Not sure if this is useful, but here is a bash function I found a while back that comes in handy for me from time to time. This is just a snippet I found. It could be improved upon in a few ways.

    function temp()
    {
    # Shell script to convert Fahrenheit to Celsius Temperature or Celsius 
    # to Fahrenheit Temperature
    # -------------------------------------------------------------------------
    # Copyright (c) 2005 nixCraft project <http://cyberciti.biz/fb/>
    # This script is licensed under GNU GPL version 2.0 or above
    # -------------------------------------------------------------------------
    # This script is part of nixCraft shell script collection (NSSC)
    # Visit http://bash.cyberciti.biz/ for more information.
    # -------------------------------------------------------------------------
    # Fahrenheit and Celsius Temperature Scales more info:
    # http://en.wikipedia.org/wiki/Temperature_conversion_formulas
    # --------------------------------------------------------------------
    echo "*** Converting between the different temperature scales ***"
    echo "1. Convert Celsius temperature into Fahrenheit"
    echo "2. Convert Fahrenheit temperatures into Celsius"
    echo -n "Select your choice (1-2) : "
    read choice
     
    if [ $choice -eq 1 ]
    then
     echo -n "Enter temperature (C) : "
     read tc
     # formula Tf=(9/5)*Tc+32
     tf=$(echo "scale=2;((9/5) * $tc) + 32" |bc)
     echo "$tc C = $tf F"
    elif [ $choice -eq 2 ]
    then
     echo -n "Enter temperature (F) : "
     read tf
     # formula Tc=(5/9)*(Tf-32) 
     tc=$(echo "scale=2;(5/9)*($tf-32)"|bc)
     echo "$tf = $tc"
    else
     echo "Please select 1 or 2 only"
     exit 1
    fi
    
    }