How to Calculate Floating Rate of Interest

.fba-calc-container { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; max-width: 800px; margin: 20px auto; padding: 25px; border: 1px solid #e0e0e0; border-radius: 12px; background-color: #ffffff; color: #333; box-shadow: 0 4px 15px rgba(0,0,0,0.05); } .fba-calc-header { text-align: center; margin-bottom: 30px; } .fba-calc-header h2 { margin: 0; color: #232f3e; font-size: 28px; } .fba-calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; } .fba-input-group { margin-bottom: 15px; } .fba-input-group label { display: block; font-weight: 600; margin-bottom: 8px; font-size: 14px; color: #444; } .fba-input-group input { width: 100%; padding: 12px; border: 1px solid #cccccc; border-radius: 6px; font-size: 16px; box-sizing: border-box; } .fba-input-group input:focus { outline: none; border-color: #ff9900; box-shadow: 0 0 5px rgba(255, 153, 0, 0.3); } .fba-calc-btn { grid-column: span 2; background-color: #ff9900; color: #000; border: none; padding: 15px; border-radius: 6px; font-size: 18px; font-weight: 700; cursor: pointer; transition: background-color 0.2s; margin-top: 10px; } .fba-calc-btn:hover { background-color: #e68a00; } .fba-results { margin-top: 30px; padding: 20px; background-color: #f3f3f3; border-radius: 8px; display: none; } .fba-result-row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid #ddd; } .fba-result-row:last-child { border-bottom: none; } .fba-result-label { font-weight: 500; } .fba-result-value { font-weight: 700; font-size: 18px; } .text-success { color: #2e7d32; } .text-danger { color: #d32f2f; } .fba-article { margin-top: 40px; line-height: 1.6; color: #333; } .fba-article h3 { color: #232f3e; border-left: 5px solid #ff9900; padding-left: 15px; margin-top: 25px; } @media (max-width: 600px) { .fba-calc-grid { grid-template-columns: 1fr; } .fba-calc-btn { grid-column: 1; } }

Amazon FBA Profit Calculator

Calculate your net profit, margins, and ROI for Amazon FBA products.

Total Amazon Fees:
Total Landed Cost:
Net Profit:
Net Margin:
Return on Investment (ROI):

How the Amazon FBA Profit Calculator Works

Success on Amazon depends on understanding your "true" profit after all fees are deducted. This Amazon FBA Profit Calculator helps you break down the various costs associated with selling on the platform. To use the tool, input your estimated selling price and the cost of goods sold (COGS). The calculator then factors in Amazon's referral fee (the commission Amazon takes), fulfillment fees (the cost of picking, packing, and shipping), and your logistical expenses.

Understanding Key FBA Fees

Referral Fees: This is essentially a commission paid to Amazon for every item sold. For most categories, this is 15%, but it can range from 8% to 45% depending on the niche.

Fulfillment Fees: These are the per-unit fees for Amazon to ship your product from their warehouse to the customer. This price varies based on the size and weight of your product.

Storage Fees: Amazon charges for the space your inventory occupies. These fees increase significantly during the Q4 holiday season.

Example Calculation

Imagine you are selling a yoga mat for $40.00. Your costs are as follows:

  • COGS: $10.00
  • Shipping to Amazon: $2.00
  • Referral Fee (15%): $6.00
  • FBA Fulfillment Fee: $7.50
  • PPC Advertising: $4.00

In this scenario, your total costs are $29.50. Your Net Profit would be $10.50 per unit, resulting in a 26.25% Profit Margin and a 105% ROI.

Why Monitoring Profit Margins is Critical

Many sellers focus only on "Revenue," but revenue is a vanity metric. If your net margin is below 15%, you may not have enough cushion to handle product returns, price wars, or rising PPC costs. A healthy FBA business typically aims for a profit margin of 20-30% and an ROI of 100% or higher.

function calculateFBAProfit() { var sellPrice = parseFloat(document.getElementById('sellingPrice').value) || 0; var prodCost = parseFloat(document.getElementById('productCost').value) || 0; var shipToAmz = parseFloat(document.getElementById('shippingToAmazon').value) || 0; var refFeePer = parseFloat(document.getElementById('referralFee').value) || 0; var fulfillFee = parseFloat(document.getElementById('fbaFulfillment').value) || 0; var storageFee = parseFloat(document.getElementById('monthlyStorage').value) || 0; var adSpend = parseFloat(document.getElementById('advertising').value) || 0; var miscCosts = parseFloat(document.getElementById('otherCosts').value) || 0; if (sellPrice 0 ? (netProfit / totalInvestment) * 100 : 0; // Display Results document.getElementById('fbaResults').style.display = 'block'; document.getElementById('resTotalFees').innerHTML = '$' + totalAmzFees.toFixed(2); document.getElementById('resLandedCost').innerHTML = '$' + totalLandedCost.toFixed(2); var profitEl = document.getElementById('resNetProfit'); profitEl.innerHTML = '$' + netProfit.toFixed(2); profitEl.className = netProfit >= 0 ? 'fba-result-value text-success' : 'fba-result-value text-danger'; var marginEl = document.getElementById('resMargin'); marginEl.innerHTML = margin.toFixed(2) + '%'; marginEl.className = margin >= 20 ? 'fba-result-value text-success' : (margin >= 0 ? 'fba-result-value' : 'fba-result-value text-danger'); document.getElementById('resROI').innerHTML = roi.toFixed(2) + '%'; }

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