Volume Converter
Convert between cubic inches (cu.in.) and cubic centimeters (cm3) for electrical box volume calculations.
Standard unit for NEC box fill calculations
Metric equivalent (1 cu.in. = 16.387 cm3)
Conversion Formula: 1 cubic inch = 16.387064 cubic centimeters: 1 cubic inch = 16.387064 cubic centimeters
Common Box Volume Conversions
| Box Type | Cubic Inches (cu.in.) | Cubic Centimeters (cm3) |
|---|---|---|
| Single Gang (small) | 14.0 cu.in. | 229.4 cm\u00B3 |
| Single Gang (standard) | 18.0 cu.in. | 295.0 cm\u00B3 |
| Single Gang (deep) | 22.5 cu.in. | 368.7 cm\u00B3 |
| 4" Square 1-1/2" | 21.0 cu.in. | 344.1 cm\u00B3 |
| 4" Square 2-1/8" | 30.3 cu.in. | 496.5 cm\u00B3 |
| 4-11/16" Square 2-1/8" | 42.0 cu.in. | 688.3 cm\u00B3 |
| 2-Gang Device | 32.0 cu.in. | 524.4 cm\u00B3 |