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Conduit Fill Calculator
NEC Chapter 9 conduit fill percentage for mixed wire gauges and conduit types
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Conduit
THHN/THWN Conductors
qty
0.0399 in²Fill Results
EMT 3/4" Fill
7.5%
Max allowed: 40% (3+ conductors)
0%40% limit100%
Wire Area Used
0.0399 in²
Allowed Area
0.2132 in²
Remaining
0.1733 in²
✓ Pass — 0.1733 in² remaining capacity
NEC Chapter 9 Fill Rules
1 conductor53% of conduit area
2 conductors31% of conduit area
3 or more conductors40% of conduit area
Wire areas based on NEC Chapter 9, Table 5 (THHN/THWN-2). Conduit areas from Table 4.
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