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Fill Ratio Calculation Worksheet

This worksheet will allow you to calculate the fill ratio using one, two, or three cables within the conduit. If you only have one cable for your conduit, please use only the first cable diameter field.

Number of Cables:
Diameter of First Cable: in
Diameter of Second Cable: in
Diameter of Third Cable: in
Conduit / Innerduct Diameter: in
Your Fill Ratio Is:

This calculator is designed to estimate fill ratio for fiber optic cables installed in ducts. Fill ratio is one of many variables that must be considered when planning fiber optic cable installations. Corning Optical Communications assumes no liability for damages that result from using these calculations to design telecommunications systems. Corning Optical Communications can provide more detailed analysis of proposed duct installations upon request.