Formula

kg = lb / 2.2

Quick Rough Maths

To get the Kilograms, divide the number of Pounds by 2.2

Pounds (lb) in 1 Kilogram

There are 2.2 Pounds in 1 Kilogram

Kilograms (kg) in 1 Pound

There are 0.45 Kilograms in 1 Pound

Symbol: **lb**

Unit System: Imperial

Unit System: Imperial

The pound is a unit of mass (acceptable for use as weight on Earth) and is part of the imperial system of units. It has the symbol lb.

Not to be confused with a number of other definitions, the most common is international avoirdupois pound. The avoirdupois pound is defined as exactly 0.45359237 kilograms and is divided into 16 avoirdupois ounces.

One of the most common uses of the pound is in measuring the mass / weight of human beings or animals. When introduced, sports athletes such as boxers or wrestlers are described by their weight in pounds before any other characteristic as it helps people visualise how big / powerful they are.

The unit pounds originated from the Roman ‘libra’ (hence the abbreviated ‘lb’). The libra, which is Latin for scales or balance, was an ancient Roman unit used to measure mass and was equivalent to approximately 328.9 grams. The libra was originally split into 12 ounces (or unciae).

Random fact: Some cannons, such as the Smoothbore cannon, are based on the imperial pounds of circular solid iron balls of the diameters that fit the barrels. For example, a cannon that fires 12-pound ball is called a twelve-pounder.

Symbol: **kg**

Unit System: SI

Unit System: SI

The kilogram is the base SI unit for mass (acceptable for use as weight on Earth). It uses the symbol kg.

It is the only SI base unit with the prefix as part of its name (kilo). The word is derived itself from the French 'kilogramme' which was itself built from the Greek 'χίλιοι' or 'khilioi' for 'a thousand' and the Latin 'gramma' for 'small weight'.

It is now used worldwide for weighing almost anything - and has quickly become commonly recognised and understood by the masses. It is sometimes shortened to 'kilo' which can cause confusion as the prefix is used across many other units.

In 1795 the kilogram was first used in English and was defined as the mass of one litre of water. This provided a simple definition but when used in practice it was difficult as trade and commerce often involved large items. Weighing a large object using large quantities of water was inconvenient and dangerous. As a result, an object made out of a single piece of metal was created equal to one kilogram. This platinum-iridium metal, called the International Prototype Kilogram, has been kept in Sèvres, France since 1889.

1lb = 0.45kg

2lb = 0.91kg

3lb = 1.36kg

4lb = 1.81kg

5lb = 2.27kg

6lb = 2.72kg

7lb = 3.18kg

8lb = 3.63kg

9lb = 4.08kg

10lb = 4.54kg

11lb = 4.99kg

12lb = 5.44kg

13lb = 5.9kg

14lb = 6.35kg

15lb = 6.8kg

16lb = 7.26kg

17lb = 7.71kg

18lb = 8.16kg

19lb = 8.62kg

20lb = 9.07kg

21lb = 9.53kg

22lb = 9.98kg

23lb = 10.43kg

24lb = 10.89kg

26lb = 11.79kg

27lb = 12.25kg

28lb = 12.7kg

29lb = 13.15kg

30lb = 13.61kg

31lb = 14.06kg

32lb = 14.51kg

33lb = 14.97kg

34lb = 15.42kg

35lb = 15.88kg

36lb = 16.33kg

37lb = 16.78kg

38lb = 17.24kg

39lb = 17.69kg

40lb = 18.14kg

41lb = 18.6kg

42lb = 19.05kg

43lb = 19.5kg

44lb = 19.96kg

45lb = 20.41kg

46lb = 20.87kg

47lb = 21.32kg

48lb = 21.77kg

49lb = 22.23kg

51lb = 23.13kg

52lb = 23.59kg

53lb = 24.04kg

54lb = 24.49kg

55lb = 24.95kg

56lb = 25.4kg

57lb = 25.85kg

58lb = 26.31kg

59lb = 26.76kg

60lb = 27.22kg

61lb = 27.67kg

62lb = 28.12kg

63lb = 28.58kg

64lb = 29.03kg

65lb = 29.48kg

66lb = 29.94kg

67lb = 30.39kg

68lb = 30.84kg

69lb = 31.3kg

70lb = 31.75kg

71lb = 32.21kg

72lb = 32.66kg

73lb = 33.11kg

74lb = 33.57kg

76lb = 34.47kg

77lb = 34.93kg

78lb = 35.38kg

79lb = 35.83kg

80lb = 36.29kg

81lb = 36.74kg

82lb = 37.19kg

83lb = 37.65kg

84lb = 38.1kg

85lb = 38.56kg

86lb = 39.01kg

87lb = 39.46kg

88lb = 39.92kg

89lb = 40.37kg

90lb = 40.82kg

91lb = 41.28kg

92lb = 41.73kg

93lb = 42.18kg

94lb = 42.64kg

95lb = 43.09kg

96lb = 43.54kg

97lb = 44kg

98lb = 44.45kg

99lb = 44.91kg