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 |
decare | 4.0468564 Da | 8.0937128 Da | 12.1405693 Da | 16.1874257 Da | 20.2342821 Da | 24.2811385 Da | 28.3279949 Da | 32.3748514 Da | 36.4217078 Da | 40.4685642 Da | 44.5154206 Da | 48.5622770 Da | 52.6091335 Da | 56.6559899 Da | 60.7028463 Da | 64.7497027 Da | 68.7965591 Da | 72.8434156 Da | 76.8902720 Da | 80.9371284 Da | 84.9839848 Da | 89.0308412 Da | 93.0776977 Da | 97.1245541 Da | 101.1714105 Da | 105.2182669 Da | 109.2651233 Da | 113.3119798 Da | 117.3588362 Da | 121.4056926 Da | 125.4525490 Da | 129.4994054 Da | 133.5462619 Da | 137.5931183 Da | 141.6399747 Da | 145.6868311 Da | 149.7336875 Da | 153.7805440 Da | 157.8274004 Da | 161.8742568 Da | 165.9211132 Da | 169.9679696 Da | 174.0148261 Da | 178.0616825 Da | 182.1085389 Da | 186.1553953 Da | 190.2022517 Da | 194.2491082 Da | 198.2959646 Da | 202.342821 Da | 206.3896774 Da | 210.4365338 Da | 214.4833903 Da | 218.5302467 Da | 222.5771031 Da | 226.6239595 Da | 230.6708159 Da | 234.7176724 Da | 238.7645288 Da | 242.8113852 Da | 246.8582416 Da | 250.9050980 Da | 254.9519545 Da | 258.9988109 Da | 263.0456673 Da | 267.0925237 Da | 271.1393801 Da | 275.1862366 Da | 279.2330930 Da | 283.2799494 Da | 287.3268058 Da | 291.3736622 Da | 295.4205187 Da | 299.4673751 Da | 303.5142315 Da | 307.5610879 Da | 311.6079443 Da | 315.6548008 Da | 319.7016572 Da | 323.7485136 Da | 327.7953700 Da | 331.8422264 Da | 335.8890829 Da | 339.9359393 Da | 343.9827957 Da | 348.0296521 Da | 352.0765085 Da | 356.1233650 Da | 360.1702214 Da | 364.2170778 Da | 368.2639342 Da | 372.3107906 Da | 376.3576471 Da | 380.4045035 Da | 384.4513599 Da | 388.4982163 Da | 392.5450727 Da | 396.5919292 Da | 400.6387856 Da | 404.685642 Da |
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 | decares | acres | decares |
---|---|---|---|
1 | ≡ 4.04685642 | 6 | ≡ 24.28113852 |
2 | ≡ 8.09371284 | 7 | ≡ 28.32799494 |
3 | ≡ 12.14056926 | 8 | ≡ 32.37485136 |
4 | ≡ 16.18742568 | 9 | ≡ 36.42170778 |
5 | ≡ 20.2342821 | 10 | ≡ 40.4685642 |
The decare (/ˈdɛkɑːr/ or /ˈdɛkɛər/) is derived from deca and are, and is equal to 10 ares or 1000 square metres. It is used in Norway and in the former Ottoman areas of the Middle East and the Balkans (Bulgaria) as a measure of land area. Instead of the name "decare", the names of traditional land measures are usually used, redefined as one decare:
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
decare | Da | ≡ 1000 m2 | ≡ 1000 m2 | Metric system SI |
decares | acres | decares | acres |
---|---|---|---|
1 | ≡ 0.24710538161371 | 6 | ≡ 1.4826322896823 |
2 | ≡ 0.49421076322742 | 7 | ≡ 1.729737671296 |
3 | ≡ 0.74131614484114 | 8 | ≡ 1.9768430529097 |
4 | ≡ 0.98842152645485 | 9 | ≡ 2.2239484345234 |
5 | ≡ 1.2355269080686 | 10 | ≡ 2.4710538161371 |
acres | decares |
---|---|
1 | ≡ 4.0468564 |
0.2471054 | ≡ 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 …) |