The    
tables below give you a guide for converting your specimen test results into    
Band scores. In the real tests, each test has its own unique conversion table    
because there are sometimes slight differences between tests. The tables below    
are the approximate raw scores needed for each Band score. 
You    
should consider that these tables are quite accurate for: a) the IELTS    
Specimen Tests that are published by the same people who produce the real    
IELTS tests and, b) The Cambridge IELTS Practice Tests. For any other    
specimen tests, these figures would be much less accurate because the tests    
themselves vary in how well they accurately represent real IELTS tests. 
There    
are two sets of figures for each test, for example, Band 4 for listening    
represents these raw test scores: ※10 每 16     
(or 10 每 15)§. The left-hand numbers are from one person who claims    
to know the conversion numbers and the right-hand numbers are from another    
person. I have no idea which of these two people is the more accurate. The    
sources of this information are at the bottom of this page. 
In those cases where the test has less than or more than 40 questions, these tables will be somewhat inaccurate.
You can also see a similar table on the official IELTS website, www.ielts.org, HERE.
| RAW   
      SCORE | BAND SCORE | 
| 1 | 1 | 
| 2每3 | 2 | 
| 4每9 | 3 | 
| 10每16   
      (or 10每15) | 4 | 
| 17每24  
      (or 16每22) | 5 | 
| 25每32  
      (or 23每29) | 6 | 
| 33每37  
      (or 30每34) | 7 | 
| 38每39  
      (or 35每38) | 8 | 
| 40     
         (or 39每40) | 9 | 
 
| RAW   
      SCORE | BAND SCORE | 
| 1 | 1 | 
| 2每3 | 2 | 
| 4每9 | 3 | 
| 10每15   
      (or 10每14) | 4 | 
| 16每22  
      (or 15每22) | 5 | 
| 23每28  
      (or 23每29) | 6 | 
| 29每35  
      (or 30每34) | 7 | 
| 36每39  
      (or 35每38) | 8 | 
| 40      
        (or 39每40) | 9 | 
﹛
| RAW   
      SCORE | BAND  
      SCORE | 
| 1每2       
      (or 1) | 1 | 
| 3每5      
      (or 2每7) | 2 | 
| 6每11    
      (or 8每14) | 3 | 
| 12每17  
      (or 15每22) | 4 | 
| 18每25  
      (or 23每29) | 5 | 
| 26每34  
      (or 30每33) | 6 | 
| 35每37  
      (or 34每37) | 7 | 
| 38每39    
       | 8 | 
| 40 | 9 | 
http://www.aippg.net/forum/viewtopic.php?t=10502&highlight=table+change+results+band+score
-----------------------------------------------------------------------------------------------------------
Source 
of the right-hand-side numbers (called ※or§)
http://www.aippg.net/forum/viewtopic.php?t=50909
 
This person has a handy conversion calculator here:
http://www.ielts-blog.com/Calculate-Ielts-Result-Reading-Listening-Band-Score.html
 
-----------------------------------------------------------------------------------------------------------