How to measure size of entered text?

import java.io.*;
class Meas
{
  public static void main( String arg[]) throws IOException
  {
    BufferedReader userInput = new BufferedReader (new InputStreamReader(System.in));
    System.out.println("Enter PlainText:");
    String s = userInput.readLine();

    double bytes = s.length();
    double kilobytes = (bytes / 1024);
    double megabytes = (kilobytes / 1024);
    double gigabytes = (megabytes / 1024);
    double terabytes = (gigabytes / 1024);
    double petabytes = (terabytes / 1024);
    double exabytes = (petabytes / 1024);
    double zettabytes = (exabytes / 1024);
    double yottabytes = (zettabytes / 1024);

    System.out.println("bytes : " + bytes);
    System.out.println("kilobytes : " + kilobytes);
    System.out.println("megabytes : " + megabytes);
    System.out.println("gigabytes : " + gigabytes);
    System.out.println("terabytes : " + terabytes);
    System.out.println("petabytes : " + petabytes);
    System.out.println("exabytes : " + exabytes);
    System.out.println("zettabytes : " + zettabytes);
    System.out.println("yottabytes : " + yottabytes);
  }
}

Enter PlainText:
That's all folks!
bytes : 17.0
kilobytes : 0.0166015625
megabytes : 1.621246337890625E-5
gigabytes : 1.5832483768463135E-8
terabytes : 1.546140993013978E-11
petabytes : 1.509903313490213E-14
exabytes : 1.474514954580286E-17
zettabytes : 1.4399560103323106E-20
yottabytes : 1.406207041340147E-23

import java.io.*;
class Meas
{
  public static void main(String arg[]) throws IOException
  {
    String desc[] = new String [] { "bytes", "kilobytes", "megabytes", "gigabytes", "terabytes", "petabytes", "exabytes", "zettabytes", "yottabytes"};

    BufferedReader userInput = new BufferedReader (new InputStreamReader(System.in));
    System.out.println("Enter PlainText:");
    String s = userInput.readLine();

    double len = s.length();

    for (String d : desc)
    {
      System.out.println( d + " : " + len);
      len /= 1024;
    }
  }
}