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

Heat Conduction Calculator

Calculate the steady-state heat transfer rate through a flat wall, cylindrical pipe, or spherical shell using Fourier's law. Used by engineers sizing insulation, heat exchangers, and building envelopes.

Thermal Conductivity (W/(m·K))

Temperature Difference (K)

Wall Thickness / Length (m)

Heat Transfer Area (m²)

Geometry Type

Fill in the required fields to see your result.

Thermodynamics

Heat Pump COP Calculator

Calculate a heat pump's coefficient of performance (COP) from its heating capacity and power draw, with optional correction for defrost-cycle losses below 7 °C. Used to compare heat pump models and assess seasonal energy costs.

Outdoor Temperature (°C)

Heating Capacity (BTU/h)

Power Consumption (W)

Include Defrost Losses

Fill in the required fields to see your result.

Key differences

	Heat Conduction Calculator	Heat Pump COP Calculator
Category	Thermodynamics	Thermodynamics
Inputs required	5	4
Result	Heat Transfer Rate (W)	Heat Pump COP
What it does	Calculate the steady-state heat transfer rate through a flat wall, cylindrical pipe, or spherical shell using Fourier's law. Used by engineers sizing insulation, heat exchangers, and building envelopes.	Calculate a heat pump's coefficient of performance (COP) from its heating capacity and power draw, with optional correction for defrost-cycle losses below 7 °C. Used to compare heat pump models and assess seasonal energy costs.