Convert square miles to hectares

Explanation

From this page you can convert square miles to hectares (or sq mi to ha) simply, by using the application above.

In case you are wondering, to convert from square miles to hectares you need to multiply by 258.9988. This factor is calculated using the respective definitions of the two units you can find below.

Formula

1 sq mi≈258.9988 ha

square milessq mi

dimension	area
symbol	sq mi, mi²
search alias	mi2, sqmi

The square mile (sq mi, mi²) is a derived unit of area in the international mass and length units.

Definition of the square mile

One square mile is the superficial area equivalent to that of a square each side of which measures one mile.

Value

One square mile is equal to 640 imperial acres.

From the Weights and Measures Act of 1985: PART VI: Measurement of area

Value in terms of the SI

One square mile is equivalent to 2.589988110336 square kilometers.

Equivalences

One square mile is also equivalent to:

Some Facts

The mean home range of an adult snow leopard in the Gobi desert can go up to 100 square miles (259 square kilometers) for a male and 64 square miles (166 square kilometers) for a female.
The Manhattan borough is the smallest of the five boroughs of New York City with a land area of 22.7 square miles (59 square kilometers).

hectaresha

dimension	area
symbol	ha

The hectare (ha) is a metric unit of area accepted for use with the SI.

It is widely used throughout the world to measure large areas of land.

Definition of the hectare

One hectare is equal to 10000 square meters.

The International System of Units 9^th edition p. 145

Equivalences

One hectare is equivalent to:

Some Facts

The Amazon rainforest covers 550 million hectares, at least for now. Everywhere in the Amazonian basin the forest is cleared to make space for agriculture and cattle pasture.

It's not a fatality though, deforestation can be prevented by adopting a few good habits.

Prefix

hecto

10²

The prefix hecto- comes from the Greek hekatón meaning a hundred. The associated multiplicative factor is 100 or 10².

square inch	sq in
square foot	sq ft	144 square inches
square yard	sq yd	9 square feet
square mile	sq mi	3 097 600 square yards

centiare	ca	0.01
deciare	da	0.1
are	a	1
decare	daa	10
hectare	ha	100