Converting AFV Stats. Between Different Wargames Rules

Quick Conversion Tables

Armour

Rapidfire  Challenger 2000  Firefly  Command Decsion   WRG    mm (aprox.)
   IV           18-20          -           60         XI-XII   525
  III           16-17          -           50           X      450
   II           13-15          -           40          IV      375
    I            9-12          -           30        VII-VIII  300
    A            7-8         13-20         20          VI      200
    B            5-6          8-12         15           V      125
    C            3-4          6-7          10        III-IV     75
    D             2           3-5           5          II       55
    E            0-1          0-2           2           I       20
    F            SOFT VEHICLE

Guns

  
Rapidfire Challenger 2000  Firefly  Command Decsion   WRG
           KE    Chemical            KE   Chemical   KE       Chemical
                                                   (`K' at)    (`3' ar)
   -4      27+      45+       -      71+     x10   over VIII   over X
   -3     22-26    36-44      -     56-70    x9      VIII         X
   -2     17-21    28-35      -     41-55    x8       VII        IX
   -1     14-16    23-27      -     31-40    x7       VI        VIII
    0     12-13    20-22      -     21-30    x6        V         VII
    1      9-11    15-19    18-22   11-20    x5      V-IV        VI
    2      7-8     12-14    14-17    7-10    x4       IV          V
    3       6      10-11    11-13    3-6     x3       III        IV
    4       5       8-9      9-10    1-2     x2       II         III
    5      1-4      1-7      1-8      0-     x1        I        I-II

Armour Conversion to Command Decision

Command Decision  Challenger 2000  Firefly  WRG  Rapidfire
      65              20              -     XII     IV
      60              19              -     XII     IV 
      55              18              -      XI     IV  
      50              17              -       X    III   
      45              16              -       X    III    
      40              15              -      IX     II
      37              14              -      IX     II 
      35              13              -      IX     II  
      30              12              -    VIII      I   
      27              11              -    VIII      I    
      25              10              -     VII      I     
      22               9              -     VII      I      
      20               8             20      VI      A       
      17               7             16      VI      A        
      15               6             12       V      B
      12               5             10       V      B
      10               4              7      IV      C      
       7               3              6     III      C      
       5               2              5      II      D
       2               1              2       I      E
       1               0             0-1      I      E