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DIMENSION AND WEIGHT CONVERSION CHART
Size Nos / kg Weight of 1000
balls in kg.
  Size Nos / kg Weight of 1000
balls in kg.
Inch mm Inch mm
    1.500 72124 0.015  3/4" 19.05 35.00 28.571
1/16"   1.5875 60843 0.016 25/32" 19.844 31.00 32.258
5/64"   1.9844 31500 0.032   20.000 30.50 32.787
    2.000 30427 0.033 13/16" 20.638 28.00 35.714
3/32"   2.381 18058 0.055   21.000 26.00 38.462
    2.500 15612 0.064 27/32" 21.431 25.00 40.000
7/64"   2.778 11478 0.087   22.000 23.00 43.478
    3.000 9035 0.111 7/8" 22.225 22.00 45.455
1/8"   3.175 7622 0.131   23.000 20.00 50.000
    3.500 5689 0.176 29/32" 23.019 20.00 50.000
5/32"   3.969 3902 0.256 15/16" 23.813 18.00 55.556
    4.000 3811 0.262   24.000 17.64 56.689
    4.500 2677 0.374 31/32" 24.606 16.37 61.087
3/16"   4.763 2258 0.443   25.000 15.61 64.061
    5.000 1951 0.513 1" 25.400 14.88 67.204
7/32"   5.556 1422 0.703   26.000 13.88 72.046
15/64"   5.953 1155 0.866 1 - 1/16" 26.988 12.41 80.580
    6.000 1129 0.886   28.000 11.11 90.009
1/4"   6.350   953 1.049 1 - 1/8" 28.575 10.45 95.694
17/64"   6.747   794 1.259   30.000 9.03 110.742
    7.000   711 1.406 1 - 3/16" 30.163 8.89 112.486
9/32"   7.144   669 1.495 1 - 1/4" 31.750   7.62 131.234  
5/16"   7.938   487 2.053   32.000   7.44 134.409  
    8.000   476 2.101 1 - 5/16" 33.338   6.58 151.976  
11/32"   8.731   366 2.732   34.000   6.20 161.29  
    9.000   334 2.994 1 - 3/8" 34.925   5.72 174.825  
3/8"   9.525   282 3.546   35.000   5.68 176.056  
    10.000   243 4.115   36.000   5.22 191.571  
13/32" 10.319   222 4.505 1 - 7/16" 36.513  5.01 199.601  
  11.000   183 5.464   38.000   4.44 225.225  
7/16" 11.113   177 5.650 1 - 1/2" 38.100   4.41 226.757  
29/64" 11.509   160 6.250 1.9/16" 39.688   3.900 256.410
15/32" 11.906   144 6.944   40.000   3.810 262.467
  12.000   141 7.092 1.5/8" 41.275   3.470 288.184
31/64" 12.303   131 7.634 1.11/16" 42.863   3.100 322.581
1/2" 12.700   119 8.403 1.3/4" 44.450   2.780 359.712
  13.000   111 9.072   45.000   2.680 373.134
17/32" 13.494     99 10.101   1.13/16" 46.038     2.500 400.000  
  14.000     89 11.236   1.7/8" 47.625   2.260 442.478
9/16" 14.288     84 11.905   1.15/16" 49.212     2.060 485.437
  15.000 72.00 13.889   50.000 1.950 512.821
19/32" 15.081     71 14.085   2" 50.800     1.860 537.634  
5/8" 15.875     61 16.393   2.1/8" 53.975     1.550 645.161
  16.000 60.00 16.667   55.000 1.470 680.272
21/32" 16.669     53 18.868   2.1/4" 57.150     1.310 763.359
  17.000 50.00 20.000   60.000 1.130 884.956
11/16" 17.463 46.00 21.739 2.3/8" 60.325 1.120 892.857
  18.000 42.00 23.809 2.1/2" 63.500 0.950 1,052.632
23/32" 18.256 40.00 25.000        
The weight specified above is based on the SAE 52100 steel balls.1Kg = 2.205 lbs (USA)
The multiplying factor for obtaining the approximate weight of 1000 balls, in Kgs; for other materials is as given below.

Material Multiplying Factor
Carbon Steel 1.004
Stainless Steel AISI 302 / 304 1.011
Stainless Steel AISI 316 1.025
Stainless Steel AISI 420 / 440 0.979
Brass 1.074
Aluminium 2.839