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 |
rood | 4.0000000 ro | 8.0000000 ro | 12.0000000 ro | 16.0000000 ro | 20.0000000 ro | 24.0000000 ro | 28.0000000 ro | 32.0000000 ro | 36.0000000 ro | 40.0000000 ro | 44.0000000 ro | 48.0000000 ro | 52.0000000 ro | 56.0000000 ro | 60.0000000 ro | 64.0000000 ro | 68.0000000 ro | 72.0000000 ro | 76.0000000 ro | 80.0000000 ro | 84.0000000 ro | 87.9999999 ro | 91.9999999 ro | 95.9999999 ro | 99.9999999 ro | 103.9999999 ro | 107.9999999 ro | 111.9999999 ro | 115.9999999 ro | 119.9999999 ro | 123.9999999 ro | 127.9999999 ro | 131.9999999 ro | 135.9999999 ro | 139.9999999 ro | 143.9999999 ro | 147.9999999 ro | 151.9999999 ro | 155.9999999 ro | 159.9999999 ro | 163.9999999 ro | 167.9999999 ro | 171.9999999 ro | 175.9999999 ro | 179.9999999 ro | 183.9999999 ro | 187.9999999 ro | 191.9999999 ro | 195.9999999 ro | 199.9999999 ro | 203.9999999 ro | 207.9999999 ro | 211.9999999 ro | 215.9999999 ro | 219.9999999 ro | 223.9999999 ro | 227.9999999 ro | 231.9999999 ro | 235.9999999 ro | 239.9999999 ro | 243.9999999 ro | 247.9999999 ro | 251.9999999 ro | 255.9999998 ro | 259.9999998 ro | 263.9999998 ro | 267.9999998 ro | 271.9999998 ro | 275.9999998 ro | 279.9999998 ro | 283.9999998 ro | 287.9999998 ro | 291.9999998 ro | 295.9999998 ro | 299.9999998 ro | 303.9999998 ro | 307.9999998 ro | 311.9999998 ro | 315.9999998 ro | 319.9999998 ro | 323.9999998 ro | 327.9999998 ro | 331.9999998 ro | 335.9999998 ro | 339.9999998 ro | 343.9999998 ro | 347.9999998 ro | 351.9999998 ro | 355.9999998 ro | 359.9999998 ro | 363.9999998 ro | 367.9999998 ro | 371.9999998 ro | 375.9999998 ro | 379.9999998 ro | 383.9999998 ro | 387.9999998 ro | 391.9999998 ro | 395.9999998 ro | 399.9999998 ro |
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 | roods | acres | roods |
---|---|---|---|
1 | = 3.9999999976278 | 6 | = 23.999999985767 |
2 | = 7.9999999952556 | 7 | = 27.999999983395 |
3 | = 11.999999992883 | 8 | = 31.999999981022 |
4 | = 15.999999990511 | 9 | = 35.99999997865 |
5 | = 19.999999988139 | 10 | = 39.999999976278 |
A rood /ˈruːd/ is an historic English and international inch-pound measure of area, as well as an archaic English measure of length.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
rood | ro | ≡ 1⁄4 ac | = 1011.7141056 m2 | Imperial/US |
roods | acres | roods | acres |
---|---|---|---|
1 | = 0.25000000014826 | 6 | = 1.5000000008896 |
2 | = 0.50000000029653 | 7 | = 1.7500000010378 |
3 | = 0.75000000044479 | 8 | = 2.0000000011861 |
4 | = 1.0000000005931 | 9 | = 2.2500000013344 |
5 | = 1.2500000007413 | 10 | = 2.5000000014826 |
acres | roods |
---|---|
1 | = 4.0000000 |
0.2500000 | = 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 …) |