Result
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📝 Step-by-step solution
Select what to calculate and enter values
💡 Q = heat flow (W) | k = thermal conductivity (W/m·K) | A = area (m²) | ΔT = temp diff | L = thickness (m)
📖 How to Use This Heat Transfer Calculator
1
Select what to calculate - Heat Flow (Q), Conductivity (k), Area (A), ΔT, or Thickness (L).
2
Enter known values - Fill in the required fields for your calculation.
3
Click "Calculate" - Get step-by-step solution.
🔥 Fourier's Law of Heat Conduction
Fourier's law: Q = k × A × ΔT / L - heat flow through a material.
📊 Heat Transfer Formulas
Heat Flow: Q = k × A × ΔT / L
Conductivity: k = Q × L / (A × ΔT)
Area: A = Q × L / (k × ΔT)
ΔT: ΔT = Q × L / (k × A)
Thickness: L = k × A × ΔT / Q
🔬 Common Thermal Conductivity Values
- Copper: 401 W/m·K
- Aluminum: 237 W/m·K
- Steel: 43-58 W/m·K
- Glass: 0.8-1.0 W/m·K
- Water: 0.6 W/m·K
- Wood: 0.1-0.2 W/m·K
- Air: 0.026 W/m·K
❓ Frequently Asked Questions
What are the three modes of heat transfer?
Conduction (solids), Convection (fluids), and Radiation (electromagnetic).
What is thermal conductivity?
Thermal conductivity (k) is a material property indicating how well it conducts heat.
Does temperature difference use Celsius or Kelvin?
Both work because ΔT is the same in Celsius and Kelvin.