Conduit Fill Calculator
Select a conduit, add one or more cables, and choose a fill method. New here? Read the quick guide.
Project details (optional)Optional details for PDF and CSV reportsAdd details
Calculator Inputs
Conduits
Select the raceway type and trade size for this calculation.
Conduit 1EMT 1/2"Edit
Cables
Add one row for each cable type in the conduit.
Cable 1Select cable detailsSelect cable
Fill criteria
Choose the permitted fill limit used for the calculation.
Bends and pulling allowance0° entered — no bend reductionConfigure
NEC conduit-fill percentages do not change based on the number of bends. Select an optional manufacturer/project method only when required by the cable manufacturer, project specification, or authority having jurisdiction.
Calculation Results
Select a cable to begin
Choose a manufacturer and cable product, or select Custom round cable to enter an outside diameter.
Export this calculation
Create a field-ready record containing the inputs, detailed results, conduit plan, calculation formulas, and verification notes.
Correct the calculator inputs before exporting or sharing.
- Select a cable to begin.