| 4840 square yards | = 1 acre |
| 640 acres | = 1 square mile |
| 1 furlong x 1 chain | = 1 acre |
| 10 square chains | = 1 acre |
| 1210 square yards | = 1 rood |
| 1 pole x 1 pole | = 1 square pole (sometimes called a pole) |
| 40 (square) poles | = 1 rood |
| 1 furlong x 1 pole | = 1 rood |
| 4 roods | = 1 acre |
| A pole is the same length as a rod or a perch. |
| A rod or perch may also be a measure of area. |