Square Inches to Square Feet Converter

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Convert square inches to square feet using the squared imperial relation: 1 ft = 12 in, so 1 ft² = 144 in² (not 12). Anchors: 144 in² = 1 ft², 720 in² = 5 ft², 1,440 in² = 10 ft². Common in US construction and packaging where small surface areas are tracked in inches but the total is reported in square feet. Browser-local.

Square inch (in²)
Square foot (ft²)

Square inch (in²) → Square foot (ft²)

Quick reference table

Square inch (in²)Square foot (ft²)
1 in²0.0069 ft²
2 in²0.0139 ft²
5 in²0.0347 ft²
10 in²0.0694 ft²
25 in²0.1736 ft²
50 in²0.3472 ft²
100 in²0.6944 ft²

Glossary

Square inch (in²)

A square inch is the area of a square one inch on each side, equal to exactly 0.00064516 m² (since 1 inch = 25.4 mm exactly). It is used in US engineering for cross-sections, packaging and small-component surface areas. 144 in² make one square foot; a standard US envelope flap is about 35 in².

Square foot (ft²)

A square foot equals exactly 0.09290304 m². It is the dominant unit for floor area, real-estate listings and construction in the United States and a few other countries. A typical US apartment ranges 600–1,200 ft²; a standard parking space is about 200 ft². 1 m² ≈ 10.764 ft².

Metric / SI area

In the metric system, area is reported in square meters (SI base) and its scaled units — square millimeter, square centimeter, square kilometer — plus the convenient hectare (10,000 m²) for land. Each step is exactly 100× the previous because area scales as the square of length: 1 m² = 100 dm² = 10,000 cm² = 1,000,000 mm². This squared scaling is the most common manual-conversion error.

Imperial / US Customary area

US customary and UK imperial systems use square inch, square foot, square yard, acre and square mile (144 in² = 1 ft², 9 ft² = 1 yd², 4,840 yd² = 1 acre, 640 acres = 1 mi²). The acre — historically the area a team of oxen could plow in a day — survives as the standard land-parcel unit in the US. Linked to metric by 1 ft² = 0.09290304 m² exactly.

Related tools

Square Feet to Square Inches
Convert ft² to in² — 1 ft² = 144 in²
Square Inches to Square Centimeters
Convert in² to cm² — 1 in² = 6.4516 cm²
Square Feet to Square Yards
Convert ft² to yd² — 9 ft² = 1 yd² (not 3!)
Area Converter
Convert area — mm², cm², m², ha, km², in², ft², yd², acres, mi²