Square Miles (mi²) to Hectares Converter
Enter a value to instantly convert between area units.
1 Square Mile = 258.9988 Hectare
Key Formulas
Acre → Square Foot
ft² = ac × 43560Square Foot → Acre
ac = ft² × 0.0000229568Hectare → Acre
ac = ha × 2.47105Acre → Hectare
ha = ac × 0.404686Formula
ha = mi² × 258.9988One square mile equals 258.999 hectares — since 1 mi² = 2.59 km² and 1 km² = 100 ha, then 1 mi² = 259 ha. International land brokers, agricultural investors, and conservation organizations frequently convert between these units when comparing land across different markets.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
A European investor noting 1 mi² = 259 ha for comparing US farmland to continental estates.
1 mi² = 259 ha
A vineyard broker converting 10 mi² (2590 ha) wine region to hectares for Old World buyer due diligence.
10 mi² = 2590 ha
An agricultural economist calculating 50 mi² (12,950 ha) commodity crop region for international yield comparison.
50 mi² = 12950 ha
A conservation organization converting 100 mi² (25,900 ha) wildlife corridor for global biodiversity reporting.
100 mi² = 25900 ha