# 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.

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.

German: Dimension | Vielfacher Inhalt | Verhältnis | Diagonalen | Flächeninhalt | Rauminhalt | Schneiden | Stapel | Gitter | Anordnung | Rand | Innen-Außen | Lagerung | Ausbreitung | Stufenpyramide