HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery .outerHeight stack sum</title>
  <style>
    body { font-family: sans-serif; padding: 16px; max-width: 360px; }
    .card {
      padding: 12px;
      margin: 8px 0;
      border: 2px solid #64748b;
      background: #f8fafc;
    }
    .card:nth-child(2) { padding: 20px; border-width: 4px; }
    #total { margin-top: 12px; font-weight: bold; color: #0f766e; }
  </style>
</head>
<body>
  <div class="card">Card A</div>
  <div class="card">Card B (more padding)</div>
  <div class="card">Card C</div>
  <p id="total"></p>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    var sum = 0;
    $(".card").each(function() {
      sum += $(this).outerHeight(true);
    });
    $("#total").text("Total vertical space (outerHeight with margin): " + sum + "px");
  </script>
</body>
</html>

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jQuery .outerHeight() — sum card stack height (Try It)