OverCalculator

About This Calculator

The Square Footage Calculator helps you determine the area of any space in square feet. Whether you’re planning a renovation, estimating materials for flooring, or listing a property, this calculator provides accurate measurements for various shapes including rectangles, triangles, and circles.

How to Calculate Square Footage

1. For Rectangular Areas (most common):

   • Measure the length and width of the space
   • Multiply length × width
   • Example: A room 12 feet long by 10 feet wide = 120 square feet

2. For Circular Areas:

   • Measure the radius (distance from center to edge)
   • Use the formula: π × radius²
   • Example: A circular room with 8-foot radius = 201.06 square feet

3. For Triangular Areas:

   • Measure the base and height
   • Use the formula: (base × height) ÷ 2
   • Example: A triangular space with 10-foot base and 8-foot height = 40 square feet

Common Applications

Real Estate

• Determining living space for property listings
• Calculating price per square foot
• Comparing property sizes
• Meeting building code requirements

Construction and Renovation

• Ordering materials (flooring, carpet, tile)
• Estimating paint coverage
• Planning room layouts
• Calculating material costs

Home Improvement

• Flooring Projects: Add 10% extra for cuts and waste
• Paint Coverage: One gallon typically covers 350-400 square feet
• Carpet Installation: Consider room width for minimal seams
• Tile Work: Account for pattern and layout waste

Tips for Accurate Measurement

1. Measure Each Room Separately

   • Break down irregular shapes into basic geometric forms
   • Include closets and built-in areas
   • Exclude unfinished spaces unless specified

2. Standard Practices

   • Measure to the nearest inch for accuracy
   • Include all usable living space
   • Exclude outdoor areas unless covered
   • Consider wall thickness for exterior measurements

3. What to Include/Exclude Include:

   • All finished living areas
   • Closets and storage spaces
   • Finished basements and attics

   Exclude:

   • Unfinished areas
   • Patios and porches (unless enclosed)
   • Garages (unless converted)
   • Utility spaces

Unit Conversions

• 1 square foot = 144 square inches
• 1 square foot = 0.093 square meters
• 1 square yard = 9 square feet
• 1 acre = 43,560 square feet

Professional Tips

1. For Irregular Shapes

   • Break down into smaller regular shapes
   • Calculate each section separately
   • Add the areas together
   • Double-check all measurements

2. For Cost Calculations

   • Always include extra material for waste
   • Consider pattern matching requirements
   • Factor in installation costs
   • Add contingency for unexpected issues

3. For Real Estate

   • Follow local measurement standards
   • Document all measurements
   • Include/exclude areas as per local practice
   • Consider ANSI guidelines if applicable