Square Feet to Acres Converter

🔒 Runs in your browser — nothing is sent to a server

Convert square feet to acres using the exact relation 1 acre = 43,560 ft². Anchors: 21,780 ft² = 0.5 acre, 43,560 ft² = 1 acre, 87,120 ft² = 2 acres. Useful when US real-estate lot sizes given in square feet need to be reported as acres for rural and agricultural property listings. Browser-local conversion.

Square foot (ft²)
Acre

Square foot (ft²) → Acre

Quick reference table

Square foot (ft²)Acre
1 ft²0 acre
2 ft²0 acre
5 ft²0.0001 acre
10 ft²0.0002 acre
25 ft²0.0006 acre
50 ft²0.0011 acre
100 ft²0.0023 acre

Glossary

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.

Acre

An acre is exactly 43,560 ft² or about 4,046.86 m² (≈ 0.4047 hectares). The unit dates from medieval England, originally defined as the land a yoke of oxen could plow in a day. Standard for US farmland, real-estate lots and conservation land. 640 acres make one square mile; a typical American suburban house lot is 0.2–0.5 acres.

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

Acres to Square Feet
Convert acres to ft² — 1 acre = 43,560 ft²
Square Feet to Square Yards
Convert ft² to yd² — 9 ft² = 1 yd² (not 3!)
Acres to Hectares
Convert acres to hectares — 1 acre ≈ 0.4047 ha
Area Converter
Convert area — mm², cm², m², ha, km², in², ft², yd², acres, mi²