The conversion formula for grams (kg) to pounds (lb) conversions is as follows:

• 1 gram = 0.00220462262 pounds

The conversion formula for pounds (lb) to grams (kg) conversions is as follows:

• 1 pound = 453.59237 grams

The gram was the original base weight unit of the metric system being defined in 1795 as "the absolute weight of a volume of water equal to the cube of the hundredth part of the metre, at the temperature of melting ice" or the weight of a cubic centimetre of water at 0 degrees celsius in simpler parlance.

Unit System

SI Metric

Definition

The gram is now defined as being a one thousandth part of a kilogram.

Base Unit

kilogram

The gram was originally the base weight unit of the metric system but this changed as for most commercial use the gram was too small a unit.

Abbreviation

Formal: g

Using alternate abbreviations for the gram such a gm could lead to confusion and as such is not recommended.

Information

The gram was the original base unit of weight in the French metric system and was originally defined in 1795 as "the absolute weight of a volume of water equal to the cube of the hundredth part of the metre, at the temperature of melting ice".

The gram was considered too small to be the base unit and use of the kilogram was much more common in commercial and scientific applications and thus in 1799 a prototype kilogram was created out of platinum that then became the base unit.

In daily use, in many countries, the gram can be seen as a measurement on food labels and some higher value loose produce is sold at a price per 100 grams.

Global Adoption

Grams are recognised world wide although they are not often used outside of scientific applications in the United States.

Conversion Formulae

• 1 gram = 1,000,000 micrograms
• 1 gram = 1,000 milligrams
• 1 gram = 100 centigrams
• 1 gram = 10 decigrams
• 1 gram = 0.1 decagrams
• 1 gram = 0.01 hectograms
• 1 gram = 0.001 kilograms
• 1 gram = 0.000001 megagrams

 

• 1 microgram = 0.000001 grams
• 1 milligram = 0.001 grams
• 1 centigram = 0.01 grams
• 1 decigram = 0.1 grams
• 1 decagram = 10 grams
• 1 hectogram = 100 grams
• 1 kilogram = 1,000 grams
• 1 megagram = 1,000,000 grams

The pound is the base unit of the avoirdupois weight system and since the International Pound and Yard agreement of 1959 has been defined in terms of the SI metric kilogram.

The pound has it roots in Roman weights and the avoirdupois pound (as opposed to the Troy and obsolete pounds) has been in use in Britain from about 1300 AD, at that time it was also called the wool pound.

Unit System

Avoirdupois - British Imperial & US Customary

Definition

The pound is defined as 0.45359237 kilograms following the International Yard and Pound Agreement of 1959.

Base Unit

Kilogram - however the pound is the base unit of the avoirdupois weight system.

Abbreviation

Formal: lb

Alternates: lbs, lbm

lbs is often seen for a number of pounds above one and lbm is used to indicate pound-mass in situations where mass does not necessarily equal weight.

Information

The avoirdupois pound that is currently in use in the USA and is also used informally in Britain and various British Commonwealth countries has its roots in the Roman weight the libra. From about 1300 AD the avoirdupois pound (sometimes referred to as the wool pound in England) came into general use and before the reign of Elizabeth the first was equivalent to 6,992 troy grains.

An act of parliament in Elizabethan times redefined the pound as 7,000 troy grains and standards were produced to be held by the treasury.

The pound escaped any change under the Weights and Measures act of 1824 and has remained the same as in the times of Elizabeth the first. It is used as the basis for the British Imperial system of weights and the US Customary system of weights, that split off from the British system at the time of US Independence.

Following the Act of 1824 another standard pound was produced, after a fire at the Houses of Parliament, this was a platinum cylinder which remained the formal definition of the pound until the 1963 Weights and Measures Act that introduced the current definition of the pound in terms of the metric kilogram.

An 1878 Weights and Measures Act had defined the kilogram for use in British law as being 453.59265 grams. This was legally refined to 0.45359243 kilograms in 1898. The 1963 Weights and Measures act reversed the legal relationship between the pound and the kilogram in Britain defining the pound in terms of the kilogram.

