Online Tools
HVAC Calculation Tools
9 free online calculation tools for quick AC tonnage estimation, unit conversion, dew point calculation, electricity cost estimation, and more.
AC Tonnage Calculator
Enter floor area, usage type, floor level, and orientation to quickly estimate required AC tonnage, BTU, and kW.
Start CalculatingBTU / kW / RT Converter
Instantly convert between BTU/hr, kW, kcal/hr, and refrigeration tons (RT) — common HVAC units.
Start CalculatingAir Change Rate Calculator
Calculate required airflow (CMH / CMM / CFM) based on room dimensions and air change rate requirements.
Start CalculatingDew Point Calculator
Enter dry-bulb temperature and relative humidity to calculate dew point temperature and absolute humidity.
Start CalculatingEER / COP / SEER Converter
Convert between HVAC energy efficiency ratings: EER, COP, SEER, CSPF, and Taiwan energy efficiency ratings.
Start CalculatingCold Storage Sizing
Estimate cold storage floor area, refrigeration load, and energy consumption based on product type, volume, and target temperature.
Start CalculatingDuct Sizing Calculator
Enter airflow and velocity to calculate circular duct diameter and recommended rectangular duct dimensions.
Start CalculatingElectricity Cost Estimator
Enter AC power rating and usage hours to estimate monthly and annual electricity costs based on Taiwan power rates.
Start CalculatingPipe Sizing Calculator
Enter flow rate and velocity to calculate the required pipe diameter for chilled water, condenser water, or refrigerant lines.
Start CalculatingProfessional Consultation
Need Professional HVAC Engineering?
Online tools provide preliminary estimates for reference. Actual engineering design requires consideration of many additional professional factors. Contact our engineering team for precise HVAC system planning.