About the Cooling Calculators
Cooling calculators help HVAC engineers size and evaluate air conditioning and refrigeration equipment. This collection covers sensible and total cooling load estimates, SEER and EER efficiency conversions, evaporative cooling performance analysis, and DX coil capacity calculations. Use them during design to verify that proposed equipment can meet the cooling demand for a given space, or during commissioning to confirm that measured performance matches the design intent. Each calculator applies standard industry formulas so results are consistent with manufacturer ratings and energy code requirements. Whether you are selecting a rooftop unit, evaluating an evaporative pre-cooler, or comparing efficiency ratings across equipment options, these tools provide the quick answers engineers need on the job site or at the desk.
BTU/Hr to Tons Conversion
Convert between BTU/Hr and refrigeration tons.
Cooling Density Factor
Calculate altitude density correction factor for cooling.
SEER Calculator
Calculate SEER rating or cooling cost from capacity and power input.
Cost of Cooling
Estimate annual electricity cost for a cooling system based on capacity, SEER, run hours, and utility rate.
Evaporative Cooling Calculator
Calculate evaporative cooling performance including leaving conditions and efficiency.
Cooling Load Calculator
Calculate sensible, latent, and total cooling loads from a single A→B process — airflow and entering/leaving air conditions. Automatically corrects for altitude.
Required Airflow Calculator
Calculate and compare Paragon HVAC airflow against a traditional RTU.