Convert Square Chains to Dunam
Convert Square Chains (ch²) to Dunam (dunam) instantly and accurately.
Conversion Formula
dunam = ch² × 0.4046856422
About Square Chains
A square chain (ch²) is a surveying unit equal to the area of a square with sides of one Gunter's chain (66 feet or ~20.12 m), approximately 404.69 m². Ten square chains equal exactly one acre, making it the natural subdivision unit in traditional land surveying. The US Public Land Survey System used chains to lay out townships and sections, and square chains appear throughout old legal property descriptions and government land grants across North America. One square chain equals exactly 16 square rods.
About Dunam
A dunam (also dönüm or donum) is a unit of land area equal to exactly 1,000 m², used across Turkey, Israel, Palestine, Jordan, Lebanon, Iraq, and former Ottoman Empire territories. One dunam equals one stremma and one decare. The modern metric dunam of 1,000 m² was standardised during the British Mandate period; older Ottoman dunams varied by region (approximately 919-1,600 m²). It remains the primary land measurement unit for agricultural and property records throughout the Middle East, with properties routinely listed in dunams in Israeli and Palestinian real estate.
Quick Reference Table
| Square Chains (ch²) | Dunam (dunam) |
|---|---|
| 1 ch² | 0.404686 dunam |
| 2 ch² | 0.809371 dunam |
| 5 ch² | 2.02343 dunam |
| 10 ch² | 4.04686 dunam |
| 25 ch² | 10.1171 dunam |
| 50 ch² | 20.2343 dunam |
| 100 ch² | 40.4686 dunam |