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Both calculators run independently — change the inputs on either side to compare results.

Heat Transfer Rate Calculator

Calculate the steady-state rate of heat conduction through a flat material using Fourier's Law. Useful for sizing insulation, designing walls, and analyzing thermal resistance in building and mechanical engineering.

Thermal Conductivity (W/m·K)

Area (m²)

Temperature Difference (K)

Material Thickness (m)

Fill in the required fields to see your result.

Thermodynamics

Convective Heat Transfer Calculator

Calculates the rate of convective heat transfer between a solid surface and a surrounding fluid using Newton's Law of Cooling. Use it in HVAC design, electronics cooling, and heat exchanger sizing.

Heat Transfer Coefficient (W/(m²·K))

Surface Area (m²)

Surface Temperature (°C)

Fluid Temperature (°C)

Fill in the required fields to see your result.

Key differences

	Heat Transfer Rate Calculator	Convective Heat Transfer Calculator
Category	Thermodynamics	Thermodynamics
Inputs required	4	4
Result	Heat Transfer Rate (W)	Heat Transfer Rate (W)
What it does	Calculate the steady-state rate of heat conduction through a flat material using Fourier's Law. Useful for sizing insulation, designing walls, and analyzing thermal resistance in building and mechanical engineering.	Calculates the rate of convective heat transfer between a solid surface and a surrounding fluid using Newton's Law of Cooling. Use it in HVAC design, electronics cooling, and heat exchanger sizing.