Rectangle Area Calculator – quickly find the area and perimeter of any rectangle.
Enter width and height in inches, feet, or centimeters — get instant results for total area, perimeter, and conversions between units.
Rectangle Area Calculator – find area from width and height.
Rectangle Area Calculator – Find Area & Perimeter from Width and Height
The Rectangle Area Calculator lets you compute the total area and perimeter of any rectangle in seconds.
Enter the width and height in inches, feet, or centimeters and get instant, accurate results with unit conversions.
Standard formulas:
Area = Width × Height • Perimeter = 2 × (Width + Height).
Example: 10 in × 12 in → Area = 120 in², Perimeter = 44 in.
Ideal for geometry, flooring, construction, or land measurements. Below, you’ll find a quick guide,
common-unit conversions (in², ft², cm², m²), and FAQ to help you use the calculator effectively.
Rectangle Area Formula
The area of a rectangle is calculated by multiplying its width by its height. This rule applies to all units — whether you measure in inches, feet, centimeters, or meters — making it a universal geometry formula.
- Area = Width × Height
- Perimeter = 2 × (Width + Height)
Example:
If Width = 10 in and Height = 12 in:
→ Area = 10 × 12 = 120 in²
→ Perimeter = 2 × (10 + 12) = 44 in
💡 Tip: 1 square foot = 144 square inches = 0.0929 square meters.
Conversion Table – Rectangle Area in Common Units
Use this quick reference table to convert rectangle area between
square inches (in²), square feet (ft²), and
square centimeters (cm²). It helps when comparing surface sizes in
different measurement systems — for flooring, design, or construction projects.
| Square Inches (in²) | Square Feet (ft²) | Square Centimeters (cm²) |
|---|---|---|
| 1 in² | 0.00694 ft² | 6.4516 cm² |
| 50 in² | 0.347 ft² | 322.58 cm² |
| 100 in² | 0.694 ft² | 645.16 cm² |
| 500 in² | 3.47 ft² | 3225.8 cm² |
| 1000 in² | 6.94 ft² | 6451.6 cm² |
💡 Tip: 1 square foot = 144 square inches = 0.0929 square meters.
You can also use the Rectangle Area Calculator above to convert areas dynamically between units.
How to Use the Rectangle Area Calculator
Using this Rectangle Area Calculator is simple — it instantly computes both the area and perimeter of any rectangle in your chosen unit. Follow these quick steps:
- Enter the width and height of the rectangle.
- Select your preferred unit (inches, feet, or centimeters).
- Click Convert to instantly get the total area and perimeter.
- Use Copy results to save or share your output.
💡 Tip: Try entering values like 10 × 12 to see how the area and perimeter adjust automatically in real time.
Irregular and Land Area Notes
This Rectangle Area Calculator is designed for perfect rectangles with straight edges and 90° corners.
However, many real-world surfaces — such as land plots, floor layouts, or custom shapes — may not be perfectly rectangular.
To estimate the area of irregular 4-sided shapes, divide them into smaller rectangles or triangles,
calculate each section separately, and then sum the results.
You can use our Triangle Area Calculator
for non-rectangular portions.
💡 Tip: For land or floor projects, convert your total calculated area into
square feet or square meters for consistent comparison and cost estimation.
FAQs – Rectangle Area Basics
1. What is the formula for the area of a rectangle?
The formula is Area = Width × Height. It works for any unit — inches, feet, centimeters, or meters.
2. How do you calculate area in square feet or square inches?
Multiply width by height using the same unit. If you measure in inches, divide the result by 144 to get square feet.
3. What is the difference between area and perimeter?
Area measures the surface covered (in square units), while perimeter measures the total distance around the shape.
4. Can I calculate area for rectangles in cm or meters?
Yes. The Rectangle Area Calculator supports centimeters, meters, inches, and feet — automatically converting between units.
5. How to find the area of an irregular rectangle?
Divide the shape into smaller rectangles or triangles, calculate each separately, then add up the total.
Try our Triangle Area Calculator for non-rectangular sections.
6. What happens if width and height are equal?
When both sides are equal, the rectangle becomes a square, and the same formula applies: Area = side × side.
Conclusion – Understanding Rectangle Area & Perimeter
The Rectangle Area Calculator provides a fast and reliable way to measure both area and perimeter for any rectangular shape.
Whether you’re working on a geometry project, home renovation, or land survey, this tool ensures instant, accurate conversions between square inches, square feet, centimeters, and meters.
Understanding how to calculate area and perimeter isn’t just useful for academics — it’s practical knowledge used daily in construction,
design, and real estate. With one click, you can compare results in multiple units and make precise, data-driven decisions.
For non-rectangular or uneven plots, try our
Triangle Area Calculator
or Sector Area Calculator
to explore more complex geometry shapes.
📘 Reference: Wikipedia – Rectangle Formula & Properties
Related Tools
- 🟢 Square Inch Calculator – for smaller surfaces and material planning.
- 🟢 Triangle Area Calculator – for angled or 3-sided shapes.
- 🟢 Circle Area Calculator – for circular and curved measurements.
- 🟢 Missing Side Calculator – when one rectangle side is unknown.