AreaConverter
Instantly convert area units including Square Centimeter, Square Meter, and more.
About Area Units
Area quantifies the size of a two-dimensional surface. The SI unit is the square meter (m²); larger land areas use hectares (1 ha = 10,000 m²) and square kilometers (1 km² = 100 ha). In the US customary and imperial systems, square feet (ft²) and acres are most common. A key fact often overlooked is that area units scale as the square of their linear counterparts: 1 km = 1,000 m, but 1 km² = 1,000,000 m². This quadratic relationship is a frequent source of errors when converting between systems, particularly in real estate and cartography.
Land measurement has its own rich history. The acre originally represented the amount of land one man could plow in a single day with a yoke of oxen — a practical agricultural standard. When the English settlers brought their units to America, the acre traveled with them. The hectare emerged from France's 1795 metric reform, defined as a square 100 meters on a side. Countries that industrialized under British influence — the US, Canada, Australia — used acres for farmland well into the 20th century, while continental Europe adopted the metric hectare. Today, most of the world uses hectares and square kilometers for official land registers, but acres remain the everyday unit in the United States.
Area conversion has concrete implications in real estate, environmental science, and urban planning. A property listed at 0.5 acres is approximately 2,023 m² — about the size of three typical suburban house lots in Europe. A farmer comparing crop yields between a US study (in acres) and a European one (in hectares) must convert carefully: 1 hectare = 2.471 acres. National park rangers in the US track fire sizes in acres while their Canadian counterparts use hectares. Architects and engineers must reconcile square feet (US drawings) with square meters (international specifications) on global projects.
Common Area Conversions
| From | To |
|---|---|
| 1 acre | 4,046.86 m² — 0.4047 ha |
| 1 hectare | 10,000 m² — 2.471 acres |
| 1 km² | 100 ha — 247.105 acres |
| 1 mi² | 2.59 km² — 640 acres |
| 1 ft² | 0.0929 m² |
| 1 m² | 10.7639 ft² |
| 1 cm² | 0.155 in² |
| 1 in² | 6.4516 cm² |
| 1 yd² | 0.8361 m² |
| 1 ha | 0.01 km² = 10,000 m² |
| 100 ft² | 9.2903 m² |
| 1 acre | 43,560 ft² = 4,840 yd² |
| 1 m² | 1,550 in² = 10,000 cm² |
| 1 km² | 0.386102 mi² |
| 1 mi² | 640 acres = 258.999 ha |
Frequently Asked Questions
Exactly 43,560 square feet equal one acre. This comes from the original definition: 1 furlong (660 ft) × 1 chain (66 ft) = 43,560 ft².
One hectare equals approximately 2.471 acres. Conversely, 1 acre ≈ 0.4047 hectares.
1 km² = 100 hectares. A hectare is 10,000 m² (100 m × 100 m); a square kilometer is 1,000,000 m² (1,000 m × 1,000 m).
A standard American football field including end zones is about 100 yards × 53.33 yards ≈ 0.536 hectares (1.32 acres). A standard international football (soccer) pitch is 0.7–0.8 hectares.
There are exactly 9 square feet in one square yard (3 ft × 3 ft = 9 ft²). Carpet and flooring are still sometimes sold by the square yard in the United States.
Because area is two-dimensional, it scales as the square of any linear dimension. If you double the side of a square, the area quadruples. That is why 1 km = 1,000 m but 1 km² = 1,000,000 m². This 'square law' is a common source of conversion errors.
The median new US single-family home is about 2,300 ft² (214 m²). A typical new apartment in western Europe is 70–100 m² (750–1,075 ft²). The US home is notably larger than homes in most other countries.
Multiply square meters by 10.7639 to get square feet. For example, 50 m² × 10.7639 ≈ 538 ft². To reverse it, multiply square feet by 0.0929.