About HVAC Toolkit
Professional tools and resources for HVAC technicians
Our Mission
HVAC Toolkit was created to provide HVAC technicians and engineers with free, reliable, and easy-to-use tools for their daily work. We understand that time is critical in the field, which is why all our calculators and reference materials are designed for quick access and accurate results.
Professional Calculators
Accurate calculations for tonnage conversion, refrigerant charge, electrical load, pipe sizing, and subcooling/superheat analysis.
Technical References
Comprehensive P-T charts for 8 common refrigerants, including zeotropic blends with dew and bubble points.
Equipment Database
Searchable compressor specifications from major brands including Kulthorn, Copeland, Danfoss, Panasonic, and GMCC.
Troubleshooting Guide
Interactive diagnostic flowchart to help identify and resolve common HVAC problems quickly and efficiently.
Supported Refrigerants
Supported Pressure Units
Questions or Feedback?
We're always looking to improve our tools and add new features. Let us know what would help you in your work.
Contact Us