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# Calculate the Area

Calculator for the area from length and width. For every size, a specific unit can be determined. If one length unit is chosen, then for length and width the same unit is used. With matching units, additionally a matching area unit is chosen, e.g. centimeter and square centimeter.

 Length: mm, millimetercm, centimeterdm, decimeterm, meterdam, decameterhm, hectometerkm, kilometer″, in, inch′, ft, footyd, yardac-lengthmi, mile Width: mm, millimetercm, centimeterdm, decimeterm, meterdam, decameterhm, hectometerkm, kilometer″, in, inch′, ft, footyd, yardac-lengthmi, mile Area: mm², square millimetercm², square centimeterdm², square decimeterm², square metera, areha, hectarekm², square kilometerin², square inchft², square footyd², square yardac, acremi², square mile

Round to    decimal places.

Please enter two values, the third will be calculated. Decameter (10 m) and hectometer (100 m), the matching length units to are and hectare, are very uncommon. The matching length unit to the acre is 63.614907234075253 meters (square root of 4046.8564224 m²) and is labeled here as ac-length.

The calculation of a rectangular area from length times width.

Example: a field with a length of 2 feet and a width of 10 inches has an area of 0.155 square meters.

If an area can be calculated as length times width, then it is always a rectangular area. If length and width are the same, then it is even a square one. This is where the square comes from in the units of area, such as the square meter.
Of course, areas with other shapes also have an area. That of a circle, for example, is the radius squared times the number pi. For other shapes, the calculation is sometimes more complicated or cannot be solved algebraically at all. One possibility is to fill the area with increasingly smaller rectangles or squares and then add up their individual areas. This is the procedure of infinitesimal calculus, which theoretically reaches infinitely small sections and thereby approaches the true value more and more. The volume of non-calculable bodies is determined in a similar way, only here of course with cuboids instead of rectangles. For three-dimensional structures, there is also the possibility of measurement via displacement, which was discovered by Archimedes. With areas, such a measurement is more difficult to arrange.

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