How to Calculate Heat Transfer Rate

Heat Transfer Rate Calculator

This calculator helps you determine the rate at which heat energy is transferred through a material or across a boundary. Understanding heat transfer is crucial in fields like thermodynamics, engineering, and building science.

W/(m²·K)
K or °C

Result:

function calculateHeatTransferRate() { var U = parseFloat(document.getElementById("heatTransferCoefficient").value); var A = parseFloat(document.getElementById("surfaceArea").value); var deltaT = parseFloat(document.getElementById("temperatureDifference").value); var resultElement = document.getElementById("result"); if (isNaN(U) || isNaN(A) || isNaN(deltaT)) { resultElement.textContent = "Please enter valid numbers for all fields."; return; } // Formula for Heat Transfer Rate (Q_dot) = U * A * ΔT var heatTransferRate = U * A * deltaT; resultElement.textContent = heatTransferRate.toFixed(2) + " Watts (W)"; } .calculator-container { font-family: Arial, sans-serif; border: 1px solid #ccc; padding: 20px; border-radius: 8px; max-width: 500px; margin: 20px auto; background-color: #f9f9f9; } .calculator-container h2 { text-align: center; color: #333; margin-bottom: 15px; } .calculator-container p { text-align: justify; color: #555; line-height: 1.6; margin-bottom: 20px; } .input-section { margin-bottom: 15px; display: flex; align-items: center; gap: 10px; } .input-section label { display: block; margin-bottom: 5px; font-weight: bold; color: #444; flex-basis: 40%; text-align: right; } .input-section input { padding: 8px; border: 1px solid #ccc; border-radius: 4px; flex-basis: 30%; } .input-section span { font-size: 0.9em; color: #777; } button { display: block; width: 100%; padding: 10px 15px; background-color: #4CAF50; color: white; border: none; border-radius: 4px; cursor: pointer; font-size: 1.1em; transition: background-color 0.3s ease; } button:hover { background-color: #45a049; } .result-section { margin-top: 20px; text-align: center; border-top: 1px solid #eee; padding-top: 15px; } .result-section h3 { color: #333; margin-bottom: 10px; } #result { font-size: 1.3em; color: #007bff; font-weight: bold; }

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