square chain
Areaexact by definition
A square chain is exactly 404.68564224 square metres, one tenth of an acre. It is the unit that makes surveyor's arithmetic work: measure a parcel in chains, multiply, and divide by ten to get acres with no conversion constant anywhere in the calculation.
| 1 | 404.68564 |
Where the unit came from
This is the whole reason Gunter picked 66 feet for the chain. An acre had already been fixed at one furlong by one chain, and ten square chains landing exactly on an acre made the chain the only surveying instrument that decimalised an inconvenient system.
One square chain in every area unit
| 4.04686e+36 | microbarn (μb) | |
| 4.04686e+33 | millibarn (mb) | |
| 4.04686e+30 | barn (b) | |
| 4.04686e+20 | square nanometer (nm²) | |
| 404,686,000,000,000 | square micrometer (μm²) | |
| 798,657,000,000 | circular mil (cmil) | |
| 798,657,000 | thousand circular mils (kcmil) | |
| 404,686,000 | square millimeter (mm²) | |
| 4,046,860 | square centimeter (cm²) | |
| 627,264 | square inch (in²) | |
| 40,468.6 | square decimeter (dm²) | |
| 4,356 | square foot (ft²) | |
| 484 | square yard (yd²) | |
| 404.686 | square meter (m²) | |
| 122.417 | tsubo (tsubo) | |
| 16 | square rod (rd²) | |
| 4.04686 | are (a) | |
| 1 | square chain (ch²)this unit | |
| 0.404686 | dunam (dunam) | |
| 0.4 | rood (rood) | |
| 0.1 | acre (ac) | |
| 0.0404686 | hectare (ha) | |
| 0.000404686 | square kilometer (km²) | |
| 0.00015625 | square mile (mi²) |
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