Square Footage Calculator
Enter a room or lot's length and width to get its area in square feet, square meters, and square yards — useful for flooring, paint, carpet, or landscaping material estimates.
How the Square Footage formula works
Area of a rectangle:
Area (ft²) = Length(ft) × Width(ft) Area (yd²) = Area (ft²) / 9 Area (m²) = Area (ft²) × 0.092903
Step-by-step calculation
- Measure the length and width of the space in feet.
- Multiply length by width to get the area in square feet.
- Divide by 9 to convert to square yards (useful for carpet pricing).
- Multiply by 0.092903 to convert to square meters.
- If you have a price per square foot, multiply it by the area for a material cost estimate.
Worked example
A room measuring 14 ft × 11 ft: Area = 14 × 11 = 154 ft². In square yards, 154 / 9 ≈ 17.1 yd². At $4.50 per square foot for flooring, material cost ≈ 154 × $4.50 = $693.
Frequently asked questions
How do I calculate square footage for an irregular room?
Split the room into rectangular sections, calculate each section's area separately using this calculator, then add the results together for the total square footage.
Why does flooring get priced in square yards sometimes?
Carpet is manufactured and sold in yard-wide rolls, so carpet retailers traditionally price by the square yard, while most other flooring (tile, hardwood, laminate) is priced by the square foot.
Should I subtract closets and alcoves?
For a livable-area estimate, include them since they still need flooring or paint. For real-estate square footage disclosures, follow your local measurement standard, which may exclude certain spaces.