Convert Rood to Square Kilometer
Convert roods to square kilometers instantly. 1 rood = 0.0010117141 square kilometer — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Kilometer to Rood converter for the reverse conversion.
Units explained
Rood
A rood is an imperial unit of area equal to approximately 1011.71 m², or 1/4 of an acre. It was historically used in England and parts of the British Empire.
Defined as one-quarter of an acre; historically used in medieval English farming as the area one ox could plow in a day. The word relates to 'rod' as a measure of length used in plot dimensions.
Roods appear in historical English farming records, parish records, and old property deeds. The unit is functionally obsolete today.
Medieval English farming origin; standardized via the 1959 International Yard and Pound Agreement.
Square Kilometer
A square kilometer is a metric unit of area equal to 1,000,000 m² (one million square meters), or 100 hectares. It is used for measuring large land areas, regional geography, and country-scale statistics.
Derived by squaring the kilometer (1000 m). The kilo- prefix comes from the Greek 'chilioi' (thousand).
Square kilometers express the area of cities, districts, lakes, forests, and entire countries. India's total area is approximately 3,287,263 km². 1 km² equals 100 hectares or about 247.105 acres.
Kilometer has been part of the metric system since 1795.
Rood to Square Kilometer conversion formula
The relationship between roods and square kilometers:
To convert roods to square kilometers, multiply the value in roods by 0.0010117141. To reverse, multiply square kilometers by 988.4215258687.
How to use this converter
Type a value into the calculator. The result in square kilometers updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Square Kilometer to Rood converter for the reverse direction.
Step-by-step: convert roods to square kilometers
- Write down the value in roods (rood).
- Multiply that value by the factor 0.0010117141.
- The product is the equivalent value in square kilometers (km²).
- To reverse, multiply the square kilometer value by 988.4215258687.
Worked examples
Example 1 — Convert 1 rood to km²:
1 × 0.0010117141 = 0.0010117141 km²
Example 2 — Convert 100 rood to km²:
100 × 0.0010117141 = 0.1011714106 km²
Real-world example — Maritime exclusion zone
A 200-rood exclusion zone (a common maritime boundary) converts to a different value in square kilometers that's useful when describing the same zone in everyday land-distance units.
200 rood × 0.0010117141 = 0.2023428211 km²
Real-world example — Coastal cruise distances
A 10-rood coastal sailing route converts to a different value in square kilometers — useful for cruise operators who switch between maritime, aviation, and road-distance units depending on the leg of the trip.
10 rood × 0.0010117141 = 0.0101171411 km²
Real-world example — Road-sign distances across systems
A 100-rood road sign converts cleanly into square kilometers — exactly the conversion drivers planning trips abroad rely on when reading road signs in a different measurement system.
100 rood × 0.0010117141 = 0.1011714106 km²
Rood to Square Kilometer conversion table
Standard reference values for converting roods to square kilometers:
| Rood [rood] | Square Kilometer [km²] |
|---|---|
| 0.01 | 1.011714e-5 |
| 0.1 | 0.0001011714 |
| 1 | 0.0010117141 |
| 2 | 0.0020234282 |
| 3 | 0.0030351423 |
| 4 | 0.0040468564 |
| 5 | 0.0050585705 |
| 10 | 0.0101171411 |
| 20 | 0.0202342821 |
| 30 | 0.0303514232 |
| 40 | 0.0404685642 |
| 50 | 0.0505857053 |
| 100 | 0.1011714106 |
| 500 | 0.5058570528 |
| 1000 | 1.0117141056 |
Frequently asked questions
How many square kilometers is 1 rood?
How do I convert roods to square kilometers?
How do I convert square kilometers back to roods?
How many square kilometers is 100 roods?
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Imperial / US Customary (14 units)
Sources & references
Conversion factor (1 rood = 0.0010117141 km²) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.