Selecting Test Weights

Rice Lake Weighing Systems manufactures a wide selection of quality test weights for various applications. Use the resources below to help select the right test weights for the right applications.

Weight Descriptions

Selecting TEST Weights

Test weights are specially designed cast iron or stainless steel weights used to calibrate weighing equipment. Test weights are manufactured and laboratory compared to a certain degree of accuracy against a known standard. Using a reliable and certified test weight to calibrate a scale is an important part of maintaining your scale’s accuracy, and a necessity if using the scale in Legal for Trade applications. Rice Lake Weighing Systems manufactures a wide selection of quality test weights for various applications. Use the resources below to help select the right test weights for your application.

 

Cast Iron Test Weights

Cast iron test weights are commonly used as field standards to test industrial weighing devices, to test non-marked scales without class designation, and to check for acceptable tolerances. Cast iron test weights are painted gold if measured in metric units or silver if measured in avoirdupois units. Most test weights come with an adjusting cavity for sealing.

Approvals
  • NIST: Test weight capacities of 10 kilograms/20 pounds and heavier meet NIST Handbook 105-1 and Handbook 44 specifications. 

Styles
  • Available styles include grip handle, nesting slab and slotted. 
Classes
  • NIST Class F 
  • ASTM Class 6 and 7
  • OIML Class M1 and M2

 

Stainless Steel

NIST Class F stainless steel test weights are used for field standard testing for Class III scales and balances, testing non-classified scales, and checking acceptable tolerances. Most weights have a sealing cavity for adjustment, and the nominal value is marked on the test weight with an optional serial number stamp.

Approvals
  • NIST: Stainless steel test weights are designed to meet NIST Handbook 44 and 105-1, Class F tolerances. 

Styles
  • Available styles include cylindrical, grip handle, leaf and dish.  
Classes
  • NIST Class F

 

Electronic Balance Calibration Weights

Electronic balance test weights are used to calibrate Class I and II balances, and ASTM Class 4, 5 and 6 weights. Each weight is marked with the nominal value, and weights that are Class 2-4 have the option be stamped with a serial number.

Approvals
  • ASTM: Stainless steel weights are manufactured in accordance with ASTM E 617-13 specifications and tolerances.
Styles
  • Available styles include grip handle, cylindrical or leaf.  

Classes
  • ASTM Class 0-7


Precision Test Weights

Precision test weights are used to calibrate Class I and II balances and ASTM Class 4, 5 and 6 weights, for student laboratory use and rough weighing operations. Each weight is marked with the nominal value, and cylindrical weights that are Class 2-4 have the option be stamped with a serial number. 

Approvals
  • ASTM: Stainless steel weights are manufactured in accordance with ASTM E 617-13 specifications and tolerances.

Styles
  • Available styles include screw-knob, cylindrical or leaf. 

Classes
  • ASTM Class 0-4


Precision Laboratory Test Weights

Precision laboratory test weights are used to calibrate Class I and II balances, and ASTM Class 4, 5 and 6 weights. ASTM Class 0 test weights are not individually marked with their weight value or individually serialized per ASTM E 617-13. Single-piece cylindrical test weights are Type I, ASTM Class 0 and OIML Class E1 and E2, and F1 and F2 with a one-piece construction. These weights have no added adjusting material. Type II designs are cylindrical weights with adjusting cavities.

Approvals
  • ASTM: Stainless steel weights are manufactured in accordance with ASTM E 617-13 specifications and tolerances.

Styles
  • Available styles include single-piece Type I cylindrical weights and two-piece Type II cylindrical weights. 

Classes
  • ASTM Class 0-4
  • OIML Class E1 and E2, F1 and F2


test Weights and configurations

Rice Lake offers test weights as individual weights, weight kits or weight sets.

Weight Kits

Weight kits include the test weight, a case or vial for the test weight, and a proper lifting device to handle the test weight. All cylindrical ASTM kits (excluding grip-handle weights) include their own protective case and glove set for safe handling.

