acre | 1 ac | 2 ac | 3 ac | 4 ac | 5 ac | 6 ac | 7 ac | 8 ac | 9 ac | 10 ac | 11 ac | 12 ac | 13 ac | 14 ac | 15 ac | 16 ac | 17 ac | 18 ac | 19 ac | 20 ac | 21 ac | 22 ac | 23 ac | 24 ac | 25 ac | 26 ac | 27 ac | 28 ac | 29 ac | 30 ac | 31 ac | 32 ac | 33 ac | 34 ac | 35 ac | 36 ac | 37 ac | 38 ac | 39 ac | 40 ac | 41 ac | 42 ac | 43 ac | 44 ac | 45 ac | 46 ac | 47 ac | 48 ac | 49 ac | 50 ac | 51 ac | 52 ac | 53 ac | 54 ac | 55 ac | 56 ac | 57 ac | 58 ac | 59 ac | 60 ac | 61 ac | 62 ac | 63 ac | 64 ac | 65 ac | 66 ac | 67 ac | 68 ac | 69 ac | 70 ac | 71 ac | 72 ac | 73 ac | 74 ac | 75 ac | 76 ac | 77 ac | 78 ac | 79 ac | 80 ac | 81 ac | 82 ac | 83 ac | 84 ac | 85 ac | 86 ac | 87 ac | 88 ac | 89 ac | 90 ac | 91 ac | 92 ac | 93 ac | 94 ac | 95 ac | 96 ac | 97 ac | 98 ac | 99 ac | 100 ac |
hectare | 0.4046856 ha | 0.8093713 ha | 1.2140569 ha | 1.6187426 ha | 2.0234282 ha | 2.4281139 ha | 2.8327995 ha | 3.2374851 ha | 3.6421708 ha | 4.0468564 ha | 4.4515421 ha | 4.8562277 ha | 5.2609133 ha | 5.6655990 ha | 6.0702846 ha | 6.4749703 ha | 6.8796559 ha | 7.2843416 ha | 7.6890272 ha | 8.0937128 ha | 8.4983985 ha | 8.9030841 ha | 9.3077698 ha | 9.7124554 ha | 10.1171411 ha | 10.5218267 ha | 10.9265123 ha | 11.3311980 ha | 11.7358836 ha | 12.1405693 ha | 12.5452549 ha | 12.9499405 ha | 13.3546262 ha | 13.7593118 ha | 14.1639975 ha | 14.5686831 ha | 14.9733688 ha | 15.3780544 ha | 15.7827400 ha | 16.1874257 ha | 16.5921113 ha | 16.9967970 ha | 17.4014826 ha | 17.8061682 ha | 18.2108539 ha | 18.6155395 ha | 19.0202252 ha | 19.4249108 ha | 19.8295965 ha | 20.2342821 ha | 20.6389677 ha | 21.0436534 ha | 21.4483390 ha | 21.8530247 ha | 22.2577103 ha | 22.6623960 ha | 23.0670816 ha | 23.4717672 ha | 23.8764529 ha | 24.2811385 ha | 24.6858242 ha | 25.0905098 ha | 25.4951954 ha | 25.8998811 ha | 26.3045667 ha | 26.7092524 ha | 27.1139380 ha | 27.5186237 ha | 27.9233093 ha | 28.3279949 ha | 28.7326806 ha | 29.1373662 ha | 29.5420519 ha | 29.9467375 ha | 30.3514232 ha | 30.7561088 ha | 31.1607944 ha | 31.5654801 ha | 31.9701657 ha | 32.3748514 ha | 32.7795370 ha | 33.1842226 ha | 33.5889083 ha | 33.9935939 ha | 34.3982796 ha | 34.8029652 ha | 35.2076509 ha | 35.6123365 ha | 36.0170221 ha | 36.4217078 ha | 36.8263934 ha | 37.2310791 ha | 37.6357647 ha | 38.0404503 ha | 38.4451360 ha | 38.8498216 ha | 39.2545073 ha | 39.6591929 ha | 40.0638786 ha | 40.4685642 ha |
The acre is a unit of land area used in the imperial and US customary systems. It is defined as the area of 1 chain by 1 furlong (66 by 660 feet), which is exactly equal to 1⁄640 of a square mile, 43,560 square feet, approximately 4,047 m2, or about 40% of a hectare.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
acre | ac | ≡ 1 ch × 10 ch = 4840 sq yd | ≡ 4046.8564224 m2 | Imperial/US |
acres | hectares | acres | hectares |
---|---|---|---|
1 | ≡ 0.404685642 | 6 | ≡ 2.428113852 |
2 | ≡ 0.809371284 | 7 | ≡ 2.832799494 |
3 | ≡ 1.214056926 | 8 | ≡ 3.237485136 |
4 | ≡ 1.618742568 | 9 | ≡ 3.642170778 |
5 | ≡ 2.02342821 | 10 | ≡ 4.04685642 |
The hectare (/ˈhɛktɛər/ or /ˈhɛktɑːr/), although not a unit of SI, is the only named unit of area that is accepted for use within the SI. In practice the hectare is fully derived from the SI, being equivalent to a square hectometre. It is widely used throughout the world for the measurement of large areas of land, and it is the legal unit of measure in domains concerned with land ownership, planning, and management, including law (land deeds), agriculture, forestry, and town planning throughout the European Union. The United Kingdom, United States, Burma, and to some extent Canada instead use the acre.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
hectare | ha | ≡ 10000 m2 | ≡ 10000 m2 | Metric system SI |
hectares | acres | hectares | acres |
---|---|---|---|
1 | ≡ 2.4710538161371 | 6 | ≡ 14.826322896823 |
2 | ≡ 4.9421076322742 | 7 | ≡ 17.29737671296 |
3 | ≡ 7.4131614484114 | 8 | ≡ 19.768430529097 |
4 | ≡ 9.8842152645485 | 9 | ≡ 22.239484345234 |
5 | ≡ 12.355269080686 | 10 | ≡ 24.710538161371 |
acres | hectares |
---|---|
1 | ≡ 0.4046856 |
2.4710538 | ≡ 1 |
Symbol | Definition |
---|---|
≡ | exactly equal |
≈ | approximately equal to |
= | equal to |
digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |