Square Footage Calculator
Square footage is the most common measurement used in real estate, construction, and interior design to describe the area of a room or space. To calculate it, simply multiply the length by the width of the space in feet. If you have multiple identical rooms, enter the quantity to get the combined total area automatically.
This calculator also supports metric measurements in square meters (m²) and can optionally compute your total project cost when you provide a price per square foot or square meter — making it easy to estimate flooring, tile, carpet, paint, or any other material that's sold by the unit area.
How it works
Area = Length × Width × Quantity. If the unit is feet, the result is in ft²; multiply by 0.092903 to convert to m². If the unit is meters, multiply by 10.7639 to convert to ft².
Use cases
- Estimating flooring or carpet needed for a room
- Calculating tile or hardwood for kitchens and bathrooms
- Determining paint coverage for walls or ceilings
- Measuring total living space for real estate listings
- Planning landscaping or garden bed areas
Frequently asked questions
How do I calculate square footage of a room?
Multiply the length by the width of the room in feet: Area = Length × Width. For example, a 12 ft by 10 ft room is 120 square feet. If you have several identical rooms, enter the quantity and the calculator multiplies the area accordingly.
How do I convert square feet to square meters?
Multiply the square footage by 0.092903 to get square meters. For example, 500 ft² equals about 46.45 m². To go the other way, multiply square meters by 10.7639 to get square feet, which is exactly what this calculator does when you switch units.
How do I calculate the area of a non-rectangular room?
Divide the space into rectangular sections, calculate each one's area separately, then add them together. For an L-shaped room, split it into two rectangles and sum the results. Enter each section as a separate calculation or use the quantity field for identical sections.
How much flooring should I buy for my square footage?
Start with your total area, then add about 5–10% extra for cuts, waste, and pattern matching. For example, a 200 ft² room typically needs around 210–220 ft² of flooring purchased. Enter a price per square foot or square meter and the calculator estimates your total material cost.
How do I estimate material cost from square footage?
Multiply your total area by the price per unit area: Cost = Area × Price per square foot (or square meter). For instance, 150 ft² at $3 per ft² costs $450. This calculator computes that total automatically when you enter a unit price.