What This Calculator Does
This tool calculates the area of a rectangle in square centimeters (cm²). A rectangle's area is the amount of flat space it covers, and it is found by multiplying its length by its width. When both measurements are entered in centimeters, the result is automatically expressed in square centimeters.
How to Use It
Enter the length of the rectangle in centimeters and the width in centimeters, then read the area in cm² from the result box. Make sure both measurements use the same unit (centimeters). If your measurements are in millimeters, divide by 10 first; if in meters, multiply by 100 to convert to centimeters before entering them.
The Formula Explained
The area formula for a rectangle is $$A = l \times w$$ where l is the length and w is the width. Because area is a two-dimensional measurement, multiplying two lengths (each in cm) yields a unit of \(\text{cm} \times \text{cm} = \text{cm}^2\). This same formula applies to squares, where length and width are equal.
Worked Example
Suppose a tabletop measures 120 cm long and 75 cm wide. Multiply the two values: $$120 \times 75 = 9{,}000$$ The area is therefore 9,000 square centimeters. To express this in square meters, divide by 10,000, giving 0.9 m².
FAQ
How many square centimeters are in a square meter? There are 10,000 cm² in 1 m², because \(1\,\text{m} = 100\,\text{cm}\) and \(100 \times 100 = 10{,}000\).
Does this work for a square? Yes. A square is a rectangle with equal sides, so enter the same value for both length and width.
What if my room is in inches? Convert inches to centimeters first by multiplying by 2.54, then enter the values here.
