# Hydraulic Radius of a Partially Full Pipe (Less than Half Full)

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## Hydraulic Radius of a Partially Full Pipe (Less than Half Full) formula |
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\(\large{ r_h = \frac { A_c } { P_w } }\) | ||

Symbol |
English |
Metric |

\(\large{ r_h }\) = hydraulic radius | \(\large{ in }\) | \(\large{ mm }\) |

\(\large{ A_c }\) = area cross-section of flow | \(\large{ in^2 }\) | \(\large{ mm^2 }\) |

\(\large{ P_w }\) = wetting perimeter | \(\large{ in }\) | \(\large{ mm }\) |