All lengths are calculated in a base unit, then converted. Reel count is ceil (Total ÷ ReelSize), and the rounded order length equals Reels × ReelSize. Choose your unit and keep it consistent. Set routing slack to cover bends and alignment. The following formulas may be used to determine general guidelines for installing Corning Optical Communications' fiber optic cable; however, refer to the cable specification sheet for the listed minimum bend radius: NOTE: Corning® RocketRibbonTM extreme-density cable (1728- and 3456-fiber) exceeds. Whether you're installing Cat6 cables in your home or deploying fiber optic cable in a commercial space, using a cable length calculator ensures that you purchase just the right amount of cable. This helps reduce waste, manage costs, and achieve a clean, efficient installation. A cable length. This is a surprisingly complex topic, as it depends on what you're trying to calculate and what kind of fiber you're dealing with. Here's a comprehensive overview, covering different scenarios and methods. Understanding Fiber Length: Key Concepts Nominal Length:. In this blog, I will discuss the fiber optic cable distance, the effect factors, how to choose the right fiber optic cables, and how to compare the transmission distances of single-mode and multimode fiber optic cables.