The app will calculate the conduit fill percentages and jam probability for multiple conductors per NEC® Guidelines. Simply enter the conduit type and size, then specify your conductors.

Welcome to the Conduit Fill Calculator website. We hope to provide you with the best online conduit fill calculator, as well as all relevant information regarding conduits, conduit fill, conduit accessories, and …

Calculate conduit fill percentage for multiple wire sizes, Cat6, Romex, and THHN. Instantly check NEC compliance, jam ratio, and capacity for EMT, PVC, and Rigid.

Our online tool helps electricians, engineers and contractors calculate the right size conduit, fill percentages and jam probability per NEC guidelines.

Calculate EMT, PVC, and RMC conduit fill percentages instantly according to NEC standards. Free, accurate, and trusted by over 50,000 electricians, contractors, and engineers worldwide.

Calculate conduit fill percentages and find the right conduit sizing per NEC Chapter 9 requirements. Works with EMT, PVC, and RMC conduits with accurate wire area calculations for safe installations.

Professional NEC Chapter 9 conduit fill calculator implementing Table 1 fill percentages, Table 4 conduit areas, and Table 5 conductor dimensions. Essential for code-compliant raceway sizing and wire …

3 days ago · Wondering how many wires fit in your conduit? Free 2026 NEC conduit fill calculator shows exact capacity for EMT, PVC & RMC. Used by 50,000+ electricians. Avoid failed inspections!

May 31, 2025 · Free, NEC-compliant conduit fill calculator for electricians, low-voltage technicians, estimators, and engineers. Determine how many wires or cables safely fit inside various conduit types.

Southwire's cable tray fill calculator takes the guesswork out of your project. Get accurate results and stay within NEC guidelines.