Frequently Asked Questions
Have doubts about land area metrics, survey symbols, or conversion history? Check out our list of detailed answers.
A hectare (ha) is a metric unit of area equal to 10,000 square meters or approximately 2.471 acres. It is widely used around the world for measuring large areas of land, especially in agriculture, forestry, and urban planning. The word "hectare" comes from the Greek word "hekaton" meaning hundred, combined with "are" (a metric unit of area equal to 100 square meters).
An acre is a unit of land area used in the imperial and US customary measurement systems. One acre equals 43,560 square feet, 4,840 square yards, or approximately 4,047 square meters. Historically, an acre was defined as the area of land that could be plowed by a yoke of oxen in one day. It is commonly used in the United States, United Kingdom, and several other countries for real estate and agriculture.
One hectare is equal to exactly 2.47105381 acres. This is a fixed conversion factor based on the precise definitions of both units. To convert any number of hectares to acres, simply multiply the hectare value by 2.47105381. For example, 10 hectares = 10 × 2.47105381 = 24.7105381 acres.
Hectares are part of the metric system and are used internationally for measuring large land areas. They provide a convenient way to express area without dealing with extremely large numbers of square meters. Acres are used primarily in countries that follow the imperial system. Both units simplify the measurement of land for agriculture, real estate, forestry, and land management, making it easier to buy, sell, and manage land parcels.
Hectares are used in most countries worldwide as part of the International System of Units (SI). This includes all European Union countries, Australia, Canada (for land surveying), India, Brazil, China, and most African and Asian nations. It is the standard metric unit for land measurement recommended by the International Bureau of Weights and Measures.
Acres are primarily used in the United States, United Kingdom, Myanmar, and some Caribbean nations. In practice, many countries that officially use the metric system still reference acres in informal real estate and agricultural contexts. The acre remains culturally significant in English-speaking countries, even where the hectare is the official unit.
To convert square meters to acres, you can divide the square meter value by 4,046.8564224 (since one acre is equal to 4,046.8564224 square meters). Alternatively, convert square meters to hectares first (divide by 10,000) and then multiply by 2.47105381.
An acre (43,560 square feet) is slightly smaller than a standard American football field. A standard football field (including the end zones) is 360 feet long and 160 feet wide, which equals 57,600 square feet. Excluding the end zones, the playing field is 300 feet by 160 feet, which is 48,000 square feet, making an acre about 90% of the size of the playing field.