TOOL/2021-12-22

Area Converter / Tool

Converts the entered unit of area to another unit.
(m², sq.in., Japanese units, ha, etc.)

Rounded to the fourteenth decimal place.

Metric system

	square millimeter	mm²
	square centimeter	cm²
	square meter	m²
	are	a
	hectare	ha
	square kilometre	km²

United States customary units / Imperial units

	square inch	sq.in.
	square foot	sq.ft.
	square yard	sq.yd.
	rood	ro
	acre	ac
	square mile	sq.mi.

Japanese units of measurement

	shaku	勺
	gō	合
	tsubo	坪
	se	畝
	tan	反
	chō	町
	jō	畳／帖

A number with many digits may appear as "1e9". This is the computer's exponential representation, where "e" is a power of 10.

1e3 = 10³ = 1,000

1e6 = 10⁶ = 1,000,000

1e9 = 10⁹ = 1,000,000,000

1e-3 = 10^-3 = 0.001

1e-6 = 10^-6 = 0.000001

1e-9 = 10^-9 = 0.000000001

Area conversion formula

Metric system

1 km^2 = 10^2 ha = 10^4 a = 10^6 m^2

1 m^2 = 10^4 cm^2 = 10^6 mm^2

United States customary units / Imperial units

1 sq \ mi = 640 ac

1 ac = 4 ro = 4840 sq \ yd

1 sq \ yd = 9 sq \ ft

1 sq \ ft = 144 sq \ in = 929.0304 cm^2

1 sq \ in = 645.16 mm^2

Japanese units of measurement

1\text{町} = 10\text{反} = 100\text{畝} = 3000\text{坪}

1\text{坪} = {\dfrac {400}{121}} m^2 \approx 3.305785 m^2

1\text{坪} = 10\text{合} = 100\text{勺}

1\text{畳／帖} = 1.62 m^2 \ (*)

*** About tatami mats (畳 / 帖 / jō)**
When written as “畳”, it is not always 1.62 m². There are various dimensions of tatami mats such as Edo-ma and Kyo-ma. I made ”Unit Converter: Tatami”, so please use it.

When written as “帖”, it is 1.62 m². The “畳 / 帖” written in the recent housing advertisement is 1.62 m².

Area Converter / Tool

Converts the entered unit of area to another unit.(m2, sq.in., Japanese units, ha, etc.)

Metric system

United States customary units / Imperial units

Japanese units of measurement

Area conversion formula

Metric system

United States customary units / Imperial units

Japanese units of measurement

Converts the entered unit of area to another unit.
(m², sq.in., Japanese units, ha, etc.)