Hectare to Acre Conversion Calculator: Free Online Tool
Convert hectares to acres with our free online area converter.
Hectare to Acre Calculator
How to Use the Calculator:
- Enter the value you want to convert in the 'From' field (Hectare).
- The converted value in Acre will appear automatically in the 'To' field.
- Use the dropdown menus to select different units within the Area category.
- Click the swap button (⇌) to reverse the conversion direction.
How to Convert Hectare to Acre
Converting Hectare to Acre involves multiplying the value by a specific conversion factor, as shown in the formula below.
Formula:
1 Hectare = 2.471054 acresExample Calculation:
Convert 10 hectares: 10 × 2.471054 = 24.71054 acres
Disclaimer: For Reference Only
These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.
Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.
What is a Hectare and a Acre?
The hectare (symbol: ha) is a metric unit of area defined as 10,000 square meters (100 m x 100 m), and primarily used in the measurement of land.
The acre (symbol: ac) is a unit of land area used in the imperial and US customary systems. It is traditionally defined as the area of one chain by one furlong (66 by 660 feet), which is exactly equal to 1/640 of a square mile, 43,560 square feet, or about 4,047 square meters.
Note: The Hectare is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Acre belongs to the imperial/US customary system.
History of the Hectare and Acre
Introduced during the French Revolution with the original metric system in 1795, the hectare provided a convenient metric unit for land measurement, larger than the square meter but smaller than the square kilometer. It gained widespread international acceptance, particularly with the adoption of the SI system, becoming the standard for land sales and management in many countries.
The acre originated in medieval England as the amount of land tillable by one man behind one ox in one day. Its size varied historically but was standardized under the Weights and Measures Act of 1878 in the UK. It remains a common unit for land measurement in several countries, especially for agricultural and large residential plots.
Common Uses for hectares and acres
Explore the typical applications for both Hectare (imperial/US) and Acre (imperial/US) to understand their common contexts.
Common Uses for hectares
- Land Measurement (Global Metric): The primary unit for selling and managing land, especially agricultural land, forestry, and large real estate plots, in most countries worldwide using the metric system.
- Agriculture & Forestry: Standard unit for reporting crop yields, farm sizes, and forest areas.
- Urban Planning: Measuring parks, large developments, and zoning areas.
- Environmental Management: Quantifying the area of conservation zones or affected land areas.
Common Uses for acres
- Land Measurement (US/UK etc.): Standard unit for measuring plots of land, especially farms, large residential lots, and undeveloped land in the US, UK, Canada, Australia, India, and other Commonwealth countries.
- Real Estate: Used in property listings and surveys for land parcels.
- Agriculture: Common unit for describing farm sizes and field areas.
Frequently Asked Questions
Questions About Hectare (ha)
How many square meters are in a hectare?
There are exactly 10,000 square meters in one hectare.
How many acres are in a hectare?
One hectare is equal to approximately 2.471 acres.
How many hectares are in a square kilometer?
There are 100 hectares in one square kilometer (since 1 km² = 1,000,000 m² and 1 ha = 10,000 m²).
Is the hectare an official SI unit?
While not technically an SI unit (the SI unit of area is the square meter), the hectare is accepted for use with the International System of Units (SI) and is the standard metric unit for land area globally.
About Acre (acre)
How big is an acre visually?
An acre is roughly 90% of the size of an American football field (including the end zones).
How many square feet are in an acre?
There are exactly 43,560 square feet in one acre.
How many acres are in a hectare?
One hectare contains approximately 2.471 acres.
Is the acre used worldwide?
While common in the US, UK, and Commonwealth countries, it is not part of the metric system (SI) and is less common globally than the hectare or square meter for land measurement.
Conversion Table: Hectare to Acre
| Hectare (ha) | Acre (acre) |
|---|---|
| 1 | 2.471 |
| 5 | 12.355 |
| 10 | 24.711 |
| 25 | 61.776 |
| 50 | 123.553 |
| 100 | 247.105 |
| 500 | 1,235.527 |
| 1,000 | 2,471.054 |