About HVAC Calculator Tools

HVAC Calculator Tools provides free preliminary sizing calculators for practical heating, cooling, ductwork, hydronic piping, pumps, radiators, and pipe insulation tasks.

The site is built for engineers, contractors, installers, and building professionals who need quick early-stage estimates. The calculators use transparent engineering formulas and standard-specific assumptions where applicable.

These tools are not a replacement for project specifications, local code requirements, or professional engineering review. Always verify final designs with qualified professionals and manufacturer data.