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.