Square Footage Calculator
Calculate the square footage of rooms, floors, or any rectangular space. Perfect for flooring, painting, carpeting, and construction projects.
Room Dimensions
Additional Rooms (Optional)
Square Footage Results
Room Breakdown:
Material Estimates
How to Use This Square Footage Calculator
To calculate square footage:
- Select your preferred measurement unit (feet, inches, meters, or centimeters)
- Enter the length and width of your main room
- Add additional rooms if needed by clicking "Add Another Room"
- The calculator will instantly show total square footage and conversions
- View material estimates for common projects like flooring and painting
How Square Footage Calculation Works
Square footage is calculated using a simple formula:
Square Footage = Length × Width
For multiple rooms, we add up the individual areas:
Total Area = Room 1 Area + Room 2 Area + ... + Room N Area
Conversions used:
- 1 square foot = 0.092903 square meters
- 1 square foot = 0.111111 square yards
- 1 square foot = 144 square inches
Example Calculation
For a room that is 12 feet long and 10 feet wide:
- Square footage: 12 × 10 = 120 square feet
- Square meters: 120 × 0.092903 = 11.15 square meters
- Square yards: 120 × 0.111111 = 13.33 square yards
For flooring with 10% waste factor: 120 × 1.1 = 132 square feet needed
Frequently Asked Questions
Why should I add extra material for waste?
Adding 5-10% extra material accounts for cutting waste, mistakes, and future repairs. Flooring typically needs 10% extra, while carpet needs about 5% extra.
How do I measure irregular shaped rooms?
Break irregular rooms into rectangular sections and calculate each section separately, then add them together using the "Additional Rooms" feature.
Should I subtract areas for doors and windows?
For flooring, no - you typically don't subtract doors and windows. For wall coverings like paint or wallpaper, you may want to subtract large openings, but small openings are often ignored due to waste factors.