NEC Box Fill Calculator

Calculate electrical box fill requirements per NEC Article 314.16.

Count of 14 AWG conductors.
Count of 12 AWG conductors.
Count of 10 AWG conductors.
Number of internal clamps (counts as 1 conductor of largest).
Each yoke/strap counts as 2 conductors of largest.
1 if any grounds present (counts as 1 conductor of largest).

Results

Required Volume-in³
Equivalent Conductor Count-
Recommended Box-
References: NEC Article 314.16; NEC Table 314.16(A); NEC Table 314.16(B)