Global Adoption

The pound is in statutory use in the United States and is informally used in the United Kingdom and British Commonwealth countries, such as Australia, Cannada, Jamaica, New Zealand and South Africa.

Conversion Formulae

To/From British Imperial Units

• 1 pound = 7,000 grains
• 1 pound = 256 drams
• 1 pound = 16 ounces
• 1 pound = 0.07142857 stones
• 1 pound = 0.03571429 quarters
• 1 pound = 0.00892857 hundredweight
• 1 pound = 0.00044643 tons

 

• 1 grain = 0.00014286 pounds
• 1 dram = 0.00390625 pounds
• 1 ounce = 0.0625 pounds
• 1 stone = 14 pounds
• 1 quarter = 28 pounds
• 1 hundredweight = 112 pounds
• 1 ton = 2,240 pounds

To/From US Customary Units

• 1 pound = 7,000 grains
• 1 pound = 256 drams
• 1 pound = 16 ounces
• 1 pound = 0.04 quarters
• 1 pound = 0.01 hundredweight
• 1 pound = 0.0005 tons

 

• 1 grain = 0.00014286 pounds
• 1 dram = 0.00390625 pounds
• 1 ounce = 0.0625 pounds
• 1 quarter = 25 pounds
• 1 hundredweight = 100 pounds
• 1 ton = 2,000 pounds

To/From Metric Units

• 1 pound = 453,592,370 micrograms
• 1 pound = 453,592.37 milligrams
• 1 pound = 45,359.237 centigrams
• 1 pound = 4,535.9237 decigrams
• 1 pound = 453.59237 grams
• 1 pound = 45.359237 decagrams
• 1 pound = 4.5359237 hectograms
• 1 pound = 0.45359237 kilograms
• 1 pound = 0.00045359237 megagrams

 

• 1 microgram = 0.00000000220462262 pounds
• 1 milligram = 0.00000220462262 pounds
• 1 centigram = 0.0000220462262 pounds
• 1 decigram = 0.000220462262 pounds
• 1 gram = 0.00220462262 pounds
• 1 decagram = 0.0220462262 pounds
• 1 hectogram = 0.220462262 pounds
• 1 kilogram = 2.20462262 pounds
• 1 megagram = 2,204.62262 pounds

g	lb
10	0.02
20	0.04
30	0.07
40	0.09
50	0.11
60	0.13
70	0.15
80	0.18
90	0.20
100	0.22

g	lb
110	0.24
120	0.26
130	0.29
140	0.31
150	0.33
160	0.35
170	0.37
180	0.40
190	0.42
200	0.44

g	lb
210	0.46
220	0.49
230	0.51
240	0.53
250	0.55
260	0.57
270	0.60
280	0.62
290	0.64
300	0.66

g	lb
310	0.68
320	0.71
330	0.73
340	0.75
350	0.77
360	0.79
370	0.82
380	0.84
390	0.86
400	0.88

g	lb
410	0.90
420	0.93
430	0.95
440	0.97
450	0.99
460	1.01
470	1.04
480	1.06
490	1.08
500	1.10

g	lb
600	1.32
700	1.54
800	1.76
900	1.98
1,000	2.20
1,100	2.43
1,200	2.65
1,300	2.87
1,400	3.09
1,500	3.31

lb	g
1	453.59
2	907.18
3	1,360.78
4	1,814.37
5	2,267.96
6	2,721.55
7	3,175.15
8	3,628.74
9	4,082.33
10	4,535.92
11	4,989.52
12	5,443.11
13	5,896.70
14	6,350.29

lb	g
14	6,350.29
28	12,700.59
42	19,050.88
56	25,401.17
70	31,751.47
84	38,101.76
98	44,452.05
112	50,802.35

lb	g
25	11,339.81
50	22,679.62
75	34,019.43
100	45,359.24
125	56,699.05
150	68,038.86
175	79,378.66
200	90,718.47

•   Milligrams to Grains

•   Milligrams to Ounces

•   Grams to Ounces

•   Kilograms to Pounds

•   Lengths

•   Temperatures

•   Areas

•   Speeds

•   Volumes