Formula

ha = ac / 2.47

Quick Rough Maths

To get the Hectares, divide the number of Acres by 2.5

Acres (ac) in 1 Hectare

There are 2.47 Acres in 1 Hectare

Hectares (ha) in 1 Acre

There are 0.4 Hectares in 1 Acre

Symbol: **ac**

Unit System: Imperial / US Customary

Unit System: Imperial / US Customary

The acre is a unit of area and is used in the imperial and US customary systems with the symbol a.

It represents the area the size of one chain by one furlong (66 by 660 feet). This is exactly equal to 10 square chains, 1⁄640 of a square mile or 43,560 square feet.

It is generally used to measure the size of land.

Symbol: **ha**

Unit System: Non-SI Metric

Unit System: Non-SI Metric

The hectare is a unit of area and is a non-SI but metric unit with the symbol ha.

It represents the area equal to that of a square with edges 100m long (ie 1hm² or 10,000m²). This is the equivalent to about 2.47 acres.

Its size is down to its use primary use; that for measuring the size of land.

1ac = 0.4ha

2ac = 0.81ha

3ac = 1.21ha

4ac = 1.62ha

5ac = 2.02ha

6ac = 2.43ha

7ac = 2.83ha

8ac = 3.24ha

9ac = 3.64ha

10ac = 4.05ha

11ac = 4.45ha

12ac = 4.86ha

13ac = 5.26ha

14ac = 5.67ha

15ac = 6.07ha

16ac = 6.47ha

17ac = 6.88ha

18ac = 7.28ha

19ac = 7.69ha

20ac = 8.09ha

21ac = 8.5ha

22ac = 8.9ha

23ac = 9.31ha

24ac = 9.71ha

26ac = 10.52ha

27ac = 10.93ha

28ac = 11.33ha

29ac = 11.74ha

30ac = 12.14ha

31ac = 12.55ha

32ac = 12.95ha

33ac = 13.35ha

34ac = 13.76ha

35ac = 14.16ha

36ac = 14.57ha

37ac = 14.97ha

38ac = 15.38ha

39ac = 15.78ha

40ac = 16.19ha

41ac = 16.59ha

42ac = 17ha

43ac = 17.4ha

44ac = 17.81ha

45ac = 18.21ha

46ac = 18.62ha

47ac = 19.02ha

48ac = 19.42ha

49ac = 19.83ha

51ac = 20.64ha

52ac = 21.04ha

53ac = 21.45ha

54ac = 21.85ha

55ac = 22.26ha

56ac = 22.66ha

57ac = 23.07ha

58ac = 23.47ha

59ac = 23.88ha

60ac = 24.28ha

61ac = 24.69ha

62ac = 25.09ha

63ac = 25.5ha

64ac = 25.9ha

65ac = 26.3ha

66ac = 26.71ha

67ac = 27.11ha

68ac = 27.52ha

69ac = 27.92ha

70ac = 28.33ha

71ac = 28.73ha

72ac = 29.14ha

73ac = 29.54ha

74ac = 29.95ha

76ac = 30.76ha

77ac = 31.16ha

78ac = 31.57ha

79ac = 31.97ha

80ac = 32.37ha

81ac = 32.78ha

82ac = 33.18ha

83ac = 33.59ha

84ac = 33.99ha

85ac = 34.4ha

86ac = 34.8ha

87ac = 35.21ha

88ac = 35.61ha

89ac = 36.02ha

90ac = 36.42ha

91ac = 36.83ha

92ac = 37.23ha

93ac = 37.64ha

94ac = 38.04ha

95ac = 38.45ha

96ac = 38.85ha

97ac = 39.25ha

98ac = 39.66ha

99ac = 40.06ha