Airside
Duct sizing calculator
Size round duct by airflow and friction rate, check existing round or rectangular duct, and compare practical rectangular equivalents.
Open duct calculatorTools
Field tools. No account. No telemetry.
Fast browser calculators for early sizing and shop or field layout. Inputs stay in your browser. Results still require project-specific criteria and professional verification.
Layout
Field offset calculator
Lay out two-elbow offsets or solve the bend angle, centerline radius, and straight spool required to fit a known run.
Open offset calculator