Weight Sets

Weight sets include the test weights, a case for the test weights, and a proper lifting device to handle the test weights.
Sets may be ordered in a 5-2-2-1 or a 5-3-2-1 configuration.
For example, a set might include

  • (1) 50 g weight, (2) 20 g weights, and (1) 10 g weight, or
  •  (1) 50 g weight, (1) 30 g weight, (1) 20 g weight, and (1) 10 g weight.

 OIML and ASTM test weight sets larger than 500 grams, or one pound, include a hardwood case with velvet-lined pockets. Test weight sets with the largest weight of 500 grams include a precision-machined polyvinyl, crush-resistant case.

 Serial numbers are not stamped on polished or milligram weights. A test weight should be more accurate than the precision of the weighing device, and it is recommended that a test weight has an accuracy of one-third the weighing device readability. 


Custom Test weights

Rice Lake offers custom test weights as individual weights, weight kits or weight sets. Our staff is ready to assist and answer your questions. Please call 800-472-6703 for help quoting your test weight needs.

Purchasing Test Weights

Before ordering test weights and weight sets, it is important to consider your application, the environment the test weights will be housed in, what tolerance and type of test weights you need as well as if you need any official documentation. Please use the following questions below to prepare your order. If there is missing information or if you have any questions regarding what you need, please call 800-472-6703. 

Application/Environment

  1. Please describe your application and tell us what you need to accomplish with the weight(s) or weight set.
  2. What is the maximum amount of weight you will need at any one time?
  3. What is the minimum amount of weight you will need at any one time?
  4. Do you need something that is custom manufactured?
  5. What is your budget for this project?
  6. Tell us about your environment. Is it:
    1. Indoor/outdoor?
    2. Wet/dry?
    3. Windy/still?
    4. Corrosive, hazardous or explosive?
    5. A clean room?
    6. An environment with biohazard, electrostatic or magnetic conditions to consider?
    7. An environment with other noteworthy conditions? If so, what are they?
  7. Are you replacing an existing weight or weight set?
  8. If the answer to question number 7 is yes:
    1. What do you like/dislike about the existing weights?
    2. What configuration is the existing set?
    3. What style is the existing set?
    4. What laboratory documentation is needed for the existing set?
  9. Does this weight set need to be Legal for Trade?
  10. What other precision services/equipment (recalibration, balances, accessories, static electricity) do you use?

Tolerance/Type of Weights

  1. What tolerance are you looking for?
  2. Is your tolerance driven by the equipment under test, the application, an internal specification, document or another source? 
  3. What "style" (ASTM, OIML, NIST) is required or preferred? 
  4. What configuration do you need (5-2-2-1, 5-3-2-1)?

Documentation

  1. Do you need ISO/IEC 17025 and ISO 9000 laboratory documentation?
  2. If you do not need ISO/IEC 17025 and ISO 9000 laboratory documentation, do you need traceability to NIST?
  3. Do you need true mass value?
  4. Do you need a book version of the Calibration Report?
  5. If you do not need any documentation, you still have the option of an RLWS Statement of Accuracy.
  6. If you are getting any of the laboratory documentation above, do you need a recall date?
    1. Your existing weights and weight sets should be recertified on a managed periodic basis. The recertification period is determined by a number of factors, including but not necessarily limited to, the environment, frequency of use, demands of the process, quality of the weighing devices in question, age of the weights in question and handling during use.

