Square Mile to Hectare Converter (mi² to ha)

How to Convert Square Mile to Hectare

Formula: Hectare = Square Mile × 258.998811

Example: 1 mi² = 258.998811 ha

You can also use the interactive converter above. Simply enter any Square Mile value and the equivalent Hectare value will appear instantly. Click the ⇄ button to reverse the conversion.

A little context on Square Mile and Hectare helps this conversion stick, along with some frequently asked questions below.

Step-by-step example — Convert 1 mi² to ha:

What is Square Mile and Hectare?

A Square Mile (sq mi) is a large imperial area unit equal to a 1 mi by 1 mi square, used for measuring big regions in the US and UK.

A Hectare (ha) is a metric unit of area equal to 10,000 square meters, used worldwide for land measurement.

Real World Uses of Square Mile to Hectare Conversion

• Square Mile: Commonly used for stating population density per square mile.
• Hectare: Commonly used for reporting forest, park and conservation area in metric countries.
• Square Mile: Commonly used in the US and UK to state the size of cities, counties and large land areas.
• Hectare: Commonly used worldwide for agricultural land, forests and conservation areas.

Frequently Asked Questions

What is the formula to convert Square Mile to Hectare?

The formula is: Hectare = Square Mile x 258.998811. Multiply any Square Mile value by 258.998811 to get the equivalent in Hectare.

What is 1 Square Mile in Hectare?

1 sq mi = 258.998811 ha.

How many Square Mile are in 1 Hectare?

1 ha = 0.00386102158592535 sq mi.

Is Square Mile bigger or smaller than Hectare?

Square Mile is bigger than Hectare. 1 Square Mile = 258.998811 ha.

What is 5 mi² in ha?

5 mi² = 1,294.994055 ha.

What is 10 ha in mi²?

10 ha = 0.03861021586 mi².

How many acres are in a square mile?

A square mile equals exactly 640 acres — this is the basis of the US Public Land Survey System used to divide farmland across rural America.