The app will calculate the conduit fill percentages and jam probability for multiple conductors per NEC® Guidelines. Simply enter the conduit type and size, then specify your conductors.

Conduit Fill Table This conduit fill chart is used to determine how many wires can be safely put into non-PVC conduit tubing or pipe.

This electrical conduit size calculator helps electricians, installers, and engineers select the correct conduit diameter based on the number of cables, cable outer diameter, and standard conduit fill ratios.

Our online tool helps electricians, engineers and contractors calculate the right size conduit, fill percentages and jam probability per NEC guidelines.

Jan 28, 2026 · Explore all conduit sizes in our 2026 complete guide. Learn types, measurements, and selection tips to choose the right conduit for every project.

The Construction Monkey Conduit Selector will provide you with the appropriate conduit size based on the number of conductors that you have to install. Make your selections below and the form will …

Master conduit fill calculations with our complete NEC guide including fill charts, wire capacity tables, and step-by-step examples. Learn proper conduit sizing for electrical installations.

Use our Conduit Sizing Calculator to find the right conduit size for your wires. Fast, NEC-compliant, and accurate electrical planning tool.

Need to know what size conduit to run – and how many conductors will fit – without dragging out the NEC® tables? This free conduit sizing tool lets you size electrical conduit in seconds using NEC® …

Our online tool helps electricians, engineers and contractors calculate the right size conduit, fill percentages and jam probability per nec guidelines. It helps ensure compliance with nec guidelines, …