| Inch Fractions | Inch Decimals | Metric (mm) | Weight 1000 balls (kg) | Approximate Qty per Litre | Inch Fractions | Inch Decimals | Metric (mm) | Weight 1000 balls (kg) |
|---|---|---|---|---|---|---|---|---|
| 1/64 | .0156 | 0.397 | .00026 | - | - | .7480 | 19.000 | 27.98 |
| - | .0197 | 0.500 | .00051 | - | 3/4 | .7500 | 19.050 | 28.20 |
| 1/32 | .0312 | 0.794 | .00210 | 2,100,000 | 25/32 | .7812 | 19.844 | 31.87 |
| - | .0394 | 1.000 | .00407 | 1,210,000 | - | .7874 | 20.000 | 32.63 |
| 3/64 | .0469 | 1.190 | .00688 | 695,000 | 13/16 | .8125 | 20.637 | 35.85 |
| - | .0472 | 1.200 | .00704 | 676,700 | - | .8268 | 21.000 | 37.77 |
| - | .0590 | 1.500 | .01377 | 347,000 | 27/32 | .8437 | 21.431 | 40.15 |
| 1/16 | .0625 | 1.588 | .01632 | 289,000 | - | .8661 | 22.000 | 43.43 |
| 5/64 | .0781 | 1.984 | .03187 | 151,000 | 7/8 | .8750 | 22.225 | 44.78 |
| - | .0787 | 2.000 | .0326 | 146,000 | - | .9055 | 23.000 | 49.63 |
| 3/32 | .0937 | 2.381 | .0550 | 87,000 | 29/32 | .9062 | 23.019 | 49.75 |
| - | .0984 | 2.500 | .0638 | 75,500 | 15/16 | .9375 | 23.812 | 55.07 |
| 7/64 | .1094 | 2.778 | .0875 | 55,000 | - | .9449 | 24.000 | 56.39 |
| - | .1181 | 3.000 | .1101 | 43,000 | 31/32 | .9687 | 24.606 | 60.77 |
| 1/8 | .1250 | 3.175 | .1305 | 37,000 | - | .9842 | 25.000 | 63.73 |
| - | .1378 | 3.500 | .1749 | 27,200 | 1 | 1.0000 | 25.400 | 66.84 |
| 9/64 | .1406 | 3.572 | .1859 | 25,700 | - | 1.0236 | 26.000 | 71.69 |
| 5/32 | .1562 | 3.969 | .2550 | 18,700 | 1.1/16 | 1.0625 | 26.987 | 80.17 |
| - | .1575 | 4.000 | .2610 | 18,500 | - | 1.1024 | 28.000 | 89.54 |
| 11/64 | .1719 | 4.366 | .3394 | 14,300 | 1.1/8 | 1.1250 | 28.575 | 95.17 |
| - | .1772 | 4.500 | .3716 | 13,000 | - | 1.1811 | 30.000 | 110.10 |
| 3/16 | .1875 | 4.762 | .4406 | 10,700 | 1.3/16 | 1.1875 | 30.162 | 111.90 |
| - | .1968 | 5.000 | .5099 | 9,500 | 1.1/4 | 1.2500 | 31.750 | 130.50 |
| - | .2165 | 5.500 | .6786 | 7,150 | - | 1.2598 | 32.000 | 133.70 |
| 7/32 | .2187 | 5.556 | .6996 | 6,800 | 1.5/16 | 1.3125 | 33.337 | 151.10 |
| 15/64 | .2344 | 5.953 | .8605 | 5,450 | - | 1.3386 | 34.000 | 160.30 |
| - | .2362 | 6.000 | .8810 | 5,400 | 1.3/8 | 1.3750 | 34.925 | 173.80 |
| 1/4 | .2500 | 6.350 | 1.044 | 4,550 | - | 1.3780 | 35.000 | 174.90 |
| - | .2559 | 6.500 | 1.120 | 4,300 | - | 1.4173 | 36.000 | 190.30 |
| 17/64 | .2656 | 6.747 | 1.253 | 3,800 | 1.7/16 | 1.4375 | 36.512 | 198.50 |
| - | .2756 | 7.000 | 1.399 | 3,400 | - | 1.4960 | 38.000 | 223.80 |
| 9/32 | .2812 | 7.144 | 1.487 | 3,250 | 1.1/2 | 1.5000 | 38.100 | 225.60 |
| - | .2953 | 7.500 | 1.721 | 2,800 | 1.9/16 | 1.5625 | 39.687 | 255.00 |
| 19/64 | .2969 | 7.541 | 1.749 | 2,750 | - | 1.5748 | 40.000 | 261.00 |
