Hectares to Square miles converter

To convert hectares to square miles, enter the value in the first field. The result in square miles is calculated automatically using the exact conversion factor.

1 ha ≈ 0.00386102158542 mi²
1 mi² = 258.9988110336 ha

Formula: mi² ≈ ha × 0.00386102158542
ha = mi² × 258.9988110336

Definitions: 1 ha = 10000 m²; 1 mi² = 640 ac

The hectare (ha) is 10,000 square meters, the area of a square 100 m on each side. It is the standard unit for farmland and forests in most countries, while the United States uses acres.

The square mile (mi²) is 640 acres, about 2.59 square kilometers. It is used for the area of cities, counties, states and countries in the United States and the United Kingdom.

See the conversion table with commonly used values, handy for quick reference or study.