Hectares to square miles converter

Convert hectares (ha) to square miles (mi²).

Area converter

Instant conversion

Edit either value. Decimals and scientific notation supported.

From value

From unit

To value

mi²

To unit

CONVERSION

1 ha ≈ 0.003861021585 mi²

Display precision

Precision changes displayed rounding, not calculation accuracy.

FORMULAmi² = ha × 0.00386102158542446

FORMULA & EXAMPLES

How to convert Hectares to square miles

mi² = ha × 0.00386102158542446

Multiply the ha reading by 0.00386102158542446.

Worked examples

1 ha ≈ 0.003861021585 mi²

1 × 0.00386102158542446 ≈ 0.003861021585

100 ha ≈ 0.3861021585 mi²

100 × 0.00386102158542446 ≈ 0.3861021585

Frequently asked questions

Why is ha to mi² different from a length conversion?

Area factors scale with the square of the length factor. For example, 1 ft = 0.3048 m gives 1 ft² = 0.3048² m² = 0.09290304 m².

Hectares to square miles table

Fixed reference · Hectare to Square mile

Reference values use this page’s named pair and default context. Calculator precision and font settings do not change this table.

Hectare (ha)	Square mile (mi²)
0	0
0.1	0.0003861021585
0.5	0.001930510793
1	0.003861021585
2	0.007722043171
5	0.01930510793
10	0.03861021585
25	0.09652553964
50	0.1930510793
100	0.3861021585
1000	3.861021585

Table results use 10 significant figures; decimal formula coefficients use up to 15. Calculations use the unit definitions before rounding. Extra digits do not improve measurement accuracy.