Square Footage

Square footage measures area in square feet (ft²). One square foot equals a 1 ft × 1 ft area (12 in × 12 in = 144 square inches).

How to Calculate

• Rectangle: Length × Width (10 ft × 12 ft = 120 sq ft)
• Irregular rooms: Break into rectangles, calculate each, then add
• Circular area: π × radius² (convert to feet first)

Common Conversions

• 1 sq ft = 0.0929 sq meters
• 1 acre = 43,560 sq ft
• 1 sq yard = 9 sq ft

Uses

Real estate pricing ($/sq ft), flooring materials, painting (wall sq ft), landscaping, and HVAC sizing.