Weight Tolerance Charts
Nominal Size Class 0 Class 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7
mg mg g and mg g and mg g and mg g and mg g and mg g and mg
10000 lb 23 g 45 g 90 g 227 g 454 g 680 g
5000 lb 11 22 44 113 227 340
3000 lb 7 14 28 68 136 204
2500 lb 6 12 24 57 113 170
2000 lb 4.5 9 18 45 91 136
1000 lb 2.3 4.5 9 23 45 68
500 lb 1.7 2.3 4.6 11 23 34
100 lb 57 110 230 mg 460 mg 920 mg 2.3 4.5 6.8
50 lb 29 57 110 220 440 1.1 2.3 4.1
30 lb 17 34 68 140 260 680 mg 1.4 3
25 lb 14 28 56 110 220 570 1.1 2.5
20 lb 12 23 46 92 180 450 910 mg 2
10 lb 5.5 11 22 44 88 230 450 1.3
5 lb 2.7 5.4 11 22 43 110 230 760 mg
3 lb 1.7 3.4 6.8 14 27 68 140 510
2 lb 1.2 2.3 4.6 9.2 18 45 91 430
1 lb 0.55 1.1 2.2 4.4 8.8 27 45 270
0.5 lb 0.27 0.54 1.1 2.2 4.3 15 23 160
0.3 lb 0.17 0.34 0.68 1.4 2.7 10 14 110
0.2 lb 0.12 0.23 0.46 0.92 1.8 8.1 9.7 91
0.1 lb 0.055 0.11 0.22 0.44 1.1 5.1 6.8 56
0.05 lb 0.027 0.054 0.11 0.36 0.77 3.0 4.5 33
0.03 lb 0.017 0.034 0.068 0.32 0.59 2.0 3.2 19
0.02 lb 0.017 0.034 0.046 0.23 0.45 1.8 2.3 19
0.01 lb 0.012 0.023 0.034 0.16 0.34 1.2 1.4 12
0.005 lb 0.0075 0.015 0.024 0.14 0.27 0.86 0.91 7
0.003 lb 0.0075 0.015 0.024 0.11 0.22 0.64 0.91 5
0.002 lb 0.0075 0.015 0.024 0.091 0.19 0.50 0.91 4
0.001 lb 0.0075 0.015 0.024 0.068 0.15 0.36 0.91 3
0.0005 lb 0.009 0.023 0.07 0.15 0.3 0.9 3
0.0003 lb 0.009 0.023 0.07 0.15 0.3 0.9 3
0.0002 lb 0.009 0.023 0.07 0.15 0.3 0.9 3
0.0001 lb 0.009 0.023 0.07 0.15 0.3 0.9 3
0.00005 lb 0.009 0.023 0.07 0.15 0.3 0.9 3
0.00003 lb 0.009 0.023 0.07 0.15 0.3 0.9 3
0.00002 lb 0.009 0.023 0.07 0.15 0.3 0.9 3
0.00001 lb 0.009 0.023 0.07 0.15 0.3 0.9 3
Nominal Size Class 000 Class 00 Class 0 Class 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7
mg mg mg mg g and mg g and mg g and mg g and mg g and mg g and mg
5000 kg 25 g 50 g 100 g 250 g 500 g 750 g
3000 kg 15 30 60 g 150 300 450
2000 kg 10 20 40 g 100 200 300
1000 kg 5 10 20 g 50 100 150
500 kg 2.5 5 10 g 25 50 75
300 kg 1.5 3 6.0 g 15 30 45
200 kg 1 2 4.0 g 10 20 30
100 kg 500 mg 1 2.0 g 5 10 15
50 kg 13 mg 25 mg 63 mg 125 mg 250 500 mg 1.0 g 2.5 5 7.5
30 kg 7.5 15 38 75 150 300 600 mg 1.5 3 4.5
25 kg 6.25 12.5 31 62 125 250 500 1.2 2.5 4.5
20 kg 5.0 10 25 50 100 200 400 1.0 2 3.8
10 kg 2.5 5.0 13 25 50 100 200 500 mg 1 2.2
