HVAC Tools
HVAC Calculators
Practical tools for preliminary HVAC sizing, efficiency, energy use, airflow, and equipment research. HVACBird calculators explain their assumptions instead of hiding the math.
BTU Cooling Load Estimator
Estimate a preliminary cooling load from room and building inputs, with a visible breakdown of each adjustment.
Open calculator →
BTU/hr ↔ Tons Converter
Convert HVAC capacity between BTU per hour and nominal refrigeration tons.
Open calculator →
SEER2 Energy & Cost Estimator
Estimate seasonal cooling electricity use and cost from capacity, SEER2, equivalent full-load hours, and utility rate.
Open calculator →
Heating Cost Comparison
Compare heat pump, electric resistance, and gas furnace operating costs using your utility rates, COP, AFUE, and delivered heat requirement.
Open calculator →