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Rice Lake Weighing Systems Selecting Calibration Weights

Selecting Calibration Weights

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

Calibration 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.

Weight Kits

Weight Sets

Custom Calibration 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. Or fill out a custom calibration weight form below.

Custom Weights

Weight Descriptions

Calibration 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 Calibration Weights

cast-iron

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 Calibration Weights

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 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 Calibration Weights

precision-calibration-weight

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 Calibration Weights

precision-lab-weight

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

Purchasing Calibration 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 or Environment

Please describe your application and tell us what you need to accomplish with the weight(s) or weight set.
What is the maximum amount of weight you will need at any one time?
What is the minimum amount of weight you will need at any one time?
Do you need something that is custom manufactured?
What is your budget for this project?
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?
Are you replacing an existing weight or weight set?
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?
Does this weight set need to be Legal for Trade?
What other precision services/equipment (recalibration, balances, accessories, static electricity) do you use?

Tolerance or Type of Weights

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

Documentation

Do you need ISO/IEC 17025 and ISO 9000 laboratory documentation?
If you do not need ISO/IEC 17025 and ISO 9000 laboratory documentation, do you need traceability to NIST?
Do you need true mass value?
Do you need a book version of the Calibration Report?
If you do not need any documentation, you still have the option of an RLWS Statement of Accuracy.
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

Weight Conversion Charts allow users to identify the weight needed to calibrate a scale or balance. Select the chart applicable for your application.

Once you have your chart, identify the nominal size based on the capacity of your scale or balance. Then, divide the display resolution by 4 to determine your maximum permissible error (MPE). That MPE will be on your nominal size row. Once you find your MPE cell, identify the column name, which will provide your weight class.

Example Use Case:

We have a 200 gram capacity balance and we want to find an ASTM weight to calibrate the balance at or near capacity.

Find the nominal size of 200 g on the farthest left column of the table.
Use the MPE formula: Display Resolution / 4 = MPE
1. For our example: 0.001 g / 4 = 0.25 mg
Find the cell in your nominal row with 0.25 mg
Find the column name for that cell to determine your Class
1. For our example: Class 0 ASTM weight

ASTM E617-13 (Avoirdupois)

ASTM E617-13 (Metric)

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

ASTM E617-13 (Ounces)

ASTM E17-13 (Troy Ounces)

ASTM E617-13 (Pennyweight)

ASTM E17-13 (Grains)

ASTM E617-13 (Carats/Apothecary Scruples)

NIST 105-1 Class F (Metric)

NIST 105-1 Class F (Avoirdupois Pounds)

NIST 105-1 Class F (Avoirdupois Ounces)

OIML RIII-I 2004 (Metric)

Conversion Factors

Units of Mass Not Greater than Pounds and Kilograms

Units of Mass Not Greater than Pounds and Kilograms Cont.

Units of Mass Not Greater than Avoirdupois Ounces

Learn More About Calibration Weights

Our articles, case studies, and videos are great sources to learn more about calibration weights. Visit the resources below to learn more.

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 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

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 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

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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