5 kg 1.3 2.5 6.0 12 25 50 100 250 500 mg 1.4
3 kg 0.75 1.5 3.8 7.5 15 30 60 150 300 1.0
2 kg 0.5 1.0 2.5 5.0 10 20 40 100 200 750 mg
1 kg 0.25 0.5 1.3 2.5 5.0 10 20 50 100 470
500 g 0.13 0.25 0.60 1.2 2.5 5.0 10 30 50 300
300 g 0.075 0.15 0.38 0.75 1.5 3.0 6.0 20 30 210
200 g 0.05 0.10 0.25 0.50 1.0 2.0 4.0 15 20 160
100 g 0.025 0.05 0.13 0.25 0.50 1.0 2.0 9 10 100
50 g 0.015 0.030 0.060 0.12 0.25 0.60 1.2 5.6 7 62
30 g 0.014 0.026 0.037 0.074 0.15 0.45 0.90 4.0 5 44
20 g 0.013 0.025 0.037 0.074 0.10 0.35 0.7 3.0 3 33
10 g 0.010 0.020 0.025 0.050 0.074 0.25 0.5 2.0 2 21
5 g 0.005 0.010 0.017 0.034 0.054 0.18 0.36 1.3 2 13
3 g 0.005 0.010 0.017 0.034 0.054 0.15 0.30 0.95 2 9.4
2 g 0.005 0.010 0.017 0.034 0.054 0.13 0.26 0.75 2 7.0
1 g 0.005 0.010 0.017 0.034 0.054 0.10 0.20 0.50 2 4.5
500 mg 0.002 0.003 0.005 0.010 0.025 0.080 0.16 0.38 1 3.0
300 mg 0.002 0.003 0.005 0.010 0.025 0.070 0.14 0.30 1 2.2
200 mg 0.002 0.003 0.005 0.010 0.025 0.060 0.12 0.26 1 1.8
100 mg 0.002 0.003 0.005 0.010 0.025 0.050 0.10 0.20 1 1.2
50 mg 0.002 0.003 0.005 0.010 0.014 0.042 0.085 0.16 0.5 0.88
30 mg 0.002 0.003 0.005 0.010 0.014 0.038 0.075 0.14 0.5 0.68
20 mg 0.002 0.003 0.005 0.010 0.014 0.035 0.070 0.12 0.5 0.56
10 mg 0.002 0.003 0.005 0.010 0.014 0.030 0.060 0.10 0.5 0.4
5 mg 0.002 0.003 0.005 0.010 0.014 0.028 0.055 0.080 0.2
3 mg 0.002 0.003 0.005 0.010 0.014 0.026 0.052 0.070 0.2
2 mg 0.002 0.003 0.005 0.010 0.014 0.025 0.05 0.06 0.2
1 mg 0.002 0.003 0.005 0.010 0.014 0.025 0.05 0.05 0.1
0.5 mg 0.002 0.003 0.005 0.010 0.014 0.025 0.05 0.05 0.1
0.3 mg 0.002 0.003 0.005 0.010 0.014 0.025
0.2 mg 0.002 0.003 0.005 0.010 0.014
0.1 mg 0.002 0.003 0.005 0.010
0.05 mg 0.002 0.003 0.005
Nominal Size Class 0 Class 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7
mg mg mg mg mg mg mg mg
10 oz 0.4 0.7 1.4 2.8 5.4 19 45 320
8 oz 0.3 0.6 1.2 2.3 4.5 16 23 180
5 oz 0.18 0.35 0.70 1.4 2.8 12 16 160
4 oz 0.14 0.28 0.55 1.1 2.3 9.5 11 110
3 oz 0.12 0.23 0.45 0.91 1.8 8.2 8.1 73
2 oz 0.07 0.13 0.26 0.64 1.3 5.9 5.4 48
1 oz 0.04 0.07 0.14 0.42 0.86 3.9 3.2 28
1/2 oz 0.02 0.04 0.08 0.3 0.59 2.5 2.3 25
1/4 oz 0.015 0.03 0.06 0.2 0.43 1.5 1.4 9.1
1/8 oz 0.015 0.029 0.058 0.16 0.31 1.1 0.91 4.3
1/16 oz 0.013 0.025 0.050 0.12 0.24 0.73 0.91 4.3
1/32 oz 0.008 0.015 0.030 0.095 0.19 0.5 0.91 4.3
