Imperial and Metric system for weight and measurements

Weight and Measures:

·         Mainly two system available

o   Metric System (Decimal system)

o   Imperial System (English system)

§  Avoirdupois system

§  Apothecaries system

Metric System:

·         Modern and most scientific

·         Based on decimal point, (0)

·         Mass (Weigth): kg, gm, mg, mcg, Nanogram etc.

·         Liquid measurement: L, dl, cl, ml, mcl etc

Imperial System:

Avoirdupois:

·         Widely adopted in UK

·         Official in BP

·         Used for buy wholesale drug

Apothecaries:

·         Generally used by physician and dispensing chemist

Avoirduposis		Apothecaries		Unit in increasing order for Weight
For Weights (Mass)
1 LB =	7000 grains	1 LB =	5760 grains	Grain
1 LB =	16 oz	1 LB =	12 oz	Scruple
1 oz =	437.5 grains	1 oz =	480 grains	Drachm
1 oz =	16 dram	1 oz	8 drachm	Ounce
1 dram =	27.34 grain	1 drachm	60 grains	Pound
		1 scruple	20 grains
For fluid volume (capacity) Both system have same value				Unit in increasing order for capacity
1 gallon =	8 pints	60 minims =	1 fl dr	Minims
1 gallon =	4 quarts	8 fl dr =	1 fl oz	fl drachm
1 gallon =	160 fl oz	20 fl oz =	1 pint	fl oz
1 quarts =	2 pints	2 pints =	1 quarts	Pint
1 pint =	20 fl oz	4 quarts =	1 gallon	Quarts
1 quarts =	40 fl oz			gallon
1 fl oz =	8 fl drachm
1 fl dr =	60 minims
1 fl oz =	480 minims

Imperial System	Metric System	Imperial System	Metric System
Mass		Volume
1 grain =	60 mg	15 minims =	1 ml
15 grains =	1 gm	1 fl dr = 60 minims =	4 ml
1 drachm = 60 grain =	4 gm	1 fl oz = 460 minims =	30 ml
1 oz = 480 grain =	30 gm	1 pint = 20 fl oz =	600 ml
1 lb =	454 gm	1 quarts = 2 pints =	1200 ml
		1 gallon = 4 quarts	4.5 L

House hold measurements	Imperial system	Metric system
1 drop =	1 minims	0.04 ml
1 tea spoonful =	1 fl dr	4-5 ml
1 dessert spoonful =	2 fl dr	8-10 ml
1 table spoonful =	4 fl dr	15 ml
1 wine glassful =	2 fl oz	60 ml
1 tea cupful	4 fl oz	120 ml
1 tumblerful	8 fl oz	240 ml