| 5/16 | .3125 | 7.938 | 2.040 | 2,350 | 1.5/8 | 1.6250 | 41.275 | 286.80 |
| - | .3150 | 8.000 | 2.088 | 2,150 | 1.11/16 | 1.6875 | 42.862 | 321.20 |
| - | .3346 | 8.500 | 2.505 | 1,900 | 1.3/4 | 1.7500 | 44.450 | 358.20 |
| 11/32 | .3437 | 8.731 | 2.715 | 1,750 | - | 1.7716 | 45.000 | 371.70 |
| - | .3543 | 9.000 | 2.973 | 1,600 | 1.13/16 | 1.8125 | 46.037 | 398.00 |
| 23/64 | .3594 | 9.128 | 3.102 | 1,480 | 1.7/8 | 1.8750 | 47.625 | 440.60 |
| - | .3740 | 9.500 | 3.497 | 1,350 | 1.15/16 | 1.9375 | 49.212 | 486.10 |
| 3/8 | .3750 | 9.525 | 3.525 | 1,300 | - | 1.9685 | 50.000 | 509.90 |
| 25/64 | .3906 | 9.922 | 3.983 | 1,150 | 2 | 2.000 | 50.800 | 534.70 |
| - | .3937 | 10.000 | 4.079 | 1,125 | 2.1/8 | 2.1250 | 53.975 | 641.40 |
| 13/32 | .4062 | 10.319 | 4.481 | 1,050 | - | 2.1653 | 55.000 | 678.60 |
| - | .4331 | 11.000 | 5.429 | 820 | 2.1/4 | 2.2500 | 57.150 | 761.30 |
| 7/16 | .4375 | 11.112 | 5.597 | 810 | - | 2.3622 | 60.000 | 881.00 |
| - | .4528 | 11.500 | 6.203 | 720 | 2.3/8 | 2.3750 | 60.325 | 895.40 |
| 29/64 | .4531 | 11.590 | 6.219 | 720 | 2.1/2 | 2.5000 | 63.500 | 1044.40 |
| 15/32 | .4687 | 11.906 | 6.884 | 620 | - | 2.5590 | 65.000 | 1120.10 |
| - | .4724 | 12.000 | 7.048 | 615 | 2.5/8 | 2.6250 | 66.675 | 1209.00 |
| 31/64 | .4844 | 12.303 | 7.596 | 610 | 2.3/4 | 2.7500 | 69.850 | 1390.10 |
| 1/2 | .5000 | 12.700 | 8.355 | 550 | - | 2.7559 | 70.000 | 1484.70 |
| - | .5118 | 13.000 | 8.961 | 490 | 2.7/8 | 2.8750 | 73.025 | 1588.40 |
| 17/32 | .5312 | 13.494 | 10.02 | 450 | - | 2.9528 | 75.000 | 1720.70 |
| - | .5512 | 14.000 | 11.19 | 410 | 3 | 3.000 | 76.200 | 1804.70 |
| 9/16 | .5625 | 14.288 | 11.90 | 380 | 3.1/8 | 3.1250 | 79.375 | 2039.80 |
| - | .5905 | 15.000 | 13.77 | 325 | - | 3.1500 | 80.000 | 2088.30 |
| 19/32 | .5937 | 15.081 | 13.99 | 320 | 3.1/4 | 3.2500 | 82.550 | 2294.40 |
| 5/8 | .6250 | 15.875 | 16.32 | 300 | - | 3.3464 | 85.000 | 2530.90 |
| - | .6299 | 16.000 | 16.70 | 275 | 3.1/2 | 3.5000 | 88.900 | 2865.70 |
| 21/32 | .6562 | 16.669 | 18.89 | 240 | - | 3.5433 | 90.000 | 2993.40 |
| - | .6693 | 17.000 | 20.04 | 230 | - | 3.7401 | 95.000 | 3521.10 |
| 11/16 | .6785 | 17.462 | 21.72 | 205 | 3.3/4 | 3.7500 | 95.250 | 3524.70 |
| - | .7087 | 18.000 | 23.79 | 190 | - | 3.9370 | 100.000 | 4078.80 |
| 23/32 | 27187 | 18.256 | 24.82 | 180 | 4 | 4.000 | 101.600 | 4277.70 |
The weights shown are based on Chrome Alloy Steel balls.
Approximate weights for other materials can be obtained by multiplying the weight per 1000 balls by the following figures:-
| Carbon Steel | 1.004 |
| Stainless Steel AISI 420/440 | 0.979 |
| Stainless Steel AISI 302/304 | 1.011 |
| Stainless Steel AISI 316 | 1.025 |
| Brass | 1.074 |
| Tungsten Carbide | 1.907 |
