Square Footage Calculator
Calculate area for various shapes and spaces
💡 Anyone who clicks this link will see the same calculation values
📚 Examples, Rules & Help
⚡Quick Examples - Try These Calculations
⚙️How It Works
Rectangle
Area = Length × Width (A = l × w). Multiply length by width to get total square footage.
Square
Area = Side² (A = s²). Square the length of one side since all sides are equal.
Circle
Area = π × Radius² (A = π × r²). Use pi (3.14159) multiplied by radius squared.
Triangle
Area = (Base × Height) ÷ 2 (A = (b × h) ÷ 2). Multiply base by height and divide by 2.
Trapezoid
Area = ((Base₁ + Base₂) × Height) ÷ 2. Add both parallel bases, multiply by height, divide by 2.
Parallelogram
Area = Base × Height (A = b × h). Multiply the base by the perpendicular height.
Sector
Area = (Angle × Radius²) ÷ 2. For angle in radians. Portion of a circle based on central angle.
Circle Border
Area = π × (Outer Radius² - Inner Radius²). Inner radius = Outer radius - Border width. Calculate outer circle area minus inner circle area.
📏Unit Conversions
multiply by 12
5 ft = 5 × 12 = 60 in
multiply by 3
2 yd = 2 × 3 = 6 ft
multiply by 3.28
5 m = 5 × 3.28 = 16.4 ft
multiply by 144
2 sq ft = 2 × 144 = 288 sq in
multiply by 9
3 sq yd = 3 × 9 = 27 sq ft
multiply by π/180
90° = 90 × π/180 = 1.57 rad
🌍Real-World Applications
Home Improvement
Calculate flooring, carpeting, tile, and paint coverage for rooms and spaces.
Tips:
- • Measure rooms at their widest points
- • Add 5-10% extra for waste and cutting
- • Account for doorways and built-in features
- • Consider pattern matching for materials
Landscaping Projects
Determine areas for lawn seeding, mulch coverage, and garden planning.
Tips:
- • Use irregular shape approximations for natural areas
- • Account for slopes and terrain changes
- • Plan for seasonal plant spacing requirements
- • Consider maintenance access pathways
Construction Planning
Calculate areas for concrete pours, roofing, and material estimation.
Tips:
- • Include structural requirements in calculations
- • Account for building codes and setbacks
- • Plan for weather protection during construction
- • Consider equipment access and staging areas
💡Planning Tips & Best Practices
Accurate Measurements
- •Use a quality measuring tape for precision
- •Measure twice, calculate once to avoid errors
- •Take photos of measurements for reference
- •Account for irregular shapes by breaking into simpler ones
Material Planning
- •Always order 5-15% extra material for waste
- •Consider material direction and pattern matching
- •Check delivery schedules and storage requirements
- •Keep receipts for returns and warranty claims
Project Execution
- •Plan installation sequence and logistics
- •Ensure proper tools and equipment availability
- •Consider weather conditions for outdoor projects
- •Have contingency plans for unexpected issues
❓Frequently Asked Questions
Which shapes are most commonly used?
Rectangle is most common for rooms and spaces. Circle is used for patios and landscaping. Triangle and trapezoid are useful for irregular spaces and rooflines.
How accurate are these calculations?
The calculations are mathematically precise. However, always add 5-15% extra material for waste, cutting, and irregularities in real-world applications.
What's the difference between a sector and a circle?
A sector is a portion of a circle defined by a central angle, like a slice of pie. A full circle has a 360° angle, while a sector can be any angle from 0° to 360°.
🎯Common Use Cases
🏠 🏠 Interior Spaces
- • Room flooring
- • Ceiling tiles
- • Wall painting
- • Carpet installation
🌿 🌿 Outdoor Areas
- • Lawn seeding
- • Deck planning
- • Garden beds
- • Patio design
🔧 🔧 Construction
- • Concrete pours
- • Roofing materials
- • Siding installation
- • Foundation planning