Square metric area unit.
Square Kilometers to Roods Converter — km2 to rood
Convert Square Kilometer (km2) to Rood (rood) using the exact conversion factor (1 square kilometer = 988.4215259 rood). See the formula, worked examples, conversion table, history, and common uses.
Square Kilometers to Roods 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.
A rood is one quarter of an acre.
Result = input x 1e+6 / 1011.714106.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Square Kilometers to Roods
Comparing Square Kilometer and Rood 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. Square Kilometer is most often used for national and regional land-area statistics.
Formula
roods = square kilometers × 988.421525869
This factor comes from each unit's defined relationship to the category's base unit: 1 square kilometer equals 1000000 base units, and 1 rood equals 1011.7141056 base units, so dividing one by the other gives the direct square kilometer-to-rood factor of 988.421525869.
Simple example
1 km2 × 988.4215259 = 988.4215259 rood
1 square kilometer = 988.4215259 roods.
Real-world example
10 km2 × 988.4215259 = 9,884.215259 rood
10 square kilometers = 9,884.215259 roods.
Conversion table
| Square Kilometer (km2) | Rood (rood) |
|---|---|
| 1 km2 | 988.4215259 rood |
| 5 km2 | 4,942.107629 rood |
| 10 km2 | 9,884.215259 rood |
| 25 km2 | 24,710.53815 rood |
| 50 km2 | 49,421.07629 rood |
| 100 km2 | 98,842.15259 rood |
Reverse conversion: Rood to Square Kilometer
988.4215259 rood × 0.001011714106 = 1 km2
988.4215259 roods = 1 square kilometers.
square kilometers = roods × 0.0010117141056
For a page dedicated to this direction, see Rood to Square Kilometer.
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.
Understanding the Rood (rood)
A rood is one quarter of an acre.
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 roods are in 1 square kilometer?
1 square kilometer equals 988.4215259 roods, using the exact defined conversion factor rather than an estimate.
How do I convert square kilometer to rood?
Multiply the square kilometer value by 988.4215259. The converter above does this instantly to whatever precision you set.
How do I convert rood back to square kilometer?
Use the reverse factor: 1 rood equals 0.0010117141 square kilometers. You can also use the swap control in the converter above to flip the direction instantly.
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.
What is a rood?
Rood (rood) is a unit of area.
Is the square kilometer to rood conversion exact?
Yes. Both square kilometer and rood are defined by fixed standards rather than physical artifacts, so the factor of 988.4215259 used above is exact to as many digits as you choose to display.
Where is the square kilometer still used today?
Used worldwide for city, region, and country-scale area reporting.