Square Footage Calculator
Calculate the area of any space in square feet, square meters, or square yards. Supports multiple shapes and room sections.
Last updated: May 30, 2026
Enter Measurements
ft
ft
Area: 120 sq ft
Results
Total Area
120
square feet
11.15
square meters
13.33
square yards
How to Use This Calculator
1
Choose Unit & Shape
Select your measurement unit (feet, inches, meters) and the shape of your area.
2
Enter Dimensions
Input the length and width (or other dimensions based on shape).
3
Add More Areas
For complex spaces, add multiple sections and they'll be totaled automatically.
How We Calculate
Rectangle / Square
Area = Length × Width Example: 10 ft × 12 ft = 120 sq ft
Triangle
Area = (Base × Height) ÷ 2 Example: (10 ft × 8 ft) ÷ 2 = 40 sq ft
Circle
Area = π × Radius² Example: π × 5² = 78.54 sq ft
Trapezoid
Area = ((Top + Bottom) ÷ 2) × Height Example: ((8 + 12) ÷ 2) × 10 = 100 sq ft
Unit Conversions
- • 1 square foot = 144 square inches
- • 1 square yard = 9 square feet
- • 1 square meter = 10.764 square feet
- • 1 square foot = 0.0929 square meters
Frequently Asked Questions
For a rectangle or square, multiply length by width. For example, a 10 ft × 12 ft room equals 120 square feet. For other shapes, use the appropriate formula: triangles use (base × height) ÷ 2, circles use π × radius².
A 12×12 room is 144 square feet. Simply multiply 12 × 12 = 144 sq ft. This is equivalent to about 13.4 square meters or 16 square yards.
Yes! Select your unit and enter dimensions. For mixed measurements like 10 ft 6 in, enter 10.5 feet or switch to inches and enter 126 inches. The calculator handles the conversion automatically.
Break the room into smaller regular shapes (rectangles, triangles). Measure each section separately, then use our "Add Another Area" button to combine them. The calculator totals all sections automatically.
Measure each room's length and width, multiply them together, then add up all room areas. Add 10% extra for waste when ordering materials. Use our Flooring Calculator for material-specific estimates.
1 square yard equals 9 square feet (3 ft × 3 ft = 9 sq ft). To convert square feet to square yards, divide by 9. Carpet is often priced per square yard.
Calculate your total square footage, then add 10-15% for waste and cuts. Use our Tile Calculator or Flooring Calculator for precise material quantities including waste allowance.