
.calc-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
margin-bottom: 25px;
}
@media (max-width: 600px) {
.calc-grid { grid-template-columns: 1fr; }
}
.input-group {
display: flex;
flex-direction: column;
}
.input-group label {
font-weight: 600;
margin-bottom: 8px;
font-size: 14px;
color: #555;
}
.input-group input {
padding: 12px;
border: 2px solid #e0e0e0;
border-radius: 8px;
font-size: 16px;
transition: border-color 0.3s;
}
.input-group input:focus {
border-color: #1a73e8;
outline: none;
}
.calc-btn {
background: #1a73e8;
color: white;
border: none;
padding: 15px 30px;
font-size: 18px;
font-weight: 700;
border-radius: 8px;
cursor: pointer;
width: 100%;
transition: background 0.3s;
}
.calc-btn:hover {
background: #1557b0;
}
.result-box {
margin-top: 30px;
padding: 20px;
background: #f8f9fa;
border-radius: 8px;
display: none;
}
.result-row {
display: flex;
justify-content: space-between;
padding: 10px 0;
border-bottom: 1px solid #eee;
}
.result-row:last-child { border-bottom: none; }
.result-label { font-weight: 500; }
.result-value { font-weight: 700; color: #1a73e8; }
.profit-positive { color: #28a745; }
.profit-negative { color: #dc3545; }
.article-section { margin-top: 40px; border-top: 1px solid #eee; padding-top: 30px; }
.article-section h3 { color: #222; margin-top: 25px; }
.example-box { background: #e7f3ff; padding: 20px; border-left: 5px solid #1a73e8; margin: 20px 0; }
Selling Price per Unit ($)
Cost of Goods (COGS) ($)
Shipping & Handling ($)
Total Ad Spend ($)
Total Units Sold
Other Fees (Tax/Platform) (%)
Calculate Business Health
Total Revenue:
Gross Profit per Unit:
Net Profit:
Net Profit Margin:
ROAS (Return on Ad Spend):
How to Calculate E-commerce Profitability
Understanding your numbers is the difference between a scaling business and one that burns through cash. To find your true profitability, you must look beyond the "Gross Margin" and account for variable costs like shipping, merchant fees, and customer acquisition costs (CAC).
The Core Formulas
Total Revenue: Selling Price × Units SoldGross Profit per Unit: Selling Price – (COGS + Shipping)Net Profit: Total Revenue – (Total COGS + Total Shipping + Ad Spend + Platform Fees)Net Margin: (Net Profit / Total Revenue) × 100
Realistic Example:
Imagine you sell a gadget for $100 . Your factory cost is $30 and shipping is $10 . You spend $1,000 on Facebook Ads to sell 50 units . Your platform (Shopify/Stripe) takes 3% .
Total Revenue: $5,000
Total Variable Costs: ($30+$10) × 50 = $2,000
Platform Fees: $150
Net Profit: $5,000 – $2,000 – $1,000 – $150 = $1,850
Net Margin: 37%
ROAS: 5.0x
Why ROAS and Net Margin Matter
High ROAS (Return on Ad Spend) doesn't always mean high profit. If your product margins are thin, a 4x ROAS might still result in a loss after shipping and labor. Use this calculator to find your "Break-even ROAS"—the point where your ad spend is covered by your gross margin.
function calculateEcomProfit() {
var price = parseFloat(document.getElementById('sellingPrice').value) || 0;
var cost = parseFloat(document.getElementById('productCost').value) || 0;
var shipping = parseFloat(document.getElementById('shippingCost').value) || 0;
var ads = parseFloat(document.getElementById('adSpend').value) || 0;
var units = parseFloat(document.getElementById('unitsSold').value) || 0;
var feePercent = parseFloat(document.getElementById('otherFees').value) || 0;
if (units <= 0 || price 0 ? (totalRevenue / ads) : 0;
// Display Results
document.getElementById('resultArea').style.display = 'block';
document.getElementById('resRevenue').innerText = '$' + totalRevenue.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById('resGrossPerUnit').innerText = '$' + grossPerUnit.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
var netProfitEl = document.getElementById('resNetProfit');
netProfitEl.innerText = '$' + netProfit.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
netProfitEl.className = 'result-value ' + (netProfit >= 0 ? 'profit-positive' : 'profit-negative');
document.getElementById('resMargin').innerText = netMargin.toFixed(2) + '%';
document.getElementById('resROAS').innerText = ads > 0 ? roas.toFixed(2) + 'x' : 'N/A (No Ad Spend)';
// Smooth scroll to results
document.getElementById('resultArea').scrollIntoView({ behavior: 'smooth', block: 'nearest' });
}