Square Chains (sq ch)
Area · Imperial
Main conversion
1 sq ch = 404.69 m² (0.040469 ha)
Description and history
The square chain (symbol sq ch) equals one tenth of an acre, or 404.69 square meters, a square with one Gunter's chain (20.117 meters) on each side.
Edmund Gunter introduced it in the 17th century for land surveying. Ten square chains make exactly one acre.
Reference conversions
| Unit | Equals |
|---|---|
| Square Meters (m²) | 1 sq ch = 404.69 m² |
| Hectares (ha) | 1 sq ch = 0.040469 ha |
| Are (a) | 1 sq ch = 4.0469 a |
| Acres (ac) | 1 sq ch = 0.1 ac |
| Square Kilometers (km²) | 1 sq ch = 0.00040469 km² |
