Convert area units instantly — square feet, square meters, acres, hectares, square yards, square miles, and more. Click any result to copy it.
Real estate area conversions for home listings, floor plans, and property comparisons. Enter the square footage or square meters.
Agricultural and land area conversions. Acres and hectares are the primary units used in farming, land deeds, and real estate.
Area measurement varies significantly by industry and country. Real estate in the United States uses square feet and acres. European and international real estate uses square meters and hectares. Agriculture worldwide uses acres (US, UK, Canada) or hectares (metric countries). Understanding conversions between these is essential for anyone buying land, comparing international properties, or working in construction.
The most important area conversion to memorize: 1 acre = 43,560 square feet. This comes from the historical definition of an acre as the area a yoke of oxen could plow in a day — originally 1 furlong (660 feet) by 1 chain (66 feet). In metric: 1 hectare = 10,000 square meters (a 100m × 100m square). The bridge between the two systems: 1 hectare ≈ 2.471 acres, or roughly 2.5 acres.
| Unit | Symbol | = Square Meters | Common Use |
|---|---|---|---|
| Square millimeter | mm² | 0.000001 m² | Engineering, precision parts |
| Square centimeter | cm² | 0.0001 m² | Small surfaces, skin area |
| Square inch | in² | 0.000645 m² | Paper, screen sizes, tiles |
| Square foot | ft² | 0.0929 m² | US real estate, rooms |
| Square yard | yd² | 0.8361 m² | Carpeting, sports fields |
| Square meter | m² | 1.000 m² | International real estate |
| Are | a | 100 m² | Rarely used (1/100 hectare) |
| Acre | ac | 4,046.86 m² | US/UK land, real estate |
| Hectare | ha | 10,000 m² | Metric land, agriculture |
| Square kilometer | km² | 1,000,000 m² | Country/city areas |
| Square mile | mi² | 2,589,988 m² | US geography, census |
Area measurement units evolved independently across cultures based on practical farming and land ownership needs. The acre derives from the Old English "æcer," originally meaning open field. It was standardized as the area one man with one ox could plow in a day — roughly 43,560 square feet under the furlong-chain system. The hectare was invented in 1795 during the French metric revolution, designed as a clean 100m × 100m square (10,000 m²). The square foot traces to ancient Roman and English body-based measurements, where one foot (roughly 30.5 cm) was a standard building unit. Understanding this history explains why 1 acre = 43,560 ft² rather than some round number — it preserves a medieval agricultural reality in a post-decimal world.
The US and Canada use square feet for residential floor area and acres for land. The UK uses square feet for floor area but has transitioning land measurement (acres still common in rural areas). Australia, New Zealand, and Europe primarily use square meters for floor area and hectares for land. When buying international property, always clarify which unit is being used — a "250" could mean 250 m² (2,691 ft², a large home) or 250 ft² (a studio apartment).
Flooring contractors typically quote prices per square foot (US) or per square meter (international). When ordering carpet, most US suppliers sell by the square yard — divide your square footage by 9 to get square yards. Always add 10–15% for waste, pattern matching, and seams. For a 15 × 20 foot room: 300 sq ft ÷ 9 = 33.3 sq yd, plus 10% waste = 36.7 sq yd to order. Hardwood, tile, and laminate are typically sold by the box, with each box covering 15–25 square feet depending on the product.
Paint is sold by coverage area — typically 350–400 square feet per gallon for smooth surfaces, 250–300 sq ft for textured walls. To calculate wall area: measure perimeter (add all wall widths), multiply by ceiling height, subtract door (20 sq ft each) and window (15 sq ft each) areas. For a 12×15 room with 9-foot ceilings: perimeter = 54 ft, wall area = 54 × 9 = 486 sq ft, minus 2 doors (40 sq ft) and 2 windows (30 sq ft) = 416 sq ft, requiring roughly 1.2 gallons per coat. Most rooms need two coats.
