Free area calculator
Calculate square footage for rooms, floors, paint, and tile.
Enter length and width to estimate square feet, square yards, cost, and waste allowance for common home and project planning tasks.
1 sq yd9 sq ft
1 acre43,560 sq ft
10%common flooring waste
350sq ft per paint gallon
Project calculators
Pick the area tool that matches your project.
Use square footage for a room, then move into flooring, paint, tile, or unit conversion when you need a more specific estimate.
Room Square Footage Calculator
Add multiple rooms and get a total area for a floor plan or project list.
Flooring Square Footage Calculator
Estimate flooring area, waste allowance, boxes, and material cost.
Paint Square Footage Calculator
Estimate wall area and gallons after doors, windows, coats, and coverage.
Tile Square Footage Calculator
Convert room area and tile size into estimated tile count with waste.
Square Feet To Square Yards
Convert square feet to square yards for carpet, turf, fabric, and flooring.
How it works
The basic square footage formula.
For a rectangle or square, multiply length by width. If you measure in inches, yards, or meters, convert to feet first.
Square feet = length in feet x width in feet
12 ft x 10 ft
120 square feet
15 ft x 14 ft
210 square feet
20 ft x 12 ft
240 square feet
MicroToolForge
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MicroToolForge builds small quote estimators, project calculators, and lead-generation tools for service businesses.