1/64 oz 0.006 0.012 0.024 0.077 0.15 0.36 0.91 4.3
0.50 oz 0.080 0.3 0.59 2.5 2.3 25
0.3 oz 0.068 0.23 0.45 1.8 1.4 9.1
0.2 oz 0.057 0.19 0.38 1.4 0.91 5.9
0.1 oz 0.050 0.14 0.29 0.91 0.91 4.3
0.05 oz 0.050 0.11 0.23 0.64 0.91 2.0
0.03 oz 0.030 0.095 0.19 0.45 0.91 2.0
0.02 oz 0.023 0.077 0.18 0.4 0.91 2.0
0.01 oz 0.023 0.064 0.14 0.3 0.91 2.0
0.005 oz 0.023 0.054 0.11 0.23
0.003 oz 0.023 0.05 0.095 0.19
0.002 oz 0.023 0.044 0.086 0.16
0.001 oz 0.023 0.038 0.077 0.13
0.0005 oz 0.023 0.031 0.064 0.11
0.0003 oz 0.023 0.029 0.059 0.095
0.0002 oz 0.023 0.027 0.054 0.086
0.0001 oz 0.023 0.026 0.05 0.073
Nominal Size Class 0 Class 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7
mg mg mg g and mg g and mg
1000 oz t 160 mg 310 mg 620 mg 1.6 g 3.2 g
500 oz t 80 160 310 770 mg 1.5
300 oz t 45 90 190 470 940 mg
200 oz t 31 62 120 310 620
100 oz t 16 31 62 160 320
50 oz t 8 16 31 77 150
30 oz t 4.6 9.1 19 47 94
20 oz t 3.1 6.2 12 35 58
10 oz t 1.6 3.1 6.2 21 32
5 oz t 0.8 1.6 3.1 12 16
3 oz t 0.46 0.91 1.9 8.4 9.3
2 oz t 0.71 1.4 6.4 8.0
1 oz t 0.45 0.91 4.2 4.2
0.5 oz t 0.31 0.62 2.6 2.6
0.3 oz t 0.24 0.49 1.9 1.9
0.2 oz t 0.20 0.40 1.5 2.3
0.1 oz t 0.15 0.30 0.97 2.0
0.05 oz t 0.12 0.23 0.65 2.0
0.03 oz t 0.097 0.19 0.49 2.0
0.02 oz t 0.084 0.17 0.41 1.1
0.01 oz t 0.071 0.14 0.31 1.0
0.005 oz t 0.056 0.11 0.23 1.0
0.003 oz t 0.049 0.097 0.19 1.0
0.002 oz t 0.044 0.091 0.17 0.50
0.001 oz t 0.038 0.078 0.14 0.50
0.0005 oz t 0.033 0.065 0.11 0.50
0.0003 oz t 0.030 0.060 0.097 0.50
0.0002 oz t 0.028 0.056 0.084 0.50
0.0001 oz t 0.026 0.052 0.071 0.50
Nominal Size Class 0 Class 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7
g and mg g and mg g and mg
10000 dwt 0.31 g 0.78 g 1.5 g
5000 dwt 0.16 0.39 0.78
3000 dwt 91 mg 0.23 0.46
2000 dwt 62 0.16 0.32
1000 dwt 31 78 mg 0.16
500 dwt 16 41 82 mg
300 dwt 9.1 28 56
200 dwt 6.2 21 42
100 dwt 3.1 12 24
50 dwt 1.6 7.8 16
30 dwt 1.2 5.3 11
20 dwt 0.91 4.2 8.4
10 dwt 0.62 2.6 5.2
5 dwt 0.44 1.7 3.4
3 dwt 0.34 1.3 2.6
2 dwt 0.3 0.97 1.9
1 dwt 0.23 0.65 1.3
Nominal Size Class 0 Class 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7
mg mg mg
10000 gr 13 36 36
5000 gr 6.5 22 22
3000 gr 3.9 15 15
2000 gr 2.6 11 11
1000 gr 1.4 6.3 6.3
500 gr 0.91 3.2 3.2
300 gr 0.65 2.3 2.3
200 gr 0.57 1.4 1.4
100 gr 0.4 0.91 0.91
50 gr 0.3 0.91 0.91
