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Entropy Change Calculator

Compute the entropy change of a substance undergoing a constant-pressure heating or cooling process. Used in thermodynamics courses and engineering analyses of heat exchangers, turbines, and compressors.

Mass (kg)

Specific Heat Capacity (J/kg·K)

Initial Temperature (K)

Final Temperature (K)

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

	Entropy Change Calculator	Heat Pump COP Calculator
Category	Thermodynamics	Thermodynamics
Inputs required	4	4
Result	Entropy Change (J/K)	Heat Pump COP
What it does	Compute the entropy change of a substance undergoing a constant-pressure heating or cooling process. Used in thermodynamics courses and engineering analyses of heat exchangers, turbines, and compressors.	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.