What is square footage?
Square footage is the area of a two-dimensional surface measured in square feet (ft²). One square foot equals the area of a square with sides one foot long. It is the standard unit of area in the United States and other countries that use the imperial measurement system, and is widely used in real estate, construction, and home improvement to describe the size of rooms, floors, and properties.
How do you calculate square footage?
For a rectangular room or surface, multiply the length by the width: Area (ft²) = Length (ft) × Width (ft). For example, a room that is 10 feet long and 12 feet wide has an area of 10 × 12 = 120 square feet. If your measurements are in meters, multiply length × width first to get square meters, then multiply by 10.764 to convert to square feet. This calculator handles both automatically.
What is the square footage formula?
The formula for a rectangle is: Area = Length × Width. In imperial units: ft² = ft × ft. In metric units: m² = m × m. To convert between them: 1 ft² = 0.0929 m² and 1 m² = 10.764 ft². For an L-shaped room, split it into two rectangles, calculate each area separately, and add them together. For a room measured in inches, divide each dimension by 12 before multiplying.
What are some square footage examples?
Living room (imperial): 15 ft × 18 ft = 270 ft² (25.08 m²). Bedroom (metric): 3.5 m × 4 m = 14 m² (150.7 ft²). Kitchen: 10 ft × 10 ft = 100 ft² (9.29 m²). Studio apartment: 6 m × 8 m = 48 m² (516.67 ft²). These figures help you estimate how many tiles, liters of paint, or rolls of flooring you need before starting a renovation.
When is square footage useful?
Square footage is essential whenever you need to buy materials based on surface area. Flooring, carpeting, and tiling are sold by the square foot or square meter, so knowing your room area tells you exactly how much to order. It is also used when renting or buying property (listed square footage defines the living area), for HVAC sizing, and for estimating paint quantities when decorating walls and ceilings. Insulation is another major use — area directly determines how many bags of insulation a space requires.
How do you convert square feet to square meters?
Multiply square feet by 0.0929 to get square meters: m² = ft² × 0.0929. To go the other way, multiply square meters by 10.764: ft² = m² × 10.764. For example, 500 ft² = 500 × 0.0929 = 46.45 m². 30 m² = 30 × 10.764 = 322.92 ft². The area converter can handle other units like acres, hectares, and square yards if you need broader conversions.
How much extra square footage should I add for flooring or tiling?
Always order more material than the calculated area to account for cuts, waste, and future repairs. Add 10% for straight-layout flooring and tile in standard rectangular rooms. Use 15% for rooms with alcoves, multiple angles, or complex layouts where off-cuts are frequent. For diagonal or herringbone patterns, add 15–20% because every plank or tile is cut at an angle, producing significantly more waste. For example, a 120 ft² room with a straight tile layout needs 120 × 1.10 = 132 ft² ordered. The same room with a diagonal pattern needs 120 × 1.20 = 144 ft² ordered. Use the tile calculator to get a precise count including your chosen waste factor.