Convert Hectare to Square Chain
Convert hectares to square chains instantly. 1 hectare = 24.7105381492 square chain — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Chain 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.
Square Chain
A square chain is an imperial unit of area equal to approximately 404.686 m². It equals 1/10 of an acre.
Derived by squaring the chain (66 feet or 22 yards). The chain was defined by Edmund Gunter in 1620 specifically so that 10 square chains equal exactly one acre.
Square chains appear in US Public Land Survey System (PLSS) records and historical English property documents. The 10-to-1 ratio with acres made early survey arithmetic easier.
Defined by Edmund Gunter in 1620 specifically for surveying convenience.
Hectare to Square Chain conversion formula
The relationship between hectares and square chains:
To convert hectares to square chains, multiply the value in hectares by 24.7105381492. To reverse, multiply square chains by 0.0404685642.
How to use this converter
Type a value into the calculator. The result in square chains 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 Chain to Hectare converter for the reverse direction.
Step-by-step: convert hectares to square chains
- Write down the value in hectares (ha).
- Multiply that value by the factor 24.7105381492.
- The product is the equivalent value in square chains (ch²).
- To reverse, multiply the square chain value by 0.0404685642.
Worked examples
Example 1 — Convert 1 ha to ch²:
1 × 24.7105381492 = 24.7105381492 ch²
Example 2 — Convert 100 ha to ch²:
100 × 24.7105381492 = 2471.0538149159 ch²
Real-world example — Coastal cruise distances
A 10-hectare coastal sailing route converts to a different value in square chains — useful for cruise operators who switch between maritime, aviation, and road-distance units depending on the leg of the trip.
10 ha × 24.7105381492 = 247.1053814916 ch²
Real-world example — Road-sign distances across systems
A 100-hectare road sign converts cleanly into square chains — exactly the conversion drivers planning trips abroad rely on when reading road signs in a different measurement system.
100 ha × 24.7105381492 = 2471.0538149159 ch²
Real-world example — Endurance race distances
A 50-hectare cycling or running race converts to a recognizable distance in square chains. Endurance athletes coming from a different measurement system use this conversion to compare training plans across regions.
50 ha × 24.7105381492 = 1235.5269074579 ch²
Hectare to Square Chain conversion table
Standard reference values for converting hectares to square chains:
| Hectare [ha] | Square Chain [ch²] |
|---|---|
| 0.01 | 0.2471053815 |
| 0.1 | 2.4710538149 |
| 1 | 24.7105381492 |
| 2 | 49.4210762983 |
| 3 | 74.1316144475 |
| 4 | 98.8421525966 |
| 5 | 123.5526907458 |
| 10 | 247.1053814916 |
| 20 | 494.2107629832 |
| 30 | 741.3161444748 |
| 40 | 988.4215259664 |
| 50 | 1235.5269074579 |
| 100 | 2471.0538149159 |
| 500 | 12355.2690745795 |
| 1000 | 24710.538149159 |
Frequently asked questions
How many square chains is 1 hectare?
How do I convert hectares to square chains?
How do I convert square chains back to hectares?
How many square chains is 100 hectares?
Popular area unit conversions
Convert Hectare to other area units
Show all Hectare conversions
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 = 24.7105381492 ch²) 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 Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.