Conversion

Hectares to Square Miles Converter

1 hectare = 0.003861021585 mi². Enter any value to convert hectares (ha) to square miles (mi²), or use the table below for common values.

Results

1 ha =0.003861021585 mi²hectares → square miles

1 ha0.003861021585 mi²

1 mi²258.998811 ha

Formula: mi² = ha × 0.003861021585

1 ha in other units

1 ha in other units
Unit	Value
square meters (m²)	10,000
square kilometers (km²)	0.01
square inches (in²)	15,500,031
square feet (ft²)	107,639.1042
square yards (yd²)	11,959.90046
square miles (mi²)	0.003861021585
acres (ac)	2.471053815

Formula

mi² = ha × 0.003861021585

Example: 10 ha = 0.03861021585 mi². To convert the other way, use ha = mi² × 258.998811.

Quick mental estimate: multiply by about 0.0039.

Hectares to Square Miles conversion table

Hectares (ha)	Square Miles (mi²)
1 ha	0.003861021585 mi²
2 ha	0.007722043171 mi²
3 ha	0.01158306476 mi²
4 ha	0.01544408634 mi²
5 ha	0.01930510793 mi²
6 ha	0.02316612951 mi²
7 ha	0.0270271511 mi²
8 ha	0.03088817268 mi²
9 ha	0.03474919427 mi²
10 ha	0.03861021585 mi²
15 ha	0.05791532378 mi²
20 ha	0.07722043171 mi²
25 ha	0.09652553964 mi²
30 ha	0.1158306476 mi²
40 ha	0.1544408634 mi²
50 ha	0.1930510793 mi²
75 ha	0.2895766189 mi²
100 ha	0.3861021585 mi²
250 ha	0.9652553964 mi²
500 ha	1.930510793 mi²
1,000 ha	3.861021585 mi²

About hectares and square miles

The hectare is 10,000 m² (100 m × 100 m), the standard unit for farmland and forests in metric countries.

The square mile is 640 acres, used for large land areas such as counties and national parks in the US.

Other Area conversions

Square Miles → HectaresReverse conversion Square Meters → Square Milesm² → mi² Square Kilometers → Square Mileskm² → mi² Square Inches → Square Milesin² → mi² Square Feet → Square Milesft² → mi² Square Yards → Square Milesyd² → mi² Acres → Square Milesac → mi² Hectares → Square Metersha → m² Hectares → Square Kilometersha → km² Hectares → Square Inchesha → in² Hectares → Square Feetha → ft² Hectares → Square Yardsha → yd² Hectares → Acresha → ac

Frequently asked questions

How do I convert hectares to square miles?

Use the formula mi² = ha × 0.003861021585. For example, 10 ha = 0.03861021585 mi².

What is 1 hectare in square miles?

1 ha = 0.003861021585 mi².

How do I convert square miles back to hectares?

Use ha = mi² × 258.998811. 1 mi² = 258.998811 ha.