4 x 14 AWG, 40% fill
Number of Conductors: 4; Conductor Size (AWG): 14 AWG; Box Fill Percentage (%): 40
Volume per Conductor (cubic inches): 2; Total Conductor Volume (cubic inches): 8; Required Junction Box Volume (cubic inches): 20
Junction Box Sizing Calculator
Construction0.0(0)
Calculates the minimum required size of a junction box based on the number and size of conductors entering the box.
How To Use
How to use this calculator
Start with your values, or try a preset.
Step 1
Enter Number of Conductors, Conductor Size (AWG), and Box Fill Percentage (%) in the units shown.
Step 2
Read Volume per Conductor (cubic inches), Total Conductor Volume (cubic inches), and Required Junction Box Volume (cubic inches) in the results panel. Results update as you change the inputs.
Step 3
Choose a preset to load an example, then adjust the values for your situation.
Worked Examples
Example calculations
See the inputs and their calculated results.
6 x 12 AWG, 40% fill
Number of Conductors: 6; Conductor Size (AWG): 12 AWG; Box Fill Percentage (%): 40
Volume per Conductor (cubic inches): 2.25; Total Conductor Volume (cubic inches): 13.5; Required Junction Box Volume (cubic inches): 33.75
8 x 10 AWG, 40% fill
Number of Conductors: 8; Conductor Size (AWG): 10 AWG; Box Fill Percentage (%): 40
Volume per Conductor (cubic inches): 2.5; Total Conductor Volume (cubic inches): 20; Required Junction Box Volume (cubic inches): 50
People Also Calculate
Related Calculators
Continue with another tool on a related topic.
Construction
Pallet Calculator
Estimates how many items or boxes fit on a standard pallet or how many pallets are needed for a shipment.
1,776 viewsOpen calculator
Construction
Lighting Calculator
Calculates the number of light bulbs needed to adequately illuminate a room based on its dimensions, desired light level, and bulb specifications.
1,422 viewsOpen calculator
Construction
Inches to Fraction Calculator
Converts a decimal inch measurement into its equivalent fractional representation (inches and fractions of an inch).
1,365 viewsOpen calculator
Construction
Taper Calculator
Calculates the taper length and angle based on the large diameter, small diameter, and taper length.
1,331 viewsOpen calculator