The conversion formula for milligrams (mg) to grains (gr) conversions is as follows:

• 1 milligram = 0.15432358 grains

The conversion formula for grains (gr) to milligrams (mg) conversions is as follows:

• 1 grain = 64.79891 milligrams

The milligram is a unit equal to one thousandth of a gram and is often used in pharmaceuticals and food labelling for active ingredients vitamins and trace elements.

Unit System

SI Metric

Definition

The milligram is defined as being 1/1,000,000 of a kilogram.

Base Unit

kilogram

Abbreviation

Formal: mg

Information

The milligram is one of the smallest units of weight in everyday use, often being used for measurement of active ingredients in tablets and vitamins, minerals and trace elemments in food products.

Global Adoption

The milligram is used throughout the world in medical science applications, and everywhere except the USA in food labelling.

Conversion Formulae

• 1 milligram = 1,000 micrograms
• 1 milligram = 0.1 centigrams
• 1 milligram = 0.01 decigrams
• 1 milligram = 0.001 grams
• 1 milligram = 0.0001 decagrams
• 1 milligram = 0.00001 hectograms
• 1 milligram = 0.000001 kilograms
• 1 milligram = 0.000000001 megagrams

 

• 1 microgram = 0.001 milligrams
• 1 centigram = 10 milligrams
• 1 decigram = 100 milligrams
• 1 gram = 1,000 milligrams
• 1 decagram = 10,000 milligrams
• 1 hectogram = 100,000 milligrams
• 1 kilogram = 1,000,000 milligrams
• 1 megagram = 1,000,000,000 milligrams

The grain was the base unit of the English weight system and is the only common unit across the Avoirdupois, Troy and Apothercaries systems. It is part of both the British Imperial and US Customary systems, being equal to 1/7000th of a pound. Since 1959 it has been formerly defined in terms of the SI system of units as 64.79891 milligrams

Unit System

Avoirdupois - British Imperial & US Customary

Definition

The grain is defined has 64.79891 milligrams as from the International Yard and Pound agreement of 1959.

Base Unit

Pound

There are 7000 grains to the avoirdupois pound and 5760 grains to the troy pound or apothecaries pound.

Abbreviation

Formal: gr

Information

The grain is one of the earliest measures of weight with recorded uses in ancient Greece. It is based upon the weight of wheat and/or barley grains dependent on location, although these grain seeds can vary significantly in weight.

The grain was adopted into the avoirdupois weight system in 1588 by Elizabeth I of England and thus became part of the British Imperial and US Customary weight systems. It is the smallest unit of the avoirdupois system.

Grains were formerly used in weights for a lot of medicinal compounds and are still used for weighing gunpowder and for indicating the level of propellant in bullets.

In the US grains are used when measuring emissions and the amount of moisture in the air with grains/cubic foot being used as the unit.

Global Adoption

Grains are used primarily in the US, with usage in most other countries having been replaced by metric units.

Conversion Formulae

To/From British Imperial Units

• 1 grain = 0.036571429 drams
• 1 grain = 0.002285714 ounces
• 1 grain = 0.000142857 pounds
• 1 grain = 0.000010204 stones
• 1 grain = 0.000005102 quarters
• 1 grain = 0.000001276 hundredweight
• 1 grain = 0.000000064 tons

 

• 1 dram = 27.34375 grains
• 1 ounce = 437.5 grains
• 1 pound = 7,000 grains
• 1 stone = 98,000 grains
• 1 quarter = 196,000 grains
• 1 hundredweight = 784,000 grains
• 1 ton = 15,680,000 grains

To/From US Customary Units

• 1 grain = 0.036571429 drams
• 1 grain = 0.002285714 ounces
• 1 grain = 0.000142857 pounds
• 1 grain = 0.000005714 quarters
• 1 grain = 0.000001429 hundredweight
• 1 grain = 0.000000071 tons

 

• 1 dram = 27.34375 grains
• 1 ounce = 437.5 grains
• 1 pound = 7,000 grains
• 1 quarter = 175,000 grains
• 1 hundredweight = 700,000 grains
• 1 ton = 14,000,000 grains

To/From Metric Units

• 1 grain = 64,798.91 micrograms
• 1 grain = 64.79891 milligrams
• 1 grain = 6.479891 centigrams
• 1 grain = 0.6479891 decigrams
• 1 grain = 0.06479891 grams
• 1 grain = 0.006479891 decagrams
• 1 grain = 0.0006479891 hectograms
• 1 grain = 0.00006479891 kilograms
• 1 grain = 0.00000006479891 megagrams

 

• 1 microgram = 0.000015432 grains
• 1 milligram = 0.015432 grains
• 1 centigram = 0.154324 grains
• 1 decigram = 1.543236 grains
• 1 gram = 15.432358 grains
• 1 decagram = 154.323584 grains
• 1 hectogram = 1,543.235835 grains
• 1 kilogram = 15,432.358352 grains
• 1 megagram = 15,432,358.352 grains

mg	gr
1	0.154
2	0.309
3	0.463
4	0.617
5	0.772
6	0.926
7	1.080
8	1.235
9	1.389
10	1.543

mg	gr
10	1.543
20	3.086
30	4.630
40	6.173
50	7.716
60	9.259
70	10.803
80	12.346
90	13.889
100	15.432

mg	gr
100	15.432
200	30.865
300	46.297
400	61.729
500	77.162
600	92.594
700	108.027
800	123.459
900	138.891
1,000	154.324

gr	mg
1	64.80
2	129.60
3	194.40
4	259.20
5	323.99
6	388.79
7	453.59
8	518.39
9	583.19
10	647.99

gr	mg
10	647.99
20	1,295.98
30	1,943.97
40	2,591.96
50	3,239.95
60	3,887.93
70	4,535.92
80	5,183.91
90	5,831.90
100	6,479.89

gr	mg
100	6,479.89
200	12,959.78
300	19,439.67
400	25,919.56
500	32,399.46
600	38,879.35
700	45,359.24
800	51,839.13
900	58,319.02
1,000	64,798.91

•   Milligrams to Ounces

•   Grams to Ounces

•   Grams to Pounds

•   Kilograms to Pounds

•   Lengths

•   Temperatures

•   Areas

•   Speeds

•   Volumes