The acre, a unit of area commonly used in the United States and the United Kingdom, traces its origins back to the Middle Ages. Historically, it was defined as the amount of land that could be plowed by a yoke of oxen in one day. Today, one acre is standardized to be exactly 43,560 square feet. To put that into perspective, an acre is roughly the size of an American football field, minus the end zones.
Interestingly, the term “acre” is derived from the Old English word “æcer,” meaning open field. Though primarily used in agriculture and land measurement, the acre is still employed in real estate to describe large residential or commercial properties, reflecting its enduring utility in real-world applications.
The hectare, a metric unit for measuring land area, is widely used around the globe, especially in agriculture, forestry, and land planning. Originating from France during the metric system’s inception in 1795, one hectare equates to 10,000 square meters (about 2.47 acres). Interestingly, the Great Barrier Reef Marine Park, one of the planet’s most extensive marine parks, spans about 344,400,000 hectares, illustrating the sheer magnitude that this unit can represent.
While it might seem specific to certain industries, the hectare is crucial in conservation efforts, playing a significant role in tracking deforestation and biodiversity loss worldwide. With global initiatives focusing on increasing protected areas, hectares have become a critical factor in ecological statistics and strategies, helping to foster a sustainable future.
| Acres | Hectares |
|---|---|
0
ac
|
0
ha
|
0.1
ac
|
0.0404686
ha
|
0.2
ac
|
0.0809372
ha
|
0.3
ac
|
0.121406
ha
|
0.4
ac
|
0.161874
ha
|
0.5
ac
|
0.202343
ha
|
0.6
ac
|
0.242812
ha
|
0.7
ac
|
0.28328
ha
|
0.8
ac
|
0.323749
ha
|
0.9
ac
|
0.364217
ha
|
1
ac
|
0.404686
ha
|
1.1
ac
|
0.445155
ha
|
1.2
ac
|
0.485623
ha
|
1.3
ac
|
0.526092
ha
|
1.4
ac
|
0.56656
ha
|
1.5
ac
|
0.607029
ha
|
1.6
ac
|
0.647498
ha
|
1.7
ac
|
0.687966
ha
|
1.8
ac
|
0.728435
ha
|
1.9
ac
|
0.768903
ha
|
2
ac
|
0.809372
ha
|
2.1
ac
|
0.849841
ha
|
2.2
ac
|
0.890309
ha
|
2.3
ac
|
0.930778
ha
|
2.4
ac
|
0.971246
ha
|
2.5
ac
|
1.01172
ha
|
2.6
ac
|
1.05218
ha
|
2.7
ac
|
1.09265
ha
|
2.8
ac
|
1.13312
ha
|
2.9
ac
|
1.17359
ha
|
3
ac
|
1.21406
ha
|
3.1
ac
|
1.25453
ha
|
3.2
ac
|
1.295
ha
|
3.3
ac
|
1.33546
ha
|
3.4
ac
|
1.37593
ha
|
3.5
ac
|
1.4164
ha
|
3.6
ac
|
1.45687
ha
|
3.7
ac
|
1.49734
ha
|
3.8
ac
|
1.53781
ha
|
3.9
ac
|
1.57828
ha
|
4
ac
|
1.61874
ha
|
4.1
ac
|
1.65921
ha
|
4.2
ac
|
1.69968
ha
|
4.3
ac
|
1.74015
ha
|
4.4
ac
|
1.78062
ha
|
4.5
ac
|
1.82109
ha
|
4.6
ac
|
1.86156
ha
|
4.7
ac
|
1.90202
ha
|
4.8
ac
|
1.94249
ha
|
4.9
ac
|
1.98296
ha
|
5
ac
|
2.02343
ha
|
5.1
ac
|
2.0639
ha
|
5.2
ac
|
2.10437
ha
|
5.3
ac
|
2.14484
ha
|
5.4
ac
|
2.1853
ha
|
5.5
ac
|
2.22577
ha
|
5.6
ac
|
2.26624
ha
|
5.7
ac
|
2.30671
ha
|
5.8
ac
|
2.34718
ha
|
5.9
ac
|
2.38765
ha
|
6
ac
|
2.42812
ha
|
6.1
ac
|
2.46858
ha
|
6.2
ac
|
2.50905
ha
|
6.3
ac
|
2.54952
ha
|
6.4
ac
|
2.59
ha
|
6.5
ac
|
2.63046
ha
|
6.6
ac
|
2.67093
ha
|
6.7
ac
|
2.7114
ha
|
6.8
ac
|
2.75187
ha
|
6.9
ac
|
2.79233
ha
|
7
ac
|
2.8328
ha
|
7.1
ac
|
2.87327
ha
|
7.2
ac
|
2.91374
ha
|
7.3
ac
|
2.95421
ha
|
7.4
ac
|
2.99468
ha
|
7.5
ac
|
3.03515
ha
|
7.6
ac
|
3.07561
ha
|
7.7
ac
|
3.11608
ha
|
7.8
ac
|
3.15655
ha
|
7.9
ac
|
3.19702
ha
|
8
ac
|
3.23749
ha
|
8.1
ac
|
3.27796
ha
|
8.2
ac
|
3.31843
ha
|
8.3
ac
|
3.35889
ha
|
8.4
ac
|
3.39936
ha
|
8.5
ac
|
3.43983
ha
|
8.6
ac
|
3.4803
ha
|
8.7
ac
|
3.52077
ha
|
8.8
ac
|
3.56124
ha
|
8.9
ac
|
3.60171
ha
|
9
ac
|
3.64217
ha
|
9.1
ac
|
3.68264
ha
|
9.2
ac
|
3.72311
ha
|
9.3
ac
|
3.76358
ha
|
9.4
ac
|
3.80405
ha
|
9.5
ac
|
3.84452
ha
|
9.6
ac
|
3.88499
ha
|
9.7
ac
|
3.92545
ha
|
9.8
ac
|
3.96592
ha
|
9.9
ac
|
4.00639
ha
|
10
ac
|
4.04686
ha
|
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