30 gr 0.25 0.71 0.71
20 gr 0.21 0.58 0.58
10 gr 0.17 0.42 0.42
5 gr 0.14 0.31 0.31
3 gr 0.12 0.25 0.25
2 gr 0.11 0.22 0.22
1 gr 0.091 0.17 0.17
0.5 gr 0.078 0.14 0.14
0.3 gr 0.071 0.12 0.12
0.2 gr 0.064 0.11 0.11
0.1 gr 0.056 0.091 0.091
0.05 gr 0.052 0.071 0.071
0.03 gr 0.051 0.071 0.071
0.02 gr 0.05 0.071 0.071
0.01 gr 0.05 0.070 0.071
Nominal Size Class 0 Class 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7
mg mg mg mg mg
5000 c 10 20 50 100 470
3000 c 6.0 12 36 60 334
2000 c 4.0 8.0 27 44 287
1000 c 2.0 4.0 15 20 160
500 c 1.0 2.0 9 10 100
300 c 0.69 1.3 6 8 70
200 c 0.52 1.0 4.4 5 44
100 c 0.35 0.7 3 3 33
50 c 0.25 0.50 2 2 21
30 c 0.19 0.40 1.4 2 13
20 c 0.16 0.33 1 2 13
10 c 0.13 0.26 0.75 2 13
5 c 0.10 0.20 0.5 2 13
3 c 0.086 0.17 0.39 1 3
2 c 0.075 0.15 0.32 1 3
1 c 0.060 0.12 0.26 1 3
0.5 c 0.050 0.10 0.2 1 3
0.3 c 0.044 0.089 0.18 0.5 0.88
0.2 c 0.040 0.080 0.15 0.5 0.88
0.1 c 0.035 0.070 0.12 0.5 0.88
0.05 c 0.030 0.060 0.1 0.5 0.88
0.03 c 0.028 0.056 0.08 0.2
0.02 c 0.027 0.053 0.07 0.2
0.01 c 0.025 0.050 0.06 0.2
Apothecary Ounce
12 oz ap 7.5 15 45 290
10 oz ap 4.5 9 36 280
6 oz ap 3.5 7 23 184
5 oz ap 3.0 6 18 144
4 oz ap 2.5 5 16 128
3 oz ap 1.50 3 11 110
2 oz ap 1.00 2 9.1 91
1 oz ap 0.60 1.2 4.5 40
Apothecary Dram
6 dr ap 0.40 0.8 3.6 36
5 dr ap 0.30 0.6 2.7 27
4 dr ap 0.27 0.55 2.3 23
3 dr ap 0.20 0.4 1.8 18
2 dr ap 0.20 0.4 1.8 18
1 dr ap 0.17 0.35 1.4 14
Apothecary Scruple
2 s ap 0.17 0.35 1.4 14
1 s ap 0.15 0.30 0.91 9.1
105-1
Denomination Metric F g and mg
5000 kg 500 g
3000 kg 300 g
2000 kg 200 g
1000 kg 100 g
500 kg 50 g
300 kg 30 g
200 kg 20 g
100 kg 10 g
50 kg 5.0 g
30 kg 3.0 g
25 kg 2.5 g
20 kg 2.0 g
10 kg 1.0 g
5 kg 500 mg
3 kg 300 mg
2 kg 200 mg
1 kg 100 mg
500 g 70 mg
300 g 60 mg
200 g 40 mg
100 g 20 mg
50 g 10 mg
30 g 6.0 mg
20 g 4.0 mg
10 g 2.0 mg
5 g 1.5 mg
3 g 1.3 mg
2 g 1.1 mg
1 g 0.90 mg
500 mg 0.72 mg
300 mg 0.61 mg
200 mg 0.54 mg
100 mg 0.43 mg
50 mg 0.35 mg
30 mg 0.30 mg
20 mg 0.26 mg
10 mg 0.21 mg
5 mg 0.17 mg
3 mg 0.14 mg
2 mg 0.12 mg
1 mg 0.10 mg
105-1
Denomination Metric F g and mg
10,000 lb 450 g
5000 lb 230
3000 lb 140
2500 lb 110
2000 lb 91
1000 lb 45
500 lb 23
100 lb 4.5
50 lb 2.3
40 lb
30 lb 1.4
25 lb 1.1
20 lb 910 mg
15 lb
10 lb 450
9 lb
8 lb
7 lb
6 lb
5 lb 230
4 lb
3 lb 140
2 lb 91
1 lb 70
