Hectare to Square Mile Converter
Area · unit-converter
Convert Hectare to Square Mile with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use square-meter-based definitions (international feet / yard standards, acre, hectare, and regional units like pyeong/tsubo).
Calculator
From: Hectare (ha)
To: Square Mile (mi2)
About Hectare
The hectare is 10,000 square meters (100 m × 100 m). It is widely used for farmland, forests, and land registration outside the US.
About Square Mile
The square mile is an imperial and US customary unit of area equal to the area of a square one statute mile on a side. It is common for large land parcels and geography in the US and UK.
How to convert hectares to square miles
1 hectare is equal to 0.00386102158542 square mile:
1 ha = (10000 m² ÷ 2589988.110336 m²) mi2 = 0.00386102158542 mi2
Each hectare is defined as 10000 m² and each square mile as 2589988.110336 m², so one ha equals 10000 ÷ 2589988.110336 mi2 = 0.00386102158542 mi2.
Let a(ha) be the numeric value of the same area measured in Hectare (ha), and a(mi2) the value in Square Mile (mi2). Then:
a(mi2) = a(ha) × (10000 / 2589988.110336)
Equivalently, divide by how many ha fit into one mi2 (m² per mi2 divided by m² per ha):
a(mi2) = a(ha) ÷ 258.99881103360002
Or: square mile = hectare ÷ 258.99881103360002
Examples
Example #1: Convert 20 ha to square mile
20 ha = 20 ha × (10000/2589988.110336) mi2 = 0.0772204317 mi2
20 ha = 20 ha ÷ 258.99881103360002 = 0.0772204317 mi2
Example #2: Convert 50 ha to square mile
50 ha = 50 ha × (10000/2589988.110336) mi2 = 0.1930510793 mi2
50 ha = 50 ha ÷ 258.99881103360002 = 0.1930510793 mi2
Summary
To convert Hectare to Square Mile, multiply the value in ha by the ratio of square meters per ha divided by square meters per mi2. Equivalently: value_mi2 = value_ha × (10000 / 2589988.110336). Numerically, 1 ha equals 0.003861021585424458 mi2.
Relationship context
You are converting between metric (SI) (Hectares) and US customary / imperial (Square Miles). Metric area is decimal from the square meter; US/imperial units use feet, yards, miles, and acres tied to international feet (0.3048 m) and related definitions. The numeric factor used here is 3.861022e-3.
Conversion tables
| Hectare (ha) | Square Mile (mi2) |
|---|---|
| 0.1 | 0.0003861022 |
| 1 | 0.0038610216 |
| 2 | 0.0077220432 |
| 3 | 0.0115830648 |
| 4 | 0.0154440863 |
| 5 | 0.0193051079 |
| 6 | 0.0231661295 |
| 7 | 0.0270271511 |
| 8 | 0.0308881727 |
| 9 | 0.0347491943 |
| Hectare (ha) | Square Mile (mi2) |
|---|---|
| 10 | 0.0386102159 |
| 20 | 0.0772204317 |
| 30 | 0.1158306476 |
| 40 | 0.1544408634 |
| 50 | 0.1930510793 |
| 60 | 0.2316612951 |
| 70 | 0.270271511 |
| 80 | 0.3088817268 |
| 90 | 0.3474919427 |
| 100 | 0.3861021585 |