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Area Calculator

Free Square Footage Calculator

Total Area (Including Waste)
0.00sq ft (ft²)
≈ 0.00sq m (m²)
Net Area0.00 ft²(0.00 m²)
Waste Material (0%)+ 0.00 ft²(0.00 m²)

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What Is a Square Footage Calculator?

Find area in square feet and square meters for flooring, tile, paint, or turf — with optional waste factor.

How to Use This Calculator

  1. Choose a shape: Rectangle/square, circle, or triangle.
  2. Select units: Feet, inches, yards, meters, or centimeters.
  3. Enter dimensions: Length and width, radius, or base and height.
  4. Set waste factor: Add 10–15% extra for cutting and layout errors.
  5. Read results: Net area and total area (with waste) in sq ft and sq m.

Area Formulas

Rectangle: Area = Length × Width

Circle: Area = π × r²

Triangle: Area = ½ × Base × Height

Worked Example

A living room measuring 12 ft × 15 ft with a 10% waste factor:

Net area = 12 × 15 = 180 sq ft (≈ 16.72 sq m)

Waste (10%) = 18 sq ft

Total to order = 198 sq ft

Common Use Cases

  • Ordering hardwood, laminate, or carpet for a room
  • Calculating tile for a bathroom or kitchen backsplash
  • Measuring a circular patio or garden bed for pavers or mulch

Frequently Asked Questions

What is a square footage calculator used for?

It estimates surface area of floors, walls, yards, or houses before buying materials — essential for flooring, tiling, turf, paint, and landscaping.

How do you calculate square feet for a rectangle?

Multiply length by width when both are in feet. Example: a 12 ft × 15 ft room = 180 sq ft.

How much extra material should I add for waste factor?

Add 10% for standard layouts and 15% for complex angles, diagonal patterns, or curved borders.

Can this tool calculate non-rectangular spaces?

Yes. Switch to circle or triangle mode for patios, lots, and other non-rectangular areas.

How do I measure an L-shaped room?

Split the room into two or more rectangles, calculate each section, then add the square footage together.

Does the calculator convert to square meters?

Yes. Results display in both square feet and square meters automatically.

What units of measurement are supported?

Feet, inches, yards, meters, and centimeters. The tool converts everything to sq ft and sq m for the final result.