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# Area (square / circle)

Side length of square Area Diameter of circle
km km2 km
ha
a
m m2 m
cm cm2 cm
mm mm2 mm
nm b nm
mi (int.) mi2 (int.) mi (int.)
yd yd2 yd
ft ft2 ft
in in2 in
mi (US surv.) mi2 (U.S. surv.) mi (US surv.)
yd (US surv.) acre yd (US surv.)
ft (US surv.) rood ft (US surv.)
cir. in
mil cir. mil mil

The results have been rounded to significant digits.

This is a converter for the units of area. In addition the converter displays the side length of a square as well as the diameter of a circle that both have the same area, using various units for these lengths. Vice versa the calculation of the area is possible when the side length of the square or the diameter of the circle is given.

Usage: Type the size of the area (center column), the side length of the square (left column), or the diameter of the circle (right column) into the field with the corresponding unit. After a mouseclick on any free space of the window or on the "calculate" button you may read the result. Move the mouse over a unit to read its full name.
For another calculation you just have to type the new value. Or you click on the "reset" button before. Move the mouse over a unit or click on it to read its full name.

Example: How much is 1 acre (U.S. survey) in SI-units ? Type "1" into the field for "acre" in the center column. After a mouseclick on any free space of the window or on the "calculate" button you may read the result. 1 arce corresponds to an area of 4046.9 m2. This could be the area of a square with a side length of 63.615 m or of a circle with a diameter of 71.782 m.

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.

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Bernd Krüger, 2020
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