AC, Heat Pumps & Refrigeration Calculators

Calculate refrigerant superheat from suction line temperature and saturated suction temperature, in °F and K.

Calculate liquid-line subcooling from saturated condensing temperature and liquid line temperature.

Calculate compressor compression ratio from suction and discharge gauge pressures converted to absolute pressure.

Calculate refrigeration capacity from refrigerant mass flow and evaporator enthalpy change, in kW, BTU/h and tons.

Calculate evaporator TD — the difference between entering air temperature and saturated evaporator temperature.

Calculate condenser split: saturated condensing temperature minus outdoor ambient temperature.

Calculate refrigerant velocity in a line from mass flow, density and inside diameter.

Calculate heat pump coefficient of performance from heat output and electrical input, with equivalent EER.

Compare heat pump heating cost against electric resistance heat using seasonal heat demand, average COP and your electricity rate.

Calculate current draw and BTU/h output of heat pump electric backup heat strips from kW and voltage.

Refrigerant Pressure–Temperature Chart — coming soon to Welcome to HVAC once verified reference data is in place.

Refrigerant Pipe Sizing Reference — coming soon to Welcome to HVAC once verified reference data is in place.