Square Feet (ft²) to Square Inches (in²) Converter
Enter a value to instantly convert between area units.
1 Square Foot = 144 Square Inch
Key Formulas
Acre → Square Foot
ft² = ac × 43560Square Foot → Acre
ac = ft² × 0.0000229568Hectare → Acre
ac = ha × 2.47105Acre → Hectare
ha = ac × 0.404686Formula
in² = ft² × 144A square foot is exactly 144 square inches — 12 inches on each side. This is one of the most intuitive area conversions: multiply ft² by 144 to get in². US construction professionals use this constantly for material quantities, room sizes, and building code compliance.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
A carpenter confirming 1 ft² = 144 in² for lumber takeoff calculations.
1 ft² = 144 in²
A flooring contractor converting 10 ft² bathroom to 1440 in² for tile estimation (6×6 in tiles).
10 ft² = 1440 in²
A roofer converting 100 ft² roof section to 14,400 in² for shingle calculation (bundles cover 33.3 ft²).
100 ft² = 14400 in²
A drywall installer converting 1000 ft² ceiling area to in² for joint compound estimation.
1000 ft² = 144000 in²