Calculator directory
Each calculator uses the same conduit dimensions, cable library, and fill mathematics, but starts with a different design question.
Will this cable load fit in the conduit I selected?
Choose one or more conduits, add mixed cable types and quantities, and verify the calculated fill against the selected criterion.
What conduit sizes are required for this cable load?
Start with the cables. The calculator recommends the smallest single conduit or a minimum-count multi-conduit plan.
How many of this cable fit in a selected conduit?
Select one conduit and one manufacturer cable product—or enter a custom diameter—to calculate identical-cable capacity.
Quick choice
Known conduit: use Conduit Fill to verify a complete load, or Cable Capacity for one repeated cable type.
Known cable load: use Conduit Size to determine the raceway sizes and quantities required.