Area Converter
Convert between area units
rate：1 dm² = 0.0001 are
Results in all units
20 dm²| Unit | Symbol | Value |
|---|---|---|
| Metric | ||
| Square kilometers | km² | 2e-7 |
| Hectares | ha | 0.00002 |
| Ares | are | 0.002 |
| Square meters | m² | 0.2 |
| Square decimeters | dm² | 20 |
| Square centimeters | cm² | 2,000 |
| Square millimeters | mm² | 200,000 |
| Imperial / US | ||
| Square miles | mi² | 7.722043e-8 |
| Acres | acre | 0.000049 |
| Square yards | yd² | 0.239198 |
| Square feet | ft² | 2.152782 |
| Square inches | in² | 310.00062 |
| Chinese traditional | ||
| Qing | 顷 | 0.000003 |
| Mu | 亩 | 0.0003 |
| Square chi | 平方尺 | 1.8 |
About Area Conversion
20 Square decimeters equals 0.002 Ares. The conversion rate is 1 dm² = 0.0001 are. You can switch to any other unit of this category above and see the result instantly.
This converter supports 15 units in total, including Square kilometers, Hectares, Ares, Square meters, and covers metric, imperial and Chinese traditional systems.
Area conversion is crucial in real estate, land planning, and agriculture. In China, "square meters" are used for housing, while in Western countries, "square feet" or "acres" are common. For agricultural land, Chinese farmers often use "mu" and "hectares".
All values follow internationally accepted definitions and are rounded to the decimals you choose. The calculation runs entirely in your browser, so nothing is uploaded or stored on a server.
History & Background
Area is the two-dimensional extension of length. Ancient agricultural societies relied heavily on land, so early area units were related to farming labor. The word "Acre" literally means "field" and was the amount of land a yoke of oxen could plow in one day.
Conversion Details
Area conversion is based on the square meter (m²).
Common conversions: 1 hectare = 10,000 m², 1 acre ≈ 4,046.86 m², 1 mu ≈ 666.67 m².