Cable Tray Fill Calculator

Check how full your cable tray is. Enter your tray size and cable list. Each cable size gets its own row, so you can mix quantities and diameters (e.g. 2 cables at 1″ and 3 at 4″).

Calculate Tray Fill

How this is calculated

This calculator provides a sizing estimate and is intended as an engineering aid, not a final design document. Ampacity derating (NEC 392.80), circuit grouping (392.20), tray depth limits, and project-specific conditions must still be verified.