Conduit Fill Calculator
Validate raceway fill against the 40% rule and Chapter 9 tables.
Result
Total area
0.065 sq in
Allowed area
0.40 sq in
Fill percent
6.5%
Result
Within NEC limits
About this tool
Compute total fill across conductors and equipment grounding. Built to settle jobsite disputes about utility-required 3-inch PVCs and JW exam fill calculations.
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