Welcome to our Rectangle Area and Perimeter Calculator page.
We explain how to find the area and perimeter of a rectangle and provide a quick calculator to work them out for you, step-by-step.
There are also some worked examples and links to some worksheets where you can practice this skill.
This calculator finds the area and perimeter of a rectangle when the side lengths are known.
The area of a rectangle is the amount of space inside the rectangle.
The perimeter of a rectangle is the distance around the edge of the rectangle.
The formula for the area of a rectangle is: \[ A = l \cdot w \; \]
where l is the length and w is the width of the rectangle
The formula for the perimeter of a rectangle is: \[ P = 2l + 2w \; \]
where l is the length and w is the width of the rectangle
Find the area and perimeter of the rectangle below.
The length of rectangle is 12 cm and the width is 7 cm.
The area of a rectangle
\[ A = l \cdot w \; \] where l is the length and w is the width of the rectangle.
So if we substitute the values of the length and width into this equation, we get: \[ A = 12 \times 7 = 84 \]
The area of the rectangle is 84 cm2.
The perimeter of a rectangle
\[ P = 2l + 2w \; \]
So if we substitute the values of the length and width into this equation, we get: \[ P = (2 \times 12) + (2 \times 7) = 24 + 14 = 38 \]
The perimeter of the rectangle is 38 cm.
Find the area and perimeter of the rectangle below.
The length of rectangle is 2.4 m and the width is 0.7 m.
The area of a rectangle
\[ A = l \cdot w \; \] where l is the length and w is the width of the rectangle.
So if we substitute the values of the length and width into this equation, we get: \[ A = 2.4 \times 0.7 = 1.68 \]
The area of the rectangle is 1.68 m2.
The perimeter of a rectangle
\[ P = 2l + 2w \; \]
So if we substitute the values of the length and width into this equation, we get: \[ P = (2 \times 2.4) + (2 \times 0.7) = 4.8 + 1.4 = 6.2 \]
The perimeter of the rectangle is 6.2 m.
Find the area and perimeter of the rectangle below leaving your answer for the area as a mixed fraction.
Although this shape is tilted, it is still a rectangle.
The length of rectangle is 3 ½ inches and the width is 8 ½ inches.
The area of a rectangle
\[ A = l \cdot w \; \] where l is the length and w is the width of the rectangle.
So if we substitute the values of the length and width into this equation, we get: \[ A = 3 {1 \over 2} \times 8 {1 \over 2} = {7 \over 2} \times {17 \over 2} \]
Multiplying the fractions together gives us: \[ A = {7 \times 17 \over 2 \times 2} = {119 \over 4} = 29 {3 \over 4} \]
The area of the rectangle is 29 ¾ in2.
The perimeter of a rectangle
\[ P = 2l + 2w \; \]
So if we substitute the values of the length and width into this equation, we get: \[ P = 2 \times 3 {1 \over 2} + 2 \times 8 {1 \over 2} = 7 + 17 = 24 \]
The perimeter of the rectangle is 24 inches.
Find the area and perimeter of the rectangle below. Give your answer in cm or cm2.
The length of rectangle is 2.1 m and the width is 45 cm.
First we need to convert 2.1 m into cm so that both measurements have the same units of measure.
1 m = 100 cm so 2.1 m = 2.1 x 100 = 210 cm
The area of a rectangle
\[ A = l \cdot w \; \] where l is the length and w is the width of the rectangle.
So if we substitute the values of the length and width into this equation, we get: \[ A = 210 \times 45 = 9450 \]
The area of the rectangle is 9450 cm2.
The perimeter of a rectangle
\[ P = 2l + 2w \; \]
So if we substitute the values of the length and width into this equation, we get: \[ P = (2 \times 210) + (2 \times 45) = 420 + 90 = 510 \]
The perimeter of the rectangle is 510 cm.
You can use our Rectangle area and perimeter calculator to check any of these examples out!
We have a range of other area worksheets and support pages for a range of different 2d shapes.
We have a range of area and volume calculators to help you find the area and volumes of a range of different 2d and 3d shapes.
Each calculator page comes with worked examples, formulas and practice worksheets.
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