acre(ac)
the acre is a unit of are in land measuring that is used in the imperial and US customary measure systems
one acre is an area of 22 yards multiple by 220 yards
one acre equals to
- = 1/640 of a square mile
- =43,560 square feet
- Roughly 4,046.856 square meter
- Roughly 40% of a hectare
There are 2 kinds of acre used in USA , The US survey acre and international acre
1 international acre equal to
- 4,046.8564224 square metres
- 0.40468564224 hectare (A square with 100 m sides has an area of 1 hectare.)
1 United States survey acre is equal to:
- 4,046.87261 square metres (1 square kilometre is equal to 247.105 acres)
- 0.404687261 hectare
barn(b)
the barn is a unit of area used in high-energy physics to express the cross sections of any scattering process
A barn is defined as 10_{−28} m2 and is approximately the cross-sectional area of a uranium nucleus.
hectare
The hectare is a area measure unit in the SI system
One hectare equal to 100 ares (10,000 m^{2}) and primarily used in the measurement of land
An acre is about 0.4047 hectare and one hectare contains about 2.47 acres
square foot
The square foot is an area measure unit used in imperial and U.S. customary system of unit
The square foot is used mainly in United States and partially in Canada, United Kingdom
One square foot is the area of square with sides of 1 foot
square inch
The square inch is a unit of area measurement and equal to the area of a square with sides of one inch
square kilometre
Square kilometre is the SI area measure unit, its symbol is km^{2} ,
It measure an area whose side is one meter.
One Square kilometre is equal to
- 1,000,000 square metres (m^{2})
- 100 hectares (ha)
One square is also approximately equal to:
- 0.3861 square miles
- 247.1 acres
square metre
The square metre is the SI derived unit of area measurement , its symbol is m^{2}
It is defined as the area of a square whose sides measure exactly one metre.
square yard
the square yard is a unit of area measurement in the imperial system of measurement
it is widely used in USA,UK and Canada
it is defined as the area whose side is a yard or 0.9144 metres
township
Survey township, also called Congressional township is used by the United StatesPublic Land Survey System
A Survey township is an area whose side is 6 miles