A = l × w
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Try an Example
Pick a scenario to see how the calculator works, then adjust the values
Living Room Floor
Calculate the floor area of a 5m x 3m rectangular living room.
Key values: Rectangle · 5m x 3m · 15 m²
Circular Garden
Find the area of a circular garden bed with a 5-meter radius.
Key values: Circle · Radius: 5m · ≈78.54 m²
Triangular Plot (SSS)
Calculate the area of a triangular land plot with sides 3, 4, and 5 meters using Heron's formula.
Key values: Triangle (SSS) · Right triangle · 6 m²
Hexagonal Patio
Find the area of a regular hexagonal patio with 10m sides.
Key values: Regular Polygon · 6 sides · 10m per side
This calculator is also known as Calculate Area.
Read the complete guideWhat Is Area?
Area measures the amount of two-dimensional space a shape occupies. It is always expressed in square units (such as square meters, square feet, or square centimeters). Understanding area is fundamental to geometry and has countless practical applications.
Common Area Formulas
Reference table of the most-used area formulas:
| Category | Value |
|---|---|
| Rectangle | A = length x width |
| Triangle | A = 1/2 x base x height |
| Circle | A = pi x radius^2 |
| Trapezoid | A = 1/2 x (base1 + base2) x height |
| Parallelogram | A = base x height |
Examples
Rectangle Room
A bedroom measuring 4.2 m by 3.5 m.
A = 4.2 x 3.5 = 14.7 m squared. This equals about 158 square feet.
Key takeaway: For flooring purchases, add 10% for waste when ordering materials.
Tips for Accurate Area Calculations
Follow these best practices:
- Always convert all measurements to the same unit before calculating
- For parallelograms and trapezoids, use the perpendicular height, not the slant side
- Double-check the radius vs. diameter when calculating circle area
- For complex rooms, divide into rectangles and triangles, then add the areas
Frequently Asked Questions about Calculate Area
What units is area measured in?
Area is measured in square units. Common units include square meters (m squared), square feet (ft squared), square centimeters (cm squared), acres, and hectares. The unit depends on the context: rooms are often measured in square feet or square meters, while land is measured in acres or hectares.
How do I calculate the area of an irregular shape?
Break the irregular shape into simpler shapes (rectangles, triangles, etc.), calculate each area separately, and add them together. For more complex shapes, use the Shoelace formula with coordinate pairs.
What is the difference between area and perimeter?
Area measures the space inside a shape (in square units), while perimeter measures the total distance around the outside of a shape (in linear units). They are independent quantities -- shapes with the same perimeter can have very different areas.
Specialized Calculators
Choose from 8 specialized versions of this calculator, each optimized for specific use cases and calculation methods.
Shape
8 CalculatorsRelated Calculators
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