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Key Features
Instant Calculation
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Square footage is the starting point for almost every home project estimate — flooring, paint, tile, and real estate listings all key off it.
This calculator finds the square footage of a rectangular space from its length and width, with an optional cost estimate.
How it works
Enter the length and width of the space in feet. The calculator multiplies them to find the area in square feet, converts it to square yards, and — if you enter a price per square foot — estimates the total cost.
- Enter length (ft).
- Enter width (ft).
- Enter price per square foot (optional, $).
- Click Calculate to see your results.
Examples
A 20×15 ft room
A 20 ft by 15 ft room is 300 square feet (33.3 square yards). At $3.50 per square foot, that's an estimated $1,050 total.
Who should use it
- Estimating flooring, paint, or tile costs for a room.
- Calculating a home or listing's square footage for real estate purposes.
Industry applications
- Home improvement and renovation
- Real estate listings and appraisals
Advantages
- Instantly converts between square feet and square yards.
- Optionally estimates total material cost from a price per square foot.
Limitations
- Only handles simple rectangular areas — complex shapes need to be split into sections.
Common mistakes to avoid
- Measuring in inches and forgetting to convert to feet before calculating.
- Not accounting for waste when ordering materials based on the calculated square footage.
Best practices
- Measure the longest points of a room (wall to wall) rather than just the visible floor area, especially around cabinets or built-ins.
Tips
- When comparing material prices quoted per square yard against your square-footage measurement, remember 1 square yard equals 9 square feet.