def GetTRankineFromTFahrenheit(TFahrenheit: float) -> float:
    """
    Utility function to convert temperature to degree Rankine (°R)
    given temperature in degree Fahrenheit (°F).

    Args:
        TRankine: Temperature in degree Fahrenheit (°F)

    Returns:
        Temperature in degree Rankine (°R)

    Notes:
        Exact conversion.

    """
    # Zero degree Fahrenheit (°F) expressed as degree Rankine (°R)
    ZERO_FAHRENHEIT_AS_RANKINE = 459.67

    TRankine = TFahrenheit + ZERO_FAHRENHEIT_AS_RANKINE
    return TRankine