# Area 2

 SI (metric): km2 ha a m2 cm2
 Imperial, U.S. customary: mi2 a. yd2 ft2 in2
 U.S. survey: township mi2 a. rood square chain square perch yd2 ft2 in2

The results have been rounded to significant digits.

This is a converter for units of area. Non-decimal units are partitioned into the correspondig subunits.
The values of the Imperial system in the United Kingdom and in the U.S. customary system are the same (e.g. international inch). In the U.S.A. the U.S. survey-system is still in use for land survey. These areas are a little larger.

Usage: Type the known values into the fields in front of the corresponding units. After a mouseclick on any free space of the window or on the "calculate" button the calculation is performed. Read the result.
In the non-metric unit systems you may choose the units for display by a click on the corresponding checkbox. Units not chosen have a darker background. The calculated area is the sum of all displayed values in a system. The smallest unit in each system is displayed with decimal partitioning, if needed. The values in the SI-units (km2, ha, a, m2, cm2) each correspond to the total calculated area.
Move the mouse over a unit to read its full name. For another calculation just change the input values or you may click the "reset" button, eventually. A previous choice of units is not reset by this.

Example: You want to convert 3 hectare into acre and square yard in the U.S. survey system. In the area for the U.S. survey units choose a. and yd2 to be displayed. Type "3" into the field in front of "ha". After a mouseclick on any free space of the window or on the "calculate" button you can read the result. 3 ha corresponds to 7 acre and 1999.6 yd2. In U. S. customary units this would be 7 acre and 1999.7 yd2.

Remarks:
- Large and small numbers are written exponentially. As example 2.3e5 = 2.3⋅105 = 230000 or 4.5e-5 = 4.5⋅10-5 = 0.000045.
- There is no warranty for the conversion. Cactus2000 is not responsible for damage of any kind caused by wrong results.
- Please send an email if you have suggestions or if you would like to see more conversions to be included.