# Degrees of Curvature

US railroads use an old measurement for the curve radius, which has made a lot of sense for practical work in the days before electronically-controlled track maintenance machinery: degrees of curvature. A conversion table is given here.

curve radius | curve radius | degrees of curvature |
---|---|---|

100 m | 328 feet | 17 degrees 32 minutes |

150 m | 492 feet | 11 degrees 40 minutes |

200 m | 656 feet | 8 degrees 45 minutes 30 seconds |

250 m | 820 feet | 6 degrees 59 minutes |

300 m | 984 feet | 5 degrees 49 minutes 30 seconds |

350 m | 1148 feet | 4 degrees 59 minutes 30 seconds |

400 m | 1312 feet | 4 degrees 22 minutes |

450 m | 1476 feet | 3 degrees 53 minutes |

500 m | 1640 feet | 3 degrees 30 minutes |

550 m | 1804 feet | 3 degrees 10 minutes 30 seconds |

600 m | 1968 feet | 2 degrees 55 minutes |

650 m | 2133 feet | 2 degrees 41 minutes |

700 m | 2297 feet | 2 degrees 30 minutes |

750 m | 2461 feet | 2 degrees 19 minutes |

800 m | 2625 feet | 2 degrees 11 minutes |

850 m | 2789 feet | 2 degrees 3 minutes |

900 m | 2953 feet | 1 degrees 57 minutes 30 seconds |

950 m | 3117 feet | 1 degrees 50 minutes |

1000 m | 3281 feet | 1 degrees 45 minutes |

In the main text, curve radius is given in feet, with a conversion to meter and degrees in the page footer.