HVAC Load Calculator

About This Tool

Our HVAC Load Calculator is a comprehensive online tool designed to assist HVAC professionals, engineers, and building managers in estimating the heating and cooling requirements of any building. By inputting key parameters such as building size, insulation, window areas, occupancy, and climate zone, users receive precise load calculations essential for efficient system design.

The calculator supports both imperial and metric units, providing flexibility for global users. Its intuitive interface guides users through each step, ensuring accurate input collection. The core calculation uses established thermal load formulas, considering internal gains, external weather conditions, and ventilation needs.

This tool saves time and reduces errors compared to manual calculations, enabling better decision-making in HVAC planning, energy efficiency assessments, and retrofitting projects. Advanced features include region-specific climate adjustments, detailed breakdowns, and export options for documentation. Whether you're designing new systems or troubleshooting existing ones, this calculator offers reliable insights to optimize HVAC performance.

Sign in to see all your usage