0.5 lb 45
0.3 lb 27
0.2 lb 18
0.1 lb 9.1
0.05 lb 4.5
0.03 lb 2.7
0.02 lb 1.8
0.01 lb 1.5
0.005 lb 1.2
0.003 lb 0.99
0.002 lb 0.87
0.001 lb 0.70
0.0005 lb
0.0003 lb
0.0002 lb
0.0001 lb
0.00005 lb
0.00003 lb
0.00002 lb
0.00001 lb
105-1
Denomination
Metric
F mg
12 oz
10 oz
8 oz 45
6 oz
5 oz
4 oz 23
3 oz
2 oz 11
1 oz 5.4
1/2 oz 2.8
1/4 oz 1.7
1/8 oz 1.3
1/16 oz 1.1
1/32 oz 0.87
1/64 oz 0.69
0.5 oz 2.8
0.3 oz 1.8
0.2 oz 1.6
0.1 oz 1.3
0.05 oz 1.0
0.03 oz 0.85
0.02 oz 0.75
0.01 oz 0.60
0.005 oz
0.003 oz
0.002 oz
0.001 oz
0.0005 oz
0.0003 oz
0.0002 oz
0.0001 oz
Class E1 Class E2 Class F1 Class F2 Class M1 Class M2 Class M3
Nominal Size mg mg mg mg mg mg mg
5000 kg 25,0000 80,000 250,000 800,000 2,500,000
3000 kg
2000 kg 10,000 30,000 100,000 300,000 1,000,000
1000 kg 1,600 5,000 16,000 50,000 100,000 500,000
500 kg 800 2,500 8,000 25,000 80,000 250,000
300 kg
200 kg 300 1,000 3,000 10,000 30,000 100,000
100 kg 160 500 1,600 5,000 16,000 50,000
50 kg 25 80 250 800 2500 8000 25,000
30 kg
25 kg
20 kg 10 30 100 300 1000 3000 10,000
10 kg 5 16 50 160 500 1600 5000
5 kg 2.5 8.0 25 80 250 800 2500
3 kg
2 kg 1.0 3.0 10 30 100 300 1000
1 kg 0.5 1.6 5 16 50 160 500
500 g 0.25 0.8 2.5 8.0 25 80 250
300 g
200 g 0.1 0.30 1.0 3.0 10 30 100
100 g 0.05 0.16 0.5 1.6 5 16 50
50 g 0.03 0.10 0.30 1.0 3.0 10 30
30 g
20 g 0.025 0.080 0.25 0.8 2.5 8 25
10 g 0.020 0.060 0.20 0.6 2.0 6 20
5 g 0.016 0.050 0.16 0.5 1.6 5 16
3 g
2 g 0.012 0.040 0.12 0.4 1.2 4 12
1 g 0.010 0.030 0.10 0.3 1.0 3 10
500 mg 0.008 0.025 0.08 0.25 0.8 2.5
300 mg
200 mg 0.006 0.020 0.06 0.20 0.6 2
100 mg 0.005 0.016 0.05 0.16 0.5 1.6
50 mg 0.004 0.012 0.04 0.12 0.4
30 mg
20 mg 0.003 0.010 0.03 0.10 0.3
10 mg 0.003 0.008 0.025 0.08 0.25
5 mg 0.003 0.006 0.020 0.06 0.20
3 mg
2 mg 0.003 0.006 0.020 0.06 0.20
1 mg 0.003 0.006 0.020 0.06 0.20
Conversion Factors
UNITS GRAINS APOTHECARIES SCRUPLES PENNYWEIGHTS AVOIRDUPOIS DRAMS APOTHECARIES DRAMS AVOIRDUPOIS OUNCES
1 grain = 1 0.05 0.041 666 67 0.036 571 43 0.016 666 67 0.002 285 714
1 apoth. scruple = 20 1 0.833 333 3 0.731 428 6 0.333 333 3 0.045 714 29
1 pennyweight = 24 1.2 1 0.877 714 3 0.4 0.054 857 14
1 avdp. dram = 27.343 75 1.367 187 5 1.139 323 1 0.455 729 2 0.062 5
1 apoth. dram = 60 3 2.5 2.194 286 1 0.137 142 9
1 avdp. oz = 437.5 21.875 18.229 17 16 7.291 667 1
