Convert Hectare to Rood
Convert hectares to roods instantly. 1 hectare = 9.8842152587 rood — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Rood to Hectare converter for the reverse conversion.
Units explained
Hectare
A hectare is a metric unit of area equal to 10,000 square meters, or one square hectometer. It is the most widely used metric unit for land measurement worldwide.
Defined as 100 ares, equal to one square hectometer. The name was introduced in 1795 in France as part of the metric system.
Hectares are the standard unit for agricultural land measurement worldwide except in the US (which uses acres). 1 hectare equals 2.47105 acres. In India, hectares are used in modern agricultural census and land records alongside traditional regional units.
Adopted in France in 1795; standardized internationally through the SI system.
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.
Hectare to Rood conversion formula
The relationship between hectares and roods:
To convert hectares to roods, multiply the value in hectares by 9.8842152587. To reverse, multiply roods by 0.1011714106.
How to use this converter
Type a value into the calculator. The result in roods updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Rood to Hectare converter for the reverse direction.
Step-by-step: convert hectares to roods
- Write down the value in hectares (ha).
- Multiply that value by the factor 9.8842152587.
- The product is the equivalent value in roods (rood).
- To reverse, multiply the rood value by 0.1011714106.
Worked examples
Example 1 — Convert 1 ha to rood:
1 × 9.8842152587 = 9.8842152587 rood
Example 2 — Convert 100 ha to rood:
100 × 9.8842152587 = 988.4215258687 rood
Real-world example — Maritime exclusion zone
A 200-hectare exclusion zone (a common maritime boundary) converts to a different value in roods that's useful when describing the same zone in everyday land-distance units.
200 ha × 9.8842152587 = 1976.8430517373 rood
Real-world example — Coastal cruise distances
A 10-hectare coastal sailing route converts to a different value in roods — useful for cruise operators who switch between maritime, aviation, and road-distance units depending on the leg of the trip.
10 ha × 9.8842152587 = 98.8421525869 rood
Real-world example — Road-sign distances across systems
A 100-hectare road sign converts cleanly into roods — exactly the conversion drivers planning trips abroad rely on when reading road signs in a different measurement system.
100 ha × 9.8842152587 = 988.4215258687 rood
Hectare to Rood conversion table
Standard reference values for converting hectares to roods:
| Hectare [ha] | Rood [rood] |
|---|---|
| 0.01 | 0.0988421526 |
| 0.1 | 0.9884215259 |
| 1 | 9.8842152587 |
| 2 | 19.7684305174 |
| 3 | 29.6526457761 |
| 4 | 39.5368610347 |
| 5 | 49.4210762934 |
| 10 | 98.8421525869 |
| 20 | 197.6843051737 |
| 30 | 296.5264577606 |
| 40 | 395.3686103475 |
| 50 | 494.2107629343 |
| 100 | 988.4215258687 |
| 500 | 4942.1076293433 |
| 1000 | 9884.2152586866 |
Frequently asked questions
How many roods is 1 hectare?
How do I convert hectares to roods?
How do I convert roods back to hectares?
How many roods is 100 hectares?
Popular area unit conversions
Convert Hectare to other area units
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Metric / SI (15 units)
Imperial / US Customary (15 units)
US Survey (5 units)
Indian Subcontinent (16 units)
Other Regional (10 units)
Scientific / Physics (5 units)
Historical / Pre-metric European (6 units)
Sources & references
Conversion factor (1 ha = 9.8842152587 rood) 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.