Need to know how many cables fit in a conduit — or what size conduit you need for your next run? This calculator takes the guesswork out of conduit fill. Whether you're working with Cat6, fiber, coax, or control cable, just select your cable type and raceway, and we’ll do the math.
We’ve preloaded the tool with accurate cable diameters and NEC-recommended fill rates (40% for most raceways, 100% for sleeves like STI). You can also enter custom OD values if you’re working with specialty cables.
Use the first tool to calculate how many cables will fit in your chosen conduit.
Use the second tool to find the minimum conduit size required for your bundle.
No more flipping through charts — just fast, reliable results built for low voltage pros.