Convert hectares to acres (survey)

Explanation

From this page you can convert hectares to acres (survey) (or ha to ac) simply, by using the application above.

In case you are wondering, to convert from hectares to acres (survey) you need to multiply by 2.471. This factor is calculated using the respective definitions of the two units you can find below.

Formula

1 ha≈2.471 ac

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.

Other Units Based on the Are

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

acres (survey)ac

dimension	area
system	U.S. customary units (USCS)
symbol	ac

The survey acre (ac) is a unit of area in the U.S. customary units.

Definition

A survey acre is an area equal to that of a one survey furlong by one survey chain rectangle.

Value

One survey acre is 160 square survey rods.

NIST Handbook 44 Specifications: Appendix C

Equivalences

One survey acre is equivalent to:

U.S. Survey area units

square foot	sq ft
square rod	sq rd	272.25 square feet
square chain	sq ch	16 square rods
acre	ac	10 square chains
section	-	640 acres
township	twp	36 sections