Area of Rectangle Calculator - Mathematical Calculations & Solutions
How It Works
Enter Dimensions
Input length and width
Calculate
Apply formulas
Common Examples
What is Area of Rectangle?
The area of rectangle is the space inside a rectangle. It tells you how much room is inside the shape. To find the area of rectangle, you multiply the length by the width. This gives you the total space in square units.
A rectangle has four sides. Two sides are long (length) and two sides are short (width). The area of rectangle calculator helps you find this space quickly and easily.
Our area of rectangle calculator is free and simple to use. Just enter the length and width, and the calculator will show you the area right away.
Simple Formula
Area = Length × Width. Easy to remember and use for any rectangle.
Real Life Uses
Find room size, carpet area, garden space, and painting area.
Quick Results
Get instant answers with our free area of rectangle calculator.
How to Calculate Area of Rectangle
Calculating the area of rectangle is very easy. You only need two numbers: the length and the width. Here are the simple steps to find the area of rectangle:
Step by Step Guide
Measure the Length
Find the longer side of the rectangle. This is the length.
Measure the Width
Find the shorter side of the rectangle. This is the width.
Multiply Length × Width
Use the area of rectangle formula: Area = Length × Width.
Get Your Answer
The result is the area in square units (like square feet or square meters).
Example Calculation
Let's find the area of a rectangle that is 8 feet long and 5 feet wide:
Length: 8 feet
Width: 5 feet
Formula: Area = Length × Width
Calculation: Area = 8 × 5
Answer: 40 square feet
This means the rectangle has 40 square feet of space inside it.
Area of Rectangle Formula
The area of rectangle formula is simple and easy to remember. You just multiply the length by the width. This formula works for all rectangles, no matter how big or small they are.
When you use the area of rectangle calculator, it uses this same formula. The calculator does the math for you, so you get the right answer every time.
Important Points
- •Always use the same units for length and width
- •The answer will be in square units
- •Length and width must be positive numbers
- •You can use decimals in the area of rectangle calculator
Common Units
Length Units: feet, meters, inches, centimeters
Area Units: square feet, square meters, square inches
If length is in feet and width is in feet, then area will be in square feet.
Real Life Examples of Area of Rectangle
The area of rectangle calculator is useful in many real life situations. Here are some common examples where you need to find the area of rectangle:
🏠 Room Size
Find how much space is in a room. Measure the length and width of the room, then use the area of rectangle calculator to get the total floor area.
🎨 Painting Walls
Calculate how much paint you need for a wall. Find the area of rectangle for each wall to know the total area to paint.
🌱 Garden Planning
Plan your garden space. Use the area of rectangle calculator to find how much space you have for planting.
🏗️ Construction
Calculate material needs for building projects. Find the area of rectangle for floors, walls, and other rectangular surfaces.
📐 School Math
Solve geometry problems in school. The area of rectangle calculator helps students check their homework answers.
🏠 Flooring
Calculate how much flooring material you need. Find the area of rectangle for each room to buy the right amount.
Area of Rectangle Calculation Table
This table shows different examples of area of rectangle calculations. You can use these examples to understand how the area of rectangle calculator works:
| Length | Width | Area (Length × Width) | Perimeter |
|---|---|---|---|
| 5 feet | 3 feet | 15 square feet | 16 feet |
| 10 meters | 8 meters | 80 square meters | 36 meters |
| 12 inches | 6 inches | 72 square inches | 36 inches |
| 15 cm | 10 cm | 150 square cm | 50 cm |
| 20 feet | 14 feet | 280 square feet | 68 feet |
| 7.5 meters | 4.2 meters | 31.5 square meters | 23.4 meters |
Note: The area of rectangle calculator can handle any size numbers, including decimals. Just make sure to use the same units for both length and width.