1 apoth. or troy ounce = 480 24 20 17.554 29 8 1.097 143
1 apoth. or troy pound = 5760 288 240 210.651 4 96 13.165 71
1 avdp. lb = 7000 350 291.666 7 256 116.666 7 16
1 milligram = 0.015 432 36 0.000 771 617 9 0.000 643 014 9 0.000 564 383 4 0.000 257 206 0 0.000 035 273 96
1 gram = 15.432 36 0.771 617 9 0.643 014 9 0.564 383 4 0.257 206 0 0.035 273 96
1 kilogram = 15432.36 771.617 9 643.014 9 564.383 4 257.206 0 35.273 96
UNITS APOTHECARIES OR TROY OUNCES APOTHECARIES OR TROY POUNDS AVOIRDUPOIS POUNDS MILLIGRAMS GRAMS KILOGRAMS
1 grain = 0.002 083 333 0.00 173 611 1 0.000 142 857 1 64.798 91 0.064 798 91 0.000 064 798 91
1 apoth. scruple = 0.041 666 67 0.003 472 22 0.002 857 143 1295.978 2 1.295 978 2 0.001 295 978 2
1 pennyweight = 0.05 0.004 166 667 0.003 428 571 1555.173 84 1.555 173 84 0.001 555 173 84
1 avdp. dram = 0.056 966 15 0.004 747 179 0.003 906 25 1771.845 195 312 5 1.771 845 195 312 5 0.001 771 845 195 312 5
1 apoth. dram = 0.125 0.010 416 67 0.008 571 429 3887.934 6 3.887 934 6 0.003 887 934 6
1 avdp. oz = 0.911 458 3 0.075 954 86 0.062 5 28 349.523 125 28.349 523 125 0.028 349 523 125
1 apoth. or troy ounce = 1 0.083 333 333 0.068 571 43 31 103.476 8 31.103 476 8 0.031 103 476 8
1 apoth. or troy pound = 12 1 0.822 857 1 373 241.721 6 373.241 721 6 0.373 241 721 6
1 avdp. lb = 14.583 33 1.215 278 1 453 592.37 453.592 37 0.453 592 37
1 milligram = 0.000 032 150 75 0.000 002 679 229 0.000 002 204 623 1 0.001 0.000 0001
1 gram = 0.032 150 75 0.002 679 229 0.002 204 623 1000 1 0.001
1 kilogram = 32.150 75 2.679 229 2.204 623 1,000,000 1000 1
UNITS AVOIRDUPOIS OUNCES AVOIRDUPOIS POUNDS SHORT HUNDREDWEIGHTS SHORT TONS LONG TONS KILOGRAMS METRIC TONS
1 avdp. oz = 1 0.0625 0.000 625 0.000 031 25 0.000 027 901 79 0.028 349 523 125 0.000 028 349 523 125
1 avdp. lb = 16 1 0.01 0.000 5 0.000 446 428 6 0.453 592 37 0.000 453 592 37
1 short hundredweight = 1600 100 1 0.05 0.044 642 86 45.359 237 0.045 359 237
1 short ton = 32,000 2000 20 1 0.892 857 1 907.184 74 0.907 184 74
1 long ton = 35,840 2240 22.4 1.12 1 1016.046 908 8 1.016 046 908 8
1 kilogram = 35.273 96 2.204 623 0.022 046 23 0.001 102 311 0.000 984 206 5 1 0.001
1 metric ton = 35 273.96 2204.623 22.046 23 1.102 311 0.984 206 5 1000 1

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