Square Footage Calculator
Calculate the square footage of rooms, houses, and land quickly and accurately. Enter dimensions in feet, inches, yards, or meters for rectangles, circles, triangles, and more. Perfect for real estate, construction, and home improvement.
What Is Square Footage?
Square footage is a measurement of area expressed in square feet (ft²). It is the standard unit of area for real estate, construction, and home improvement in the United States. Calculating square footage is essential for determining the size of rooms, houses, and land parcels, as well as estimating materials like flooring, paint, and tile.
This calculator supports six common shapes:
- Rectangle: Area = Length × Width
- Square: Area = Side²
- Triangle: Area = ½ × Base × Height
- Circle: Area = π × Radius²
- Trapezoid: Area = ½ × (Base₁ + Base₂) × Height
- Parallelogram: Area = Base × Height
How Does the Square Footage Calculator Work?
Simply select a shape, enter the required dimensions, and the calculator will instantly compute the area in square feet. You can enter dimensions in feet, inches, yards, or meters — the calculator handles unit conversions automatically.
Example: A rectangular room measuring 12 feet by 15 feet
Area = 12 × 15 = 180 square feet
Square Yards = 180 ÷ 9 = 20 sq yd
Square Meters = 180 × 0.092903 = 16.72 m²
The calculator also shows square yards and square meters conversions, making it easy to work with different measurement systems.
Why Use This Square Footage Calculator?
- Six Shapes: Supports rectangles, squares, triangles, circles, trapezoids, and parallelograms.
- Unit Flexibility: Enter dimensions in feet, inches, yards, or meters.
- Instant Conversions: See results in square feet, square yards, and square meters.
- Visual & Detailed: A chart and breakdown table show the calculation step by step.
- Free & Private: No registration, no data storage.
Real-World Applications of Square Footage
- Real Estate: Determining the size of homes, apartments, and land parcels.
- Construction: Estimating materials like flooring, tile, paint, and concrete.
- Home Improvement: Planning room layouts, furniture placement, and renovations.
- Landscaping: Calculating lawn size, garden beds, and patio areas.
- Interior Design: Sizing rugs, furniture, and wall coverings.
❓ Square Footage Calculator FAQ
What is square footage?
Square footage is a measurement of area expressed in square feet (ft²). It is the standard unit of area used in the US for real estate, construction, and home improvement.
How do I calculate square footage of a room?
Measure the length and width of the room in feet, then multiply them. For example, a room that is 12 feet by 15 feet has 180 square feet (12 × 15 = 180).
How do I calculate square footage of a house?
Measure each room individually, calculate the square footage of each, and add them together. For irregularly shaped areas, break them into rectangles, calculate each, and sum them.
How do I convert square feet to square yards?
Divide square feet by 9 (since 1 square yard = 9 square feet). For example, 180 sq ft ÷ 9 = 20 sq yd.
How do I convert square feet to square meters?
Multiply square feet by 0.092903. For example, 180 sq ft × 0.092903 = 16.72 m².
What is the formula for the area of a rectangle?
Area = Length × Width. For example, a rectangle with length 10 ft and width 8 ft has an area of 80 sq ft.
What is the formula for the area of a square?
Area = Side × Side (s²). For example, a square with side 10 ft has an area of 100 sq ft.
What is the formula for the area of a triangle?
Area = ½ × Base × Height. For example, a triangle with base 10 ft and height 8 ft has an area of 40 sq ft.
What is the formula for the area of a circle?
Area = π × Radius² (π ≈ 3.14159). For example, a circle with radius 5 ft has an area of 78.54 sq ft.
What is the formula for the area of a trapezoid?
Area = ½ × (Base₁ + Base₂) × Height. For example, a trapezoid with bases 12 ft and 8 ft and height 6 ft has an area of 60 sq ft.
What is the formula for the area of a parallelogram?
Area = Base × Height. For example, a parallelogram with base 10 ft and height 6 ft has an area of 60 sq ft.
How many square feet is a 10×10 room?
A 10 ft × 10 ft room has 100 square feet (10 × 10 = 100).
How many square feet is a 12×12 room?
A 12 ft × 12 ft room has 144 square feet (12 × 12 = 144).
How many square feet is a 20×20 room?
A 20 ft × 20 ft room has 400 square feet (20 × 20 = 400).
What is the difference between square footage and square yards?
Square footage measures area in square feet, while square yards measures area in square yards. One square yard equals 9 square feet. Square yards are often used for larger areas like land or carpet.
What is the difference between square footage and square meters?
Square footage measures area in square feet, while square meters (m²) are the metric unit for area. One square meter equals approximately 10.764 square feet.
How do I measure irregularly shaped rooms?
Break the room into regular shapes (rectangles, triangles, etc.), calculate the area of each, and add them together. This calculator can help with each individual shape.
How many square feet are in an acre?
One acre equals 43,560 square feet.
How accurate is this square footage calculator?
This calculator provides accurate results based on standard geometric formulas and the dimensions you enter. For precise measurements, always use a reliable tape measure or laser measuring tool.