Tips for Using Area of Rectangle Calculator
✅ Do This
- ✓Use the same units for length and width (all feet or all meters)
- ✓Double-check your measurements before using the calculator
- ✓Use decimals for more precise measurements (like 5.5 feet)
- ✓Remember that area is always in square units
❌ Avoid This
- ✗Don't mix different units (like feet and meters together)
- ✗Don't use negative numbers for length or width
- ✗Don't forget to include units in your final answer
- ✗Don't confuse area (space inside) with perimeter (distance around)
Frequently Asked Questions About Area of Rectangle Calculator
How do I use the area of rectangle calculator?
Using our area of rectangle calculator is very simple. First, enter the length of your rectangle in the length box. Then, enter the width in the width box. The calculator will instantly show you the area and perimeter. Make sure both numbers use the same units (like both in feet or both in meters).
What is the formula for area of rectangle?
The area of rectangle formula is: Area = Length × Width. This means you multiply the length by the width. For example, if a rectangle is 8 feet long and 5 feet wide, the area is 8 × 5 = 40 square feet. Our area of rectangle calculator uses this same formula to give you quick results.
What units can I use in the area of rectangle calculator?
You can use any units for length and width, such as feet, meters, inches, centimeters, or yards. The important thing is to use the same unit for both length and width. If you use feet for length, use feet for width too. The area will then be in square units (like square feet or square meters).
Can I use decimal numbers in the area of rectangle calculator?
Yes! The area of rectangle calculator works with decimal numbers. You can enter values like 5.5 feet or 3.25 meters. This is helpful when you have precise measurements. The calculator will give you an exact answer, even with decimal inputs.
What is the difference between area and perimeter of a rectangle?
Area tells you how much space is inside the rectangle (like how much carpet you need for a room). Perimeter tells you the distance around the outside of the rectangle (like how much fence you need around a yard). Area is measured in square units, while perimeter is measured in regular units.
Is this area of rectangle calculator free to use?
Yes, our area of rectangle calculator is completely free to use. You don't need to sign up or pay anything. You can use it as many times as you want for all your rectangle area calculations. It works on computers, tablets, and phones.
How accurate is the area of rectangle calculator?
The area of rectangle calculator is very accurate. It uses precise math to calculate the area and perimeter. As long as you enter the correct measurements, the calculator will give you the exact right answer. It can handle very small and very large numbers with perfect accuracy.
When would I need to calculate the area of a rectangle?
You might need the area of rectangle calculator for many reasons: finding room sizes for flooring or carpet, calculating paint needed for walls, planning garden spaces, doing homework problems, or figuring out material needs for construction projects. It's useful anytime you need to know how much space is inside a rectangular shape.
What if I don't know which side is length and which is width?
It doesn't matter which side you call length and which you call width! The area of rectangle calculator will give you the same answer either way. You can put the longer measurement in either box. The formula Length × Width works the same as Width × Length.
Can I use this calculator for squares too?
Yes! A square is just a special type of rectangle where all sides are the same length. To find the area of a square using our area of rectangle calculator, just enter the same number for both length and width. For example, for a 5×5 square, enter 5 in both boxes.
Why Choose Our Area of Rectangle Calculator?
Fast Results
Get instant answers as soon as you enter the numbers. No waiting or loading time.
100% Accurate
Our area of rectangle calculator uses precise math for perfect results every time.
Completely Free
Use our calculator as much as you want. No cost, no sign-up, no limits.
Works Everywhere
Use on your phone, tablet, or computer. Works on all devices and browsers.
Easy to Use
Simple design that anyone can understand. Just enter length and width, get your answer.
Handles Decimals
Works with whole numbers and decimals for precise measurements and calculations.
Start Using Our Area of Rectangle Calculator Today
Our area of rectangle calculator makes finding rectangle areas quick and easy. Whether you're a student working on math homework, a homeowner planning a renovation, or a professional needing precise calculations, this free tool gives you accurate results instantly.
Simply enter your rectangle's length and width, and get both the area and perimeter right away. The area of rectangle calculator is free, accurate, and works on all devices. Try it now!