Square Footage Calculator
Calculate area in square feet, square meters, square yards, and acres for any rectangular space.
How to Calculate Square Footage
Square footage is a measurement of area that represents the size of a two-dimensional space. It's calculated by multiplying the length by the width of a rectangular area.
Square Footage Formula
Square Footage = Length × Width
Example: 10 ft × 12 ft = 120 sq ft
Common Uses of Square Footage
- Real Estate: Measuring home and property sizes
- Flooring: Calculating material needed for floors
- Painting: Estimating paint coverage for walls
- Carpeting: Determining carpet requirements
- Landscaping: Planning garden and lawn areas
- Construction: Project planning and material estimation
Unit Conversions
1 Square Foot= 0.0929 m²
1 Square Yard= 9 sq ft
1 Acre= 43,560 sq ft
1 Square Meter= 10.764 sq ft
Tips for Accurate Measurements
- Always measure in the same units (feet or meters)
- For irregular shapes, divide into rectangles and add the areas
- Add 10% extra for waste when buying materials
- Measure twice to ensure accuracy
- Account for doorways and obstacles when flooring
Calculating for Irregular Shapes
For non-rectangular spaces, divide the area into multiple rectangles, calculate each separately, and add them together. For triangular areas, use: Area = (Base × Height) / 2
Material Estimation
Common Coverage Rates:
- Paint: 350-400 sq ft per gallon
- Carpet: Sold by square yard (divide sq ft by 9)
- Tile: Add 10-15% for cuts and waste
- Hardwood: Add 5-10% for waste