Property areas stated in a NOS form must be expressed in metric terms.
Common expressions
1 rood (rd) = 40 perches (p) Imperial measurement
1 acre = 4 roods Imperial measurement
1 hectare (ha) = 10,000 sq. metres (m2) Metric measurement.
Conversion factors for imperial to metric
1 sq. foot (ft2) = 0.0929m2
1 perch = 25.2929m2
1 acre = 4046.86m2
1 acre = 0.404686ha.
Conversion of acres to hectares
Acres | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
---|---|---|---|---|---|---|---|---|---|---|
0 | 0.4047 | 0.8094 | 1.2141 | 1.6187 | 2.0234 | 2.4281 | 2.8328 | 3.2375 | 3.6422 | |
10 | 4.0469 | 4.4515 | 4.8562 | 5.2609 | 5.6656 | 6.0703 | 6.4750 | 6.8797 | 7.2843 | 7.6890 |
20 | 8.0937 | 8.4984 | 8.9031 | 9.3078 | 9.7125 | 10.1171 | 10.5218 | 10.9265 | 11.3312 | 11.7359 |
30 | 12.1406 | 12.5453 | 12.9499 | 13.3546 | 13.7593 | 14.1640 | 14.5687 | 14.9734 | 15.3781 | 15.7827 |
40 | 16.1874 | 16.5921 | 16.9968 | 17.4015 | 17.8062 | 18.2109 | 18.6155 | 19.0202 | 19.4249 | 19.8296 |
50 | 20.2343 | 20.6390 | 21.0437 | 21.4483 | 21.8530 | 22.2577 | 22.6624 | 23.0671 | 23.4718 | 23.8765 |
60 | 24.2811 | 24.6858 | 25.0905 | 25.4952 | 25.8999 | 26.3046 | 26.7093 | 27.1139 | 27.5186 | 27.9233 |
70 | 28.3280 | 28.7327 | 29.1374 | 29.5421 | 29.9467 | 30.3514 | 30.7561 | 31.1608 | 31.5655 | 31.9702 |
80 | 32.3749 | 32.7795 | 33.1842 | 33.5889 | 33.9936 | 34.3983 | 34.8030 | 35.2077 | 35.6123 | 36.0639 |
90 | 36.4217 | 36.8264 | 37.2311 | 37.6358 | 38.0405 | 38.4451 | 38.8498 | 39.2545 | 39.6592 | 40.0639 |
100 | 40.4686 | Hectares (four decimal places) |
Example
Convert 357 acres to hectares
3 x 40.4686 | = | 121.4058 | (300 acres) |
+ | 20.2343 | (50 acres) | |
+ | 2.8328 | (7 acres) | |
144.4729 | ha |
Expressed to four significant figures = 144.5 ha.
Conversion of roods and perches to square metres
1 rood (rd) = 40 perches (p)
1/4 perch = 6.3 m2
1/2 perch = 12.6 m2
3/4 perch = 19.0 m2
Roods | ||||
Perches | 0 | 1 | 2 | 3 |
0 | 1011.7 | 2023.4 | 3035.1 | |
1 | 25.3 | 1037.0 | 2048.7 | 3060.4 |
2 | 50.6 | 1062.3 | 2074.0 | 3085.7 |
3 | 75.9 | 1087.6 | 2099.3 | 3111.0 |
4 | 101.2 | 1112.9 | 2124.6 | 3136.3 |
5 | 126.5 | 1138.2 | 2149.9 | 3161.6 |
6 | 151.8 | 1163.5 | 2175.2 | 3186.9 |
7 | 177.0 | 1188.8 | 2200.5 | 3212.2 |
8 | 202.3 | 1214.1 | 2225.8 | 3237.5 |
9 | 227.6 | 1239.3 | 2251.1 | 3262.8 |
10 | 252.9 | 1264.6 | 2276.4 | 3288.1 |
11 | 278.2 | 1289.9 | 2301.6 | 3313.4 |
12 | 303.5 | 1315.2 | 2326.9 | 3338.7 |
13 | 328.8 | 1340.5 | 2352.2 | 3363.9 |
14 | 354.1 | 1365.8 | 2377.5 | 3389.2 |
15 | 379.4 | 1391.1 | 2402.8 | 3414.5 |
16 | 404.7 | 1416.4 | 2428.1 | 3439.8 |
17 | 430.0 | 1441.7 | 2453.4 | 3465.1 |
18 | 455.3 | 1467.0 | 2478.7 | 3490.4 |
19 | 480.6 | 1492.3 | 2504.0 | 3515.7 |
20 | 505.9 | 1517.6 | 2529.3 | 3541.0 |
21 | 531.1 | 1542.9 | 2554.6 | 3566.3 |
22 | 556.4 | 1568.2 | 2579.9 | 3591.6 |
23 | 581.7 | 1593.4 | 2605.2 | 3616.9 |
24 | 607.0 | 1618.7 | 2630.5 | 3642.2 |
25 | 632.3 | 1644.0 | 2655.7 | 3667.5 |
26 | 657.6 | 1669.3 | 2681.0 | 3692.8 |
27 | 682.9 | 1694.6 | 2706.3 | 3718.0 |
28 | 708.2 | 1719.9 | 2731.6 | 3743.3 |
29 | 733.5 | 1745.2 | 2756.9 | 3768.6 |
30 | 758.8 | 1770.5 | 2782.2 | 3793.9 |
31 | 784.1 | 1795.8 | 2807.5 | 3819.2 |
32 | 809.4 | 1821.1 | 2832.8 | 3844.5 |
33 | 834.7 | 1846.4 | 2858.1 | 3869.8 |
34 | 860.0 | 1871.7 | 2883.4 | 3895.1 |
35 | 885.2 | 1897.0 | 2908.7 | 3920.4 |
36 | 910.5 | 1922.3 | 2934.0 | 3945.7 |
37 | 935.8 | 1947.5 | 2959.3 | 3971.0 |
38 | 961.1 | 1972.8 | 2984.6 | 3996.3 |
39 | 986.4 | 1998.1 | 3009.8 | 4021.6 |
40 | 1011.7 | Square Metres (one decimal place) |
Example
Convert 2rd 26 1/2p to square metres
2681.0 | (2rd 26p) |
+ 12.6 | (1/2p) |
2693.6 | m2 |
Expressed to four significant figures = 2,694 m2.