Rectangle Calculator: Area, Perimeter & Diagonal

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How to Calculate Rectangle Area and Perimeter Step by Step

Length Width Units

What is Rectangle Calculator?

A Rectangle Calculator is a smart tool designed to calculate the area, perimeter, and diagonal of any rectangle easily. Just input your rectangle’s length and width, select your preferred units, and instantly get all results. This saves time for students, teachers, and anyone working with rectangles in real life.

The calculator is especially useful for figuring out the square footage (or meters) of floors, walls, fields, and more, ensuring quick, accurate answers. It also displays clear steps for learning and self-verification.

Formula Behind Rectangle Calculator

The calculator applies classic rectangle formulas: Area = Length × Width, Perimeter = 2 × (Length + Width), and Diagonal = √(Length² + Width²). Every rectangle has four right angles, each 90°. You can easily convert between units like centimeters, meters, feet, and inches.

Rectangle Conversion Table

Length × Width	Area (m²)	Perimeter (m)	Diagonal (m)
2 m × 3 m	6.00 m²	10.00 m	3.61 m
10 ft × 12 ft	11.15 m²	67.06 ft	15.62 ft
120 cm × 80 cm	0.96 m²	4.00 m	1.44 m
5 in × 7 in	0.023 m²	24.00 in	8.60 in

Steps to Use Rectangle Calculator

Enter the rectangle's length and width in your chosen units.
Select between centimeters, meters, inches, or feet.
Click "Calculate" to see the area, perimeter, diagonal, angles, and detailed calculation steps below.

Why Use Vedantu’s Rectangle Calculator?

This calculator lets you skip manual calculations, avoids unit mistakes, and always shows how your answer is derived. Instantly get all rectangle dimensions for academic, home, or construction use in a few taps, even on your mobile.

Trusted by Indian students and teachers nationwide, Vedantu’s calculator meets top syllabus standards and displays every calculation step for full transparency. Explore more tools like the HCF Calculator and Rectangle Area Formula in your studies.

Applications of Rectangle Calculator

The Rectangle Calculator is perfect for planning room renovations, estimating paint or tile needs, or solving classroom math assignments. Builders, carpenters, and DIYers use it to measure walls and floors efficiently.

It’s also handy for mapping land plots, crafting models, or verifying textbook problems. For more advanced geometry, discover Square Root Calculator and Multiples in Maths on Vedantu.

FAQs on Rectangle Calculator: Area, Perimeter & Diagonal

1. How do I calculate the area of a rectangle using this calculator?

Simply enter the length and width of your rectangle into the designated fields on Vedantu's Rectangle Calculator. Select your preferred units (meters, feet, etc.), and click 'Calculate'. The tool will instantly compute the area for you, along with the perimeter and diagonal. Area is calculated as Length x Width.

2. What is the formula for the perimeter of a rectangle?

The perimeter of a rectangle is the total distance around its four sides. Vedantu's Rectangle Calculator simplifies this calculation. The formula is: Perimeter = 2 * (Length + Width). This calculator will display the perimeter alongside the area and diagonal.

3. How can I find the length of the diagonal of a rectangle?

The diagonal of a rectangle connects opposite corners. Use Vedantu's Rectangle Calculator to easily determine this length. The formula applied is the Pythagorean theorem: Diagonal = √(Length² + Width²). The calculator provides this value directly.

4. What are the angles of a rectangle?

A rectangle is a quadrilateral with four right angles. Therefore, each interior angle of a rectangle measures exactly 90 degrees. This is a fundamental property of rectangles.

5. How do I convert the area of a rectangle from square meters to square feet?

Vedantu's Rectangle Calculator handles unit conversions. Simply input your length and width in meters, and the calculator will display the area in square meters. To get square feet, input your dimensions in feet. The conversion is automatically done, saving you calculation time.

6. Can this calculator help me with real-world applications?

Absolutely! This rectangle calculator is useful for various real-world scenarios. For instance, you can calculate the area of a room to determine how much flooring you need, find the perimeter of a garden to plan fencing, or calculate the diagonal distance across a rectangular field. It's a versatile tool with many practical applications.

7. What if I need to calculate the area of a rectangle in square centimeters?

Vedantu's Rectangle Calculator supports various units. Enter the length and width of the rectangle in centimeters; the calculator will automatically compute the area in square centimeters and display the results clearly.

8. How accurate are the calculations provided by this calculator?

Vedantu's Rectangle Calculator utilizes precise algorithms to ensure accurate calculations. The results are reliably accurate, making it a trustworthy tool for your geometry needs. Calculations are regularly checked for accuracy.

9. Are there any limitations to using this rectangle calculator?

The calculator primarily focuses on standard rectangles. It assumes the angles are all 90 degrees. While it's highly versatile, it's designed for straightforward rectangular calculations and doesn't address complex geometric shapes.

10. Where can I find more math tools like this one?

Vedantu offers a wide range of online math calculators and tools to help students with various mathematical concepts. You can explore more tools on the Vedantu website by searching for 'calculators' or navigating to the appropriate math sections. We provide various resources to support math learning.

11. What if I make a mistake entering the dimensions?

Simply correct the length and width values in the input fields and click 'Calculate' again. The calculator will recompute the results using the updated dimensions, providing immediate feedback. It’s easy to make corrections.

12. Is this calculator suitable for students of all levels?

Yes, Vedantu's Rectangle Calculator is designed to be user-friendly and accessible for students of all levels, from elementary school to high school. Its straightforward interface and clear results make it a valuable tool for anyone working with rectangles, regardless of their mathematical background.