Convert Hectares to Square miles
1 hectare is 0.003861 mi². One hectare is exactly 0.00386102158542 square miles.
One hectare is 0.0038610216 square miles. To convert hectares to square miles, multiply by 0.0038610216; to go the other way, divide by 0.0038610216 or multiply by 258.99881. The relation is exact but the figure is not: it is a rounding of a number that does not terminate, and it follows from NIST Office of Weights and Measures. 10,000 square meters, or about 2.471 acres.
Factor checked against the defining standard · How we check
- Hectares × 0.0038610216
1 * 0.0038610.004 mi²
1 hectare in every area unit
| Unit | Value | Exact factor |
|---|---|---|
| square inches | 15,500,031 sq in | × 15,500,031.0001 |
| square feet | 107,639.1042 sq ft | × 107,639.104167 |
| square yards | 11,959.90046 sq yd | × 11,959.900463 |
| acres | 2.471053815 ac | × 2.47105381467 |
| square meters | 10,000 m² | × 10,000 |
| square millimetres | 10,000,000,000 mm² | × 10,000,000,000 |
| square centimetres | 100,000,000 cm² | × 100,000,000 |
| square kilometres | 0.01 km² | × 0.01 |
| square miles | 0.003861021585 mi² | × 0.00386102158542 |
| hectares (as entered) | 1 ha | — |
Factors are entered by hand from NIST Office of Weights and Measures rather than derived from a units library, so the ones that terminate are exact rather than rounded.
The same converter answers this pair however it is written: ha to sqmi is how the symbols are typed on a keyboard with no superscript on it.
How do you convert hectares to square miles? The converter and the working
- 1.Take the measurement in hectares.
- 2.Multiply by 0.0038610216 — that is how many square miles fit in one hectare.
- 3.To go back the other way, divide by 0.0038610216, or multiply by 258.99881.
Worked example: 25 hectares to square miles
- Formula
- ha × 0.0038610216 = mi²
- Arithmetic
- 25 × 0.0038610216 = 0.1 mi²
- Answer
- 25 ha = 0.1 mi²
The factor is rounded for display; the figure above is computed from the full value.
Hectares to square miles conversion table
| Hectares | Square miles |
|---|---|
| 1 ha | 0.003861 mi² |
| 2 ha | 0.01 mi² |
| 3 ha | 0.01 mi² |
| 4 ha | 0.02 mi² |
| 5 ha | 0.02 mi² |
| 6 ha | 0.02 mi² |
| 7 ha | 0.03 mi² |
| 8 ha | 0.03 mi² |
| 9 ha | 0.03 mi² |
| 10 ha | 0.04 mi² |
| 12 ha | 0.05 mi² |
| 15 ha | 0.06 mi² |
| 20 ha | 0.08 mi² |
| 25 ha | 0.1 mi² |
| 50 ha | 0.19 mi² |
| 100 ha | 0.39 mi² |
| 200 ha | 0.77 mi² |
| 300 ha | 1.16 mi² |
| 500 ha | 1.93 mi² |
| 1000 ha | 3.86 mi² |
| 2000 ha | 7.72 mi² |
| 5000 ha | 19.31 mi² |
| 10000 ha | 38.61 mi² |
What is a hectare?
10,000 square meters, or about 2.471 acres. The metric unit of land area.
What is a square mile?
Exactly 640 acres — one section of the US Public Land Survey, the grid the Midwest is drawn on. 2.59 square kilometres, and the reason a rural address is often "section 12".
How many square miles are in a hectare?
One hectare is 0.0038610216 square miles. Going the other way, one square mile is 258.99881 hectares. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every area unit here
The whole group — 10 units with their symbols and the size of each one in square meters — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a hectare.
Cite this page
- APA
- Rule Calculator. (2026). Convert Hectares to square miles. Rule Calculator. https://rulecalculators.com/convert/hectare-to-square-mile
- MLA
- "Convert Hectares to square miles." Rule Calculator, August 16, 2026, https://rulecalculators.com/convert/hectare-to-square-mile.
- Chicago
- Rule Calculator. "Convert Hectares to square miles." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/hectare-to-square-mile.
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Questions people actually ask
- How many square miles are in a hectare?
- 0.0038610216. Exactly 640 acres — one section of the US Public Land Survey, the grid the Midwest is drawn on. 2.59 square kilometres, and the reason a rural address is often "section 12".
- How do I convert square miles back to hectares?
- Divide by 0.0038610216, or multiply by 258.99881 — they are the same operation.
Other area conversions
Square miles to hectares — the same conversion the other way.