Loading Calculator...
Please wait a moment
Please wait a moment
Convert acres to hectares instantly with our free online calculator. Essential for agriculture, real estate, land surveying, and international property measurement.
0.404686
Hectares per Acre
2.471
Acres per Hectare
43,560 ft²
Square Feet per Acre
Formula: Hectares = Acres × 0.404686
| Acres | Hectares | Context |
|---|---|---|
| 0.25 ac | 0.1012 ha | Average suburban house lot |
| 0.5 ac | 0.2023 ha | Large residential plot |
| 1 ac | 0.4047 ha | Standard reference acre |
| 2 ac | 0.8094 ha | Small hobby farm |
| 5 ac | 2.0234 ha | Small farm plot |
| 10 ac | 4.0469 ha | Medium agricultural parcel |
| 20 ac | 8.0937 ha | Small vineyard or orchard |
| 40 ac | 16.187 ha | Quarter section (US survey) |
| 50 ac | 20.234 ha | Mid-size farm field |
| 100 ac | 40.469 ha | Large farm field |
| 160 ac | 64.750 ha | Standard homestead (US) |
| 200 ac | 80.937 ha | Medium-size ranch |
| 500 ac | 202.34 ha | Large ranch |
| 640 ac | 259.00 ha | One square mile (section) |
| 1,000 ac | 404.69 ha | Large agricultural estate |
An acre is a unit of land area used primarily in the United States, United Kingdom, and other countries with historical ties to the imperial measurement system. The word comes from the Old English æcer, meaning "open field." In medieval England, an acre was originally defined as the amount of land a yoke of oxen could plow in one day. Today, one acre is precisely defined as 43,560 square feet (4,046.8564224 square meters). An acre can be any shape — it is purely a measure of total area, not dimensions.
A hectare (symbol: ha) is a metric unit of area equal to 10,000 square meters (100 m × 100 m). Introduced alongside the metric system in 1795 during the French Revolution, the hectare is now the standard unit for reporting land area in agriculture, forestry, and urban planning across most of the world. The prefix "hecto" means one hundred, and an "are" is 100 square meters, so a hectare is literally "one hundred ares."
The relationship between these units is straightforward: 1 acre = 0.404686 hectares, or conversely, 1 hectare = 2.47105 acres. Understanding this conversion is essential for international real estate transactions, agricultural trade, environmental reporting, and scientific research where land areas must be communicated across measurement systems.
The formula to convert acres to hectares is: Hectares = Acres × 0.404686. Simply multiply the number of acres by the conversion factor 0.404686 to get the equivalent area in hectares.
Question: A US suburban house sits on a 0.25-acre lot. How many hectares is that?
Question: A farmer owns 40 acres. Convert to hectares for an international crop report.
Note: 40 acres is a "quarter section" in the US Public Land Survey System.
Question: A cattle ranch covers 640 acres (one square mile). How many hectares?
For a quick estimate, multiply acres by 0.4 (slightly less than the exact factor of 0.404686). This gives you a result within 1.2% accuracy. For example: 100 acres × 0.4 = 40 hectares (exact: 40.47). Another trick: divide the acres by 2.5 to get a rough hectare estimate. So 100 acres ÷ 2.5 = 40 hectares. Both shortcuts work well for quick mental calculations.
