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Area is commonly described as the extent of a two-dimensional
surface enclosed within a specified boundary. Calculating area is fairly straight
forward for well-defined regions, like regular polygons and symmetrical circles
and ellipses. Finding the area for irregular regions requires the application of
calculus. In fact, it is with the assistance of calculus that even a common formula
like for the area of an ellipse is derived. Below is a table of commonly
used area conversion factors. Standard units = Square
centimeter (cm2) for metric
Square inch (ft2) for SAE
| 1 in2 = |
1 |
6.944 · 10-3 |
6.452 |
6.452 · 10-4 |
1.273 · 106 |
| 1 ft2 = |
144 |
1 |
929.0 |
9.290 · 10-2 |
1.833 · 108 |
| 1 cm2 = |
0.1550 |
1.076 · 10-3 |
1 |
10-4 |
1.974 · 105 |
| 1 m2 = |
1550 |
10.76 |
104 |
1 |
1.974 · 109 |
| 1 cir mil = |
7.854 · 10-7 |
5.454 · 10-3 |
5.067 · 10-6 |
5.067 · 10-10 |
1 |
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