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 millimetermm2
square centimetercm2
square meterm2
area
hectareha
square kilometrekm2

United States customary units / Imperial units

square inchsq.in.
square footsq.ft.
square yardsq.yd.
roodro
acreac
square milesq.mi.

Japanese units of measurement

shaku
tsubo
se
tan
chō
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

1km2=102ha=104a=106m21 km^2 = 10^2 ha = 10^4 a = 10^6 m^2
1m2=104cm2=106mm21 m^2 = 10^4 cm^2 = 10^6 mm^2

United States customary units / Imperial units

1sq mi=640ac1 sq \ mi = 640 ac
1ac=4ro=4840sq yd1 ac = 4 ro = 4840 sq \ yd
1sq yd=9sq ft1 sq \ yd = 9 sq \ ft
1sq ft=144sq in=929.0304cm21 sq \ ft = 144 sq \ in = 929.0304 cm^2
1sq in=645.16mm21 sq \ in = 645.16 mm^2

Japanese units of measurement

1=10=100=30001\text{町} = 10\text{反} = 100\text{畝} = 3000\text{坪}
1=400121m23.305785m21\text{坪} = {\dfrac {400}{121}} m^2 \approx 3.305785 m^2
1=10=1001\text{坪} = 10\text{合} = 100\text{勺}
1畳/帖=1.62m2 ()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.


Hirota Yano / Born in 1987. Programmer.
I am publishing a web tool I created as a hobby. It is free of charge, so please feel free to use it.
© HIROTA YANO