Acres to Hectares Converter
Convert acres to hectares instantly, a reliable tool for agriculture, real estate development, and international land surveys.
Result in Hectares
US Land Measurement Standards
In the United States, the acre is the official unit of measure for land area, used in everything from residential deeds to massive federal forest preserves. However, as international agricultural trade and scientific research become more unified, the hectare (the metric standard) is increasingly common in US export reports and environmental conservation studies.
Whether you're a US developer looking at an international property listing or a farmer calculating yields for global markets, this tool provides the precision needed for American land surveys and metric transitions.
Brief History of the Units
Acre: The Day's Work
In medieval times, an acre was defined as the amount of land a pair of oxen could plow in a single day. It was traditionally a long narrow strip of land, one furlong (660 ft) long by one chain (66 ft) wide.
Hectare: The Metric Standard
Established in 1795 as part of the French Revolution's metric system, the hectare (10,000 m²) simplified land measurement into a decimal system. The name comes from "hecto" (100) and "are" (100 m²).
What is an Acre?
An acre = 43,560 square feet. This is approximately 4,047 square meters or roughly 90% of a standard football field.
What is a Hectare?
Derived from "hecto" (100) and "are" (100 square meters), 1 hectare = 10,000 square meters. It is equal to exactly 1 square hectometer.
How to Convert (The Formula)
INTERNATIONAL CONVERSION FACTOR
ha = acres × 0.40468564
Step-by-Step Guide
1Identify the number of acres you wish to convert.
2Multiply that number by 0.40468564 (or 0.4047 for a quick estimate).
3The resulting number is the area in hectares (ha).
Mental Math Trick
"If you have 10 acres, you have roughly 4 hectares. To get a closer number, multiply by 4 and divide by 10."
Inverse conversion: 1 hectare ≈ 2.471 acres
Agriculture & Registry
- Agricultural Land Valuation
- Agricultural Subsidies
- International Land Sale
- Forest Density Mapping
Regional Variation
The US Survey Acre differs very slightly from the International Acre (by about 2 parts per million). Using this calculator uses the precision International standard suitable for all modern engineering and property records.
Acres to Hectares Conversion Table
Acres Hectares (ha) Corn (kg) Soybeans (kg) Wheat (kg) Cotton (kg) 1 ac 0.40 8 25 40 10 2.47 ac 1.00 20 62 99 25 5 ac 2.02 40 125 200 50 10 ac 4.05 80 250 400 100 20 ac 8.09 160 500 800 200 50 ac 20.23 400 1,250 2,000 500 100 ac 40.47 800 2,500 4,000 1,000 250 ac 101.17 2,000 6,250 10,000 2,500 500 ac 202.34 4,000 12,500 20,000 5,000 1000 ac 404.69 8,000 25,000 40,000 10,000 Relatable US Land Benchmarks
American Football Field
1.32 Acres
≈ 0.53 ha
Average US Suburban Block
2.5 Acres
≈ 1.01 ha
Major League Baseball Field
4.5 Acres
≈ 1.82 ha
White House Grounds
18 Acres
≈ 7.28 ha
Disneyland Park (CA)
85 Acres
≈ 34.40 ha
Central Park (NYC)
843 Acres
≈ 341.15 ha
US Land Survey Units (PLSS)
In the United States, land is traditionally managed under the Public Land Survey System (PLSS). Understanding how Acres fit into this system is essential for US property records.
Section
A standard 'Section' in the US is 1 square mile, which equals exactly 640 Acres or ~259 Hectares.
Quarter-Section
Commonly associated with the historical Homestead Act, a Quarter-Section is 160 Acres (~64.7 Hectares).
Township
A full US Survey Township consists of 36 sections, totaling 23,040 Acres or ~9,324 Hectares.
Frequently Asked Questions