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
Common Box Volume Conversions
| Box Type | Cubic Inches | Cubic Centimeters |
|---|---|---|
| Single Gang (small) | 14.0 cu.in. | 229.4 cm³ |
| Single Gang (standard) | 18.0 cu.in. | 295.0 cm³ |
| Single Gang (deep) | 22.5 cu.in. | 368.7 cm³ |
| 4" Square 1-1/2" | 21.0 cu.in. | 344.1 cm³ |
| 4" Square 2-1/8" | 30.3 cu.in. | 496.5 cm³ |
| 4-11/16" Square 2-1/8" | 42.0 cu.in. | 688.3 cm³ |
| 2-Gang Device | 32.0 cu.in. | 524.4 cm³ |
About Volume Conversions for Electrical Boxes
The National Electrical Code (NEC) specifies box fill requirements in cubic inches. However, some manufacturers and international standards use cubic centimeters. This converter helps electricians quickly convert between these units when working with box fill calculations.
When to Use This Converter
- Converting metric box specifications to NEC-standard units
- Working with imported electrical boxes with metric markings
- Calculating custom box volumes from metric dimensions
- Verifying manufacturer specifications against NEC requirements
Related Tools
Use our box fill calculator to determine if your electrical box meets NEC 314.16 requirements after converting volumes.