Compare calculators

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

Heat Conduction Calculator

Calculates the steady-state heat transfer rate through a flat material slab using Fourier's law. Useful for sizing insulation, evaluating wall assemblies, or designing heat sinks.

Thermal Conductivity (W/(m·K))

Cross-sectional Area (m²)

Temperature Difference (K)

Material Thickness (m)

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	4	4
Result	Heat Transfer Rate (W)	Heat Pump COP
What it does	Calculates the steady-state heat transfer rate through a flat material slab using Fourier's law. Useful for sizing insulation, evaluating wall assemblies, or designing heat sinks.	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.