Convert area units — square meters, acres, hectares, square feet, square kilometers.
| Unit | Name | Value |
|---|---|---|
| m² | Square Meter | 10000 |
| km² | Square Kilometer | 0.01 |
| ac | Acre | 2.4710516 |
| ft² | Square Foot | 107639.15 |
| yd² | Square Yard | 11959.906 |
| mi² | Square Mile | 0.0038610188 |
Common hectare values converted to acre — factor: 1 ha = 2.471 ac
| Hectare (ha) | Acre (ac) | Context |
|---|---|---|
| 0.001 ha | 0.002471 ac | Garden |
| 0.01 ha | 0.02471 ac | City lot |
| 0.1 ha | 0.2471 ac | City block |
| 0.5 ha | 1.236 ac | Half hectare |
| 1 ha | 2.471 ac | Football pitch |
| 2 ha | 4.942 ac | Two pitches |
| 5 ha | 12.36 ac | Small farm |
| 10 ha | 24.71 ac | Medium farm |
| 25 ha | 61.78 ac | Large farm |
| 50 ha | 123.6 ac | Small estate |
| 100 ha | 247.1 ac | Large farm |
| 250 ha | 617.8 ac | Large estate |
| 500 ha | 1,236 ac | Nature reserve |
| 1,000 ha | 2,471 ac | Large estate |
| 1e+04 ha | 2.471e+04 ac | Nature park |
Converting hectare to acre is common in real estate, agriculture, surveying, and construction. Property listings, land records, and planning documents often use different area units depending on the country or industry — making accurate conversion essential for cross-border transactions and international comparisons.
As a practical reference: 5 ha = 12.36 acre and 10 ha = 24.71 acre. For larger land areas, 100 ha = 247.1 acre — a common benchmark for farm and estