Box Fill Calculator for Electricians
The most accurate free box fill calculator online. Calculate electrical box fill per NEC 314.16, including conductors, devices, clamps, and grounding. Ensure your installations are safe and code-compliant.
Box Fill Calculator
Calculate electrical box fill requirements per NEC 314.16
Box Volume (cu.in.)
18 cu.in.
Total Fill Required
18.00 cu.in.
Box Capacity
18.00 cu.in.
Remaining Capacity
0.00 cu.in.
Volume Breakdown:
Why Use Our Box Fill Calculator?
The #1 free electrical box fill calculator trusted by electricians worldwide. Our box fill calculator simplifies complex NEC 314.16 calculations.
How the Box Fill Calculator Works
Three simple steps to calculate electrical box fill per NEC 314.16
Select Box Type
Choose from standard electrical box sizes or enter custom dimensions for your box fill calculation.
Add Components
Enter conductors, devices, clamps, and grounding wires for accurate box fill calculation.
Get Box Fill Results
Instantly see if your electrical box meets NEC 314.16 box fill requirements.
Box Fill Calculator FAQ
Ready to Calculate Box Fill?
Ensure your electrical installations meet NEC 314.16 requirements with our free box fill calculator. Trusted by electricians nationwide.
Start Box Fill Calculator