Area Calculator
Calculate surface area for 11+ geometric 2D shapes with interactive diagrams, formula breakdowns, and multi-shape accumulation.
Rectangle Area
Equivalent Area in Standard Units
Accumulated Project Area
Area Geometric Formulas
- Rectangle: Area = Length × Width
- Triangle: Area = ½ × Base × Height
- Circle: Area = π × Radius²
- Trapezoid: Area = ½ × (a + b) × Height
- Ellipse: Area = π × a × b
- Sector: Area = ½ × r² × (θ in radians)
Quick Unit Conversions
• 1 m² = 10.7639 sq ft
• 1 sq yd (Gaj) = 9 sq ft
• 1 Acre = 43,560 sq ft (4,046.86 m²)
• 1 Hectare = 10,000 m² (2.471 Acres)
How to Use Area Calculator
- Select the 2D geometric shape you want to calculate (Rectangle, Triangle, Circle, Trapezoid, Ellipse, L-Shape, etc.).
- Choose your preferred measurement unit (Feet, Meters, Inches, Centimeters, Yards).
- Enter the required dimensions (length, width, radius, base, height) into the input fields.
- View the calculated surface area instantly, along with the live SVG shape preview and formula breakdown.
- Click 'Add to Multi-Shape Total' to accumulate areas of different sections for a complete floor plan total.
Key Features & Privacy Guarantee
- 11 Geometric Shapes Supported: Rectangle, Square, Triangle (Base/Height & Heron's 3 sides), Circle, Sector, Ellipse, Trapezoid, Parallelogram, Rhombus, L-Shape, and Regular Polygon.
- Dynamic SVG Diagram: Real-time visual shape rendering with labeled dimension lines reflecting your inputs.
- Comprehensive Unit Matrix: Instant conversion across Square Feet, Square Meters, Square Yards (Gaj), Acres, Hectares, and Square Inches.
- Shape Accumulator / Project Builder: Sum multiple distinct shapes together to get total plot or floor plan area with 1-click export.
- 100% Client-Side & Private: All calculations happen locally inside your browser with zero latency.
Frequently Asked Questions
How do you calculate the area of an irregular or L-shaped room?
An L-shaped room can be calculated by splitting it into two simpler rectangles (Rectangle A and Rectangle B), calculating the area of each (Length × Width), and adding them together.
How do you calculate triangle area when all 3 sides are known?
Use Heron's Formula: Area = √(s(s - a)(s - b)(s - c)), where s is the semi-perimeter: s = (a + b + c) / 2.
How many square feet are in one square meter?
1 Square Meter (m²) equals exactly 10.7639 Square Feet (sq ft). To convert m² to sq ft, multiply by 10.7639.
What is the formula for the area of an ellipse?
The area of an ellipse is π × a × b, where 'a' is the semi-major axis (half the total width) and 'b' is the semi-minor axis (half the total height).