Mulch, soil amendments, and seed are typically sold per cubic yard (volume) rather than area, but coverage area determines how much you need. A 3-inch mulch layer over 100 square feet needs about 1 cubic yard. For lawn areas, seed is sold per 1,000 square feet. Fertilizer coverage varies by product. To convert your lawn from acres to square feet for product calculations: multiply acres by 43,560. A quarter-acre yard is 10,890 sq ft — enough to see why commercial-grade equipment differs from residential.
Real estate square footage measurement is not standardized in the US, leading to significant discrepancies between listings. The American National Standards Institute (ANSI) Z765 standard (used by Fannie Mae) measures above-grade finished living area — excluding garages, unfinished basements, and areas with ceilings below 5 feet. Many listing agents include below-grade finished basements, producing larger numbers. When comparing properties, always verify what is and is not included in the reported square footage. A 2,000 sq ft listing might be 1,400 sq ft above grade plus a 600 sq ft finished basement.
| Property Type | Typical Sq Ft | Sq Meters | Acres |
|---|---|---|---|
| Studio apartment | 300–500 | 28–46 | — |
| 1-bedroom apartment | 500–800 | 46–74 | — |
| 2-bedroom apartment | 800–1,200 | 74–111 | — |
| Small house | 1,000–1,500 | 93–139 | — |
| Average US home (2024) | ~2,000 | ~186 | — |
| Large home | 3,000–5,000 | 279–465 | — |
| Typical urban lot | 5,000–8,000 | 465–743 | 0.11–0.18 |
| Suburban quarter-acre lot | 10,890 | 1,012 | 0.25 |
| Half-acre lot | 21,780 | 2,023 | 0.50 |
| 1-acre lot | 43,560 | 4,047 | 1.00 |
An acre is 43,560 square feet — roughly the size of a standard American football field (360 × 160 feet = 57,600 ft², so just over 1.3 acres excluding end zones). A quarter-acre lot (10,890 sq ft) is a typical suburban home site. A half-acre (21,780 sq ft) gives meaningful yard space. Five acres begins to feel rural. Forty acres historically represented a minimum self-sufficient farm parcel in the Homestead Acts — the origin of the phrase "40 acres and a mule."
A hectare is exactly 10,000 square meters — it is the standard unit of land area in the metric system and is used by most of the world outside the United States and United Kingdom for agricultural and land registry purposes — a square 100 meters on each side. One hectare equals approximately 2.471 acres. In Europe, small farms might be measured in hectares (5–50 ha). Large agricultural operations in Australia or the American West might be thousands of hectares. A regulation FIFA soccer field is 0.7–0.8 hectares. The Vatican City covers 44 hectares. Central Park in New York is 341 hectares (843 acres).
Visualizing an acre is easier with reference points. One acre = 43,560 square feet. If you drew a square with sides of about 208.7 feet (roughly 70 yards), that would be exactly one acre. Other references: one acre is approximately 75% of a standard American football field (from end zone to end zone). A standard city block varies from about 2 to 5 acres depending on the city. In Manhattan, a city block is roughly 5–6 acres. A typical large suburban backyard is about 0.2–0.5 acres. Ten acres is roughly 7 standard city blocks or a small neighborhood park.
The US Public Land Survey System divides land into 6-mile-square townships, each containing 36 sections of 1 square mile (640 acres). A section can be divided into quarters (160 acres each), quarter-quarters (40 acres), and so on. When you see a legal description like "the NW¼ of Section 12," it refers to the northwest quarter — 160 acres. This system covers most of the US west of Ohio and explains common farm sizes like 40, 80, 160, and 320 acres.
| From | To Square Feet | To Square Meters | To Acres | To Hectares |
|---|---|---|---|---|
| 1 square foot | 1 | 0.0929 | 0.0000230 | 0.00000929 |
| 1 square meter | 10.764 | 1 | 0.000247 | 0.0001 |
| 1 square yard | 9 | 0.836 | 0.000207 | 0.0000836 |
| 1 acre | 43,560 | 4,046.86 | 1 | 0.4047 |
| 1 hectare | 107,639 | 10,000 | 2.471 | 1 |
| 1 square mile | 27,878,400 | 2,589,988 | 640 | 258.999 |
| 1 square kilometer | 10,763,910 | 1,000,000 | 247.105 | 100 |