📏 Hectares to Square miles Converter
Convert hectares (ha) to square miles (mi²) instantly, with the formula, a worked example and a conversion table.
Quick answer: 1 hectare (ha) = 0.0038610216 square miles (mi²). Formula: mi² = ha × 0.0038610216.
Updated · Free · No sign-up · Works on any device
Hectares to Square miles Converter inputs
Result
Hectares to Square miles conversion table
| Hectares (ha) | Square miles (mi²) |
|---|---|
| 0.1 ha | 0.0003861022 mi² |
| 0.5 ha | 0.0019305108 mi² |
| 1 ha | 0.0038610216 mi² |
| 2 ha | 0.0077220432 mi² |
| 3 ha | 0.011583065 mi² |
| 5 ha | 0.019305108 mi² |
| 10 ha | 0.038610216 mi² |
| 20 ha | 0.077220432 mi² |
| 25 ha | 0.09652554 mi² |
| 50 ha | 0.19305108 mi² |
| 100 ha | 0.38610216 mi² |
| 1,000 ha | 3.8610216 mi² |
Other area conversions
How to convert hectares to square miles
Multiply the number of hectares by 0.0038610216 to get square miles: mi² = ha × 0.0038610216.
Example: 5 ha = 0.019305108 mi².
The hectare (ha) and the square mile (mi²) are both units of area. Need the opposite direction? Use the mi² to ha converter.
Popular conversions
Centimeter to InchInch to CentimeterFoot to MeterMeter to FootKilometer to MileMile to KilometerKilogram to PoundPound to KilogramCelsius to FahrenheitFahrenheit to CelsiusMilliliter to US cupUS cup to MilliliterLiter to US gallonUS gallon to LiterGram to OunceOunce to GramSquare foot to Square meterAcre to HectareKilometer per hour to Mile per hourMile per hour to Kilometer per hourMegabyte to GigabytePound per square inch to Bar
Metric and imperial units
The metric system (SI) is used by almost every country and by science worldwide. Its units scale by powers of ten – 1 kilometer is 1,000 meters, 1 meter is 100 centimeters – which makes conversions inside the system easy. The imperial and US customary systems (inches, feet, pounds, gallons) are still used daily in the United States and partly in the UK.
Since 1959 the inch has been defined as exactly 2.54 centimeters and the pound as exactly 0.45359237 kilograms, so conversions between the two systems are exact. Note that a US gallon (3.785 L) and an imperial gallon (4.546 L) are different – choose the right one above.
This converter covers 10 categories and 66 units: length, weight, temperature, volume, area, speed, time, data, energy, pressure.
Frequently asked questions
How many square miles are in a hectare?
1 hectare = 0.0038610216 square miles.
How do I convert hectares to square miles?
Use the formula mi² = ha × 0.0038610216. For example, 5 ha = 0.019305108 mi².
How do I convert square miles back to hectares?
1 square mile = 258.99881 hectares. Use the mi² to ha converter linked on this page.
Are these conversions exact?
Yes – all factors use the internationally defined values (for example 1 inch = 2.54 cm exactly, 1 pound = 0.45359237 kg exactly). Results are rounded to 8 significant digits for display.