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A square foot (ft²) denotes the area of a square whose sides each measure exactly one foot (0.3048 m) in length. It is an established unit of area in both the Imperial and US customary systems, commonly abbreviated as sq ft or ft². One sq ft equals 144 square inches and approximately 0.092903 m².
The foot traces back to ancient anthropomorphic measures used by Egyptians, Greeks, and Romans, later standardized in medieval England under King Henry I (reigned 1100–1135). As land and textile trades required two‑dimensional measures, the square foot naturally emerged in the 13th century alongside yard and rod units. Its formal codification in 1824 by the British Weights and Measures Act entrenched it across the Empire and, subsequently, the United States.
Today, the square foot remains the principal area unit in the United States and parts of the UK, underpinning real estate listings, construction plans, and interior design specifications. Architects and builders calculate material quantities—such as flooring, drywall, and paint—by square feet to streamline procurement and cost estimation. Retailers of carpets, countertops, and pavers also price products per square foot, ensuring precise ordering and minimal waste.
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Unit | 1 Square feet |
---|---|
Square inches | 144 sq in |
Square yard | 0.111111111 sq yd |
Square meters | 0.09290304 sq mt |
Square centimeters | 929.0304 sq cm |
Acre | 0,000023 acre |
Hectare | 0,000009 ha |
Cent | 0,002296 cent |
Ares | 0,000929 ares |
A square meter (m²) is the SI‑derived unit of area defined by a square whose sides each measure exactly one meter in length. It is the foundational metric measure for two‑dimensional space and is universally abbreviated as m² or sq m.
The metre was introduced by the French Academy in 1791, formalized in 1795, to replace disparate regional units with a decimal-based standard. The square meter emerged concurrently as the natural area unit once linear measures became uniform, facilitating scientific precision and international collaboration.
Today, the square meter underpins area measurement in nearly all countries, from real estate listings and architectural plans to lab work and agriculture. Its coherence with SI prefixes (e.g., km², cm²) ensures seamless scalability across applications in engineering, urban planning, and environmental science.
Square Feet | Square Meter |
---|---|
1 sq ft | 0,092903 sq m |
2 sq ft | 0,185806 sq m |
3 sq ft | 0,278709 sq m |
4 sq ft | 0,371612 sq m |
5 sq ft | 0,464515 sq m |
6 sq ft | 0,557418 sq m |
7 sq ft | 0,650321 sq m |
8 sq ft | 0,743224 sq m |
9 sq ft | 0,836127 sq m |
10 sq ft | 0,929030 sq m |
11 sq ft | 1,021933 sq m |
12 sq ft | 1,114836 sq m |
13 sq ft | 1,207739 sq m |
14 sq ft | 1,300642 sq m |
15 sq ft | 1,393545 sq m |
16 sq ft | 1,486448 sq m |
17 sq ft | 1,579351 sq m |
18 sq ft | 1,672254 sq m |
19 sq ft | 1,765157 sq m |
20 sq ft | 1,858060 sq m |
Aspect | Square Foot (ft²) | Square Meter (m²) |
---|---|---|
Definition | Area of a square with 1-foot sides | Area of a square with 1-meter sides |
Measurement System | Imperial & US customary units | International System of Units (SI) |
Conversion Factor | 1 ft² = 0.092903 m² | 1 m² = 10.76391 ft² |
Symbol & Abbreviation | ft² or sq ft |
m² or sq m |
Common Applications | Real estate listings, flooring, interior design, construction estimates | Architectural plans, land area, scientific measurements, international trade documentation |