Convert grains to milligrams

Explanation

From this page you can convert grains to milligrams (or gr to mg) simply, by using the application above.

In case you are wondering, to convert from grains to milligrams you need to multiply by 64.7989. This factor is calculated using the respective definitions of the two units you can find below.

Formula

1 gr≈64.7989 mg

grainsgr

dimension	mass
symbol	gr

The grain (gr) is a unit of mass in the international mass and length units.

Definition of the grain

One grain is equal to ¹⁄₇₀₀₀ of a pound.

From the Weights and Measures Act of 1985: PART VI: Measurement of Mass

Value in terms of the SI

One grain is equal to 0.06479891 grams.

History

Traditionally, the grain was the base unit of the English weight system, a common practice in farming societies. The English grain was the weight of a single seed of barleycorn and therefore larger than other grains on the continent based on wheat.

Some Facts

The smallest bird is the bee hummingbird. With an average weight of 40 grains (2.5 grams), the females are slightly bigger than the males who only weigh 30 grains (2 grams) on average.

International Mass Units

grain	gr
dram	dr	27¹¹⁄₃₂ grains
ounce	oz	16 drams
pound	lb	16 ounces
stone*	st	14 pounds
quarter*	qr	2 stones
short hundredweight^†	cwt	100 pounds
long hundredweight*	cwt	4 quarters
short ton^†	st	20 short hundredweight
long ton*	lt	20 long hundredweight

* specific to the United Kingdom

^† specific to the United States of America

The International Mass and Length Units

The International Mass and Length Units are units based on the international yard and the international pound.

They were created in 1959 when Australia, Canada, New Zealand, South Africa, the United Kingdom and the United States of America agreed upon a common definition of the yard and the pound.

milligramsmg

dimension	mass
system	International system of units (SI)
symbol	mg

The milligram (mg) is a unit of mass in the International System of Units.

Definition of the milligram

One milligram is equal to 0.000001 kilograms.

Some Facts

A concentration of cyanide in excess of 3 milligrams per liter of blood is generally deadly. It's only 3 parts per million.

Prefix

milli

10^-3

The prefix milli- comes from the Latin mille meaning a thousand. The associated multiplicative factor is 0.001 or 10^-3.

SI Mass Units

nanogram	ng	0.000000001
microgram	µg	0.000001
milligram	mg	0.001
gram	g	1
kilogram	kg	1000
megagram	Mg	1000000

The International System of Units

The International System of Units or SI (from the French Système international (d'unité)), also called metric system in the U.S., is a coherent system of units that was published 1960. It is official in nearly every country.

The General Conference on Weights and Measures (Conférence générale des poids et mesures) is tasked with overseeing the SI.