Free HVAC Tools & Calculators
Powerful, easy-to-use tools for homeowners and HVAC professionals. Get accurate results in seconds.
BTU Calculator
Calculate the heating or cooling capacity required for any room.
HVAC Cost Estimator
Estimate installation or replacement costs for your HVAC system.
Duct Size Calculator
Determine the correct duct dimensions based on airflow (CFM).
Temperature Converter
Convert Fahrenheit, Celsius and Kelvin instantly.
Practical tools for better HVAC decisions.
Whether you're sizing a system, estimating project costs, checking duct dimensions, or converting temperatures, HVAC Senior gives you quick answers without the guesswork.