Box Fill Calculator

Conductors excluding ground, internal clamps are tabs that hold wires.

https://www.omnicalculator.com/construction/box-fill

• Results - 14 ga 3 2-conductor wires 1 device - 20 cu in
• 12 ga 3 wires 1 device - 22.5 cu in
• 12 ga outlet - 2 2-conductor wires 1 device - 18 cu in
• 14 ga outlet - 2 2-conductor wires 1 device - 16 cu in
• 3 light switches in a triple box - one 14 ga feed line, 3 separate lines going out - 41.4