Convert Area from Square Miles to Hectares (mi² to ha)

Square Mile to Hectare Conversion Formula

Example

Let's convert 5 Square Mile (mi²) to Hectare (ha).

Using the formula:

Therefore, 5 Square Mile (mi²) is equal to 1294.9953083919397245 Hectare (ha).

How many square miles are in one hectare? One Hectare (ha) contains 0.0038610178489439853076 Square Miles (mi²) — the inverse of the factor above. Multiplying by 258.99906167838794489 takes you from square miles to hectares; multiplying by 0.0038610178489439853076 brings you back.

Put in words: one square mile equals 258.99906167838794489 hectares, so the square mile is the larger unit of this pair. Converting between them never changes the amount of area being measured — only the size of the unit you count it in.

What is a Square Mile (mi²)?

A square mile (mi²), with its plural form being square miles, is an imperial unit of area equal to 27,878,400 square feet (ft²).

Why is London's Financial Center Called the "Square Mile"?

The "Square Mile" is the famous nickname for the City of London, the historic heart and central financial district of London, England.

This nickname comes from its compact geographical area of just 1.12 square miles (2.90 km²).

Despite its small size, it remains a global hub for finance and business, home to landmarks like the Bank of England and the London Stock Exchange.

How Do You Convert Square Miles to Other Units?

Converting square miles to other units is essential for comparing land areas globally.

One square mile is equivalent to:

• 2.59 square kilometers (km²)
• 640 acres
• 259 hectares

This is especially useful when comparing data from countries that use the imperial system (like the United States) with those that use the metric system.

How is the Square Mile Used in the United States?

In the United States, the square mile is a fundamental unit in the Public Land Survey System (PLSS).

This system, used since 1785 to survey and sell land, is based on a grid. Here's how it works:

• Land is divided into square townships, each measuring six miles on each side.
• Each township is then divided into 36 sections.
• Each section measures exactly one square mile (or 640 acres).

What is a Hectare (ha)?

A hectare (ha) is a unit used to measure area in the metric system. In simple terms, one hectare is equal to 10,000 square meters.

It's primarily used for measuring large plots of land, making it a standard unit for agriculture, forestry, and urban planning worldwide.

For a quick conversion:

• 1 hectare = 10,000 square meters
• 1 hectare = 2.47 acres

How Big is a Hectare?

It can be tricky to picture a unit of measurement.

The easiest way to understand the size of a hectare is to imagine a square with sides that are 100 meters long. The area inside that square is exactly one hectare (100 m × 100 m = 10,000 m²).

Visualizing a Hectare: Real-World Examples

To put the size of a hectare into perspective, think about these common examples:

• An international rugby field is almost exactly one hectare in size.
• A professional soccer (football) pitch is slightly smaller, at around 0.71 hectares.
• It would take about 15 American football fields to cover one hectare.
• New York City's Times Square is approximately 1.1 hectares in size.

Hectare vs. Acre: What's the Difference?

The hectare and the acre are both units used to measure land, but they belong to different measurement systems and are not the same size.

The most significant difference is that the hectare is a metric unit, while the acre is part of the imperial system.

• Hectare: A metric unit equal to 10,000 square meters.
• Acre: An imperial unit equal to 4,840 square yards (or about 4,047 square meters).

A hectare is significantly larger than an acre. One hectare is equal to about 2.47 acres.

Where is the Hectare Used Globally?

While not an official SI unit, the hectare is the only named unit of area that is accepted for use with the International System of Units.

It is a primary measurement for land in legal and commercial contexts throughout most of the world, particularly in:

• The European Union
• Australia
• Canada
• Most of Asia and Africa

Its widespread adoption makes it a universal standard for land measurement. The major exception is the United States, which primarily uses the acre.

Square Mile to Hectare Conversion Table

Here are some quick reference conversions from Square Mile (mi²) to Hectare (ha):