Rectangle Area Calculator
This free online calculator will help you to find the area of a rectangle.
Using this online calculator, you will receive a detailed step-by-step solution to your problem, which will help you understand the algorithm how to find rectangle area.
Calculation of Rectangle Area
Entering data into the rectangle area calculator
- enter the lengths of the sides of the rectangle;
- select units of measurement - meter (m), centimeter (cm) or millimeter (mm);
- select in which units you want to get the area - square meters (m2), square centimeters (cm2) or square millimeters (mm2).
You can input only integer numbers or fractions in this online calculator. More in-depth information read at these rules.
Additional features of rectangle area calculator
- Use and keys on keyboard to move between field in calculator.
Theory. Rectangle Area
The formula of the rectangle areaTo find area of rectangle ABCD you mast multiply lengths of its sides a and b.
A = a · b
where A - rectangle area,
a - length of first rectangle side,
b - length of second rectangle side.
You can input only integer numbers, decimals or fractions in this online calculator (-2.4, 5/7, ...). More in-depth information read at these rules.
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