| Property Type | Acres | Hectares |
|---|---|---|
| Townhouse/condo lot | 0.05 | 0.0202 |
| Small suburban lot | 0.15 | 0.0607 |
| Average suburban lot | 0.25 | 0.1012 |
| Large suburban lot | 0.50 | 0.2023 |
| Rural residential | 1.0 | 0.4047 |
| Country estate | 5.0 | 2.0234 |
| Hobby farm | 10 | 4.0469 |
| Farm Type | Acres | Hectares |
|---|---|---|
| Market garden | 2–5 | 0.8–2.0 |
| Small family farm | 20–50 | 8.1–20.2 |
| Mid-size farm | 100–500 | 40.5–202.3 |
| Large farm (US avg) | 445 | 180.1 |
| Section (1 sq mi) | 640 | 259.0 |
| Large commercial operation | 1,000–5,000 | 404.7–2,023 |
| Industrial mega-farm | 10,000+ | 4,047+ |
| Landmark / Reference | Acres | Hectares |
|---|---|---|
| Football field (US, with end zones) | 1.32 | 0.535 |
| Soccer/football pitch | 1.76 | 0.71 |
| City block (typical US) | 1.5–2.0 | 0.6–0.8 |
| Central Park, NYC | 843 | 341 |
| Disneyland (Anaheim) | 500 | 202 |
| Vatican City | 109 | 44 |
Property listings worldwide use hectares for land area. Americans buying land abroad, or international buyers purchasing US property, need accurate acre-to-hectare conversion to compare prices and plot sizes across markets.
International agricultural data, commodity pricing, and yield reporting commonly use hectares. Farmers involved in export markets or applying for international certifications need to convert their acreage to hectares for compliance and communication.
Deforestation rates, conservation areas, and carbon offset calculations are typically reported in hectares globally. Researchers and policy makers need conversion fluency to interpret and compare environmental data across jurisdictions.
International land title documents and surveying standards increasingly use metric units. Surveyors, attorneys, and title companies handling cross-border transactions must accurately convert between acres and hectares for legal descriptions.
Four decimal places (0.4047) gives accuracy within 0.004% — plenty for most real estate and agricultural purposes.
This inverse relationship helps sanity-check your results. If you get a hectare number bigger than your acre number, something went wrong.
Acres to hectares requires multiplication by 0.404686. Dividing by 0.404686 would give hectares to acres — the wrong direction.
They are technically the same thing (1 ha = 1 hm²), but in practice, land area is always expressed in hectares, never square hectometers.
This common mistake overestimates by 24%. The correct approximation is 0.4 hectares per acre.
One acre equals exactly 0.404686 hectares. This means an acre is roughly 40% of a hectare. To convert any number of acres to hectares, multiply by 0.404686. For example, 10 acres equals 4.04686 hectares.
A hectare is larger than an acre. One hectare equals approximately 2.471 acres. So a hectare is about 2.5 times the size of an acre. A hectare is 10,000 square meters (100m × 100m), while an acre is 4,046.86 square meters.
Multiply the number of acres by 0.404686. For example: 5 acres × 0.404686 = 2.023 hectares. For a quick mental estimate, multiply acres by 0.4 (slightly less accurate but easy to calculate in your head).
One acre equals exactly 43,560 square feet. This is equivalent to 4,840 square yards, or about 4,046.86 square meters. An acre can be any shape — it does not have to be a square or rectangle.
A hectare is 100 meters by 100 meters (10,000 square meters). It is roughly the size of a standard rugby pitch or about 1.2 times a regulation football (soccer) field. For an American comparison, a hectare is about 2.47 football fields without end zones.
Acres come from the imperial measurement system used in the United States, United Kingdom, and a few other countries. Hectares are part of the metric system adopted by most of the world. International real estate, agriculture, and science predominantly use hectares for standardization.
An American football field (including end zones) is about 1.32 acres or 0.535 hectares. Without end zones, the playing field is approximately 1.1 acres or 0.445 hectares. A soccer (football) pitch varies but is typically around 1.76 acres or 0.71 hectares.
Yes. The international acre is defined as exactly 4,046.8564224 square meters. Since a hectare is exactly 10,000 square meters, one acre equals exactly 0.40468564224 hectares. The commonly used factor 0.404686 is rounded to six decimal places, which is accurate enough for virtually all practical purposes.
This calculator uses the internationally recognized conversion factor of 1 acre = 0.40468564224 hectares. For legal land descriptions, surveying, and official documents, always verify conversions with a licensed surveyor or refer to your jurisdiction's official measurement standards.