Rectangle Area Calculator
Calculate the area of a rectangle quickly and accurately. Enter the length and width in any unit, feet, meters, inches, centimeters, yards, or miles, and get instant results in multiple units. Perfect for construction, DIY projects, geometry homework, and more.
What Is a Rectangle?
A rectangle is a four-sided polygon (quadrilateral) with four right angles (90°). Opposite sides of a rectangle are parallel and equal in length. The longer side is called the length, and the shorter side is called the width.
The area of a rectangle is the amount of space inside the rectangle. It is calculated by multiplying the length by the width:
Area = Length × Width
For example: A rectangle with length 10 ft and width 6 ft has an area of 10 × 6 = 60 ft².
The perimeter of a rectangle is the total distance around the outside:
Perimeter = 2 × (Length + Width)
For example: A rectangle with length 10 ft and width 6 ft has a perimeter of 2 × (10 + 6) = 32 ft.
How Does the Rectangle Area Calculator Work?
The calculator uses the standard geometric formula to compute the area:
- Area = Length × Width
- Perimeter = 2 × (Length + Width)
Simply enter the length and width in your preferred units, and the calculator will instantly display the area in multiple unit conversions. You can also choose to view the perimeter and the formula used in the calculation.
Common Unit Conversions
- 1 square foot (ft²) = 144 square inches (in²)
- 1 square yard (yd²) = 9 square feet (ft²)
- 1 square meter (m²) ≈ 10.764 square feet (ft²)
- 1 square centimeter (cm²) = 0.001076 square feet (ft²)
- 1 acre = 43,560 square feet (ft²)
Why Use This Rectangle Area Calculator?
- Multiple Units: Supports feet, inches, yards, miles, meters, centimeters, and kilometers.
- Instant Conversions: See the area in multiple units at a glance.
- Visual Breakdown: A chart shows the relative dimensions of the rectangle.
- Perimeter Option: Optionally display the perimeter of the rectangle.
- Free & Private: No registration, no data storage.
❓ Rectangle Area Calculator FAQ
What is the formula for the area of a rectangle?
The formula for the area of a rectangle is: Area = Length × Width. For example, a rectangle with length 10 ft and width 6 ft has an area of 60 ft².
How do I calculate the area of a rectangle in square feet?
Measure the length and width in feet, then multiply them together. For example, 10 ft × 6 ft = 60 ft². This calculator does the math for you.
What is the difference between area and perimeter?
Area measures the space inside a shape (2D). Perimeter measures the distance around the outside of a shape. They are different measurements used for different purposes.
How do I convert square feet to square meters?
Multiply square feet by 0.092903 to get square meters. For example, 60 ft² × 0.092903 = 5.57 m². This calculator shows conversions automatically.
How do I convert square feet to square yards?
Divide square feet by 9 to get square yards. For example, 60 ft² ÷ 9 = 6.67 yd².
What is a rectangle?
A rectangle is a four-sided shape with four right angles (90°). Opposite sides are parallel and equal in length. The longer side is the length, and the shorter side is the width.
What is the difference between a rectangle and a square?
A square is a special type of rectangle where all four sides are equal in length. All squares are rectangles, but not all rectangles are squares.
How do I calculate the perimeter of a rectangle?
The perimeter of a rectangle is calculated by adding all four sides: Perimeter = 2 × (Length + Width). This calculator can show the perimeter when the "Show Perimeter" option is enabled.
How many square feet is a 10x10 room?
A 10 ft × 10 ft room has an area of 10 × 10 = 100 ft².
How many square feet is a 12x12 room?
A 12 ft × 12 ft room has an area of 12 × 12 = 144 ft².
How do I find the length of a rectangle if I know the area and width?
Length = Area ÷ Width. For example, if the area is 60 ft² and the width is 6 ft, the length is 60 ÷ 6 = 10 ft.
How do I find the width of a rectangle if I know the area and length?
Width = Area ÷ Length. For example, if the area is 60 ft² and the length is 10 ft, the width is 60 ÷ 10 = 6 ft.
What units can I use for area?
Area can be measured in square feet (ft²), square inches (in²), square yards (yd²), square meters (m²), square centimeters (cm²), acres, and many other square units. This calculator supports multiple units.
How do I calculate the area of an irregular shape?
Irregular shapes can often be divided into rectangles, squares, triangles, and other regular shapes. Calculate the area of each part and add them together. This calculator focuses on rectangles.
What is the area of a rectangle with length 15 and width 8?
Area = 15 × 8 = 120 square units.
Can I use this calculator for a square?
Yes. Since a square is a special type of rectangle, you can enter the same value for length and width. The calculator will compute the area correctly.
How accurate is this rectangle area calculator?
This calculator provides accurate results based on the standard formula and the values you enter. The precision can be adjusted in the advanced options.
How do I calculate the area of a rectangle in inches?
Measure the length and width in inches, then multiply them together. This calculator supports inches as a unit option.