A rood is one quarter of an acre.
Roods to Square Kilometers Converter — rood to km2
Convert Rood (rood) to Square Kilometer (km2) using the exact conversion factor (1 rood = 0.0010117141 square kilometer). See the formula, worked examples, conversion table, history, and common uses.
Roods to Square Kilometers converter
Converter
Area Converter
Convert land, construction, mapping, survey, and scientific area units.
Context values
Some unit families need one extra value for a physically accurate result.
Square metric area unit.
Result = input x 1011.714106 / 1e+6.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Roods to Square Kilometers
Comparing Rood and Square Kilometer is common in agriculture and real estate, where US land is typically measured in acres and most of the rest of the world uses hectares. Specifically: A rood is one quarter of an acre, and square metric area unit.
Formula
square kilometers = roods × 0.0010117141056
This factor comes from each unit's defined relationship to the category's base unit: 1 rood equals 1011.7141056 base units, and 1 square kilometer equals 1000000 base units, so dividing one by the other gives the direct rood-to-square kilometer factor of 0.0010117141056.
Simple example
1 rood × 0.001011714106 = 0.0010117141 km2
1 rood = 0.0010117141 square kilometers.
Real-world example
10 rood × 0.001011714106 = 0.0101171411 km2
10 roods = 0.0101171411 square kilometers.
Conversion table
| Rood (rood) | Square Kilometer (km2) |
|---|---|
| 1 rood | 0.0010117141 km2 |
| 5 rood | 0.0050585705 km2 |
| 10 rood | 0.0101171411 km2 |
| 25 rood | 0.0252928526 km2 |
| 50 rood | 0.0505857053 km2 |
| 100 rood | 0.1011714106 km2 |
Reverse conversion: Square Kilometer to Rood
0.0010117141 km2 × 988.4215259 = 0.9999999945 rood
0.0010117141 square kilometers = 0.9999999945 roods.
roods = square kilometers × 988.421525869
For a page dedicated to this direction, see Square Kilometer to Rood.
Understanding the Rood (rood)
A rood is one quarter of an acre.
Understanding the Square Kilometer
Square Kilometer (km2) measures area. A square kilometer is one million square meters — the area of a 1 km × 1 km square. It is classified as a SI derived (metric prefix) unit.
Where it's used: Used worldwide for city, region, and country-scale area reporting.
Uses of the Square Kilometer today
- National and regional land-area statistics
- City and urban planning at large scale
- Geography and cartography
History of the Square Kilometer
Like other metric-prefixed area units, the square kilometer follows automatically from the kilometer once the meter was standardized in the 1790s French metric reform.
Historical origin. Square Kilometer was not the invention of a single named person; it developed through the process described above.
Square Kilometer — sources
- BIPM SI Brochure — Coherent derived units — Basis for metric-prefixed area units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many square kilometers are in 1 rood?
1 rood equals 0.0010117141 square kilometers, using the exact defined conversion factor rather than an estimate.
How do I convert rood to square kilometer?
Multiply the rood value by 0.001011714106. The converter above does this instantly to whatever precision you set.
How do I convert square kilometer back to rood?
Use the reverse factor: 1 square kilometer equals 988.4215259 roods. You can also use the swap control in the converter above to flip the direction instantly.
What is a rood?
Rood (rood) is a unit of area.
What is a square kilometer?
Square Kilometer (km2) measures area. A square kilometer is one million square meters — the area of a 1 km × 1 km square. It is classified as a SI derived (metric prefix) unit.
Is the rood to square kilometer conversion exact?
Yes. Both rood and square kilometer are defined by fixed standards rather than physical artifacts, so the factor of 0.001011714106 used above is exact to as many digits as you choose to display.