Square Footage of a Rectangle Calculator

Enter length and width with unit selection to calculate square footage of any rectangular area.

Enter Dimensions

Result

Square Footage
120
sq ft
Length (in feet)12
Width (in feet)10
Square Yards13.333333
Square Meters11.148262

Step-by-Step Solution

How to Calculate Square Footage of a Rectangle

Square footage is the area of a space measured in square feet. For a rectangle, simply multiply the length by the width (both in feet). If your measurements are in other units, convert them to feet first.

Conversion Factors

Inches to Feet

Divide by 12 to convert inches to feet.

1 foot = 12 inches

Yards to Feet

Multiply by 3 to convert yards to feet.

1 yard = 3 feet

Meters to Feet

Multiply by 3.28084 to convert meters to feet.

1 meter = 3.28084 feet

Common Uses

  • Measuring room sizes for flooring, carpet, or tile installation.
  • Calculating paint coverage for walls and ceilings.
  • Estimating material costs for construction projects.
  • Determining lot sizes for real estate listings.
  • Planning garden beds, patios, and outdoor spaces.

Tips for Accurate Measurements

Always measure at the longest and widest points of the space. For irregularly shaped rooms, divide the area into rectangles, calculate each one separately, and add them together. Double-check your unit selections to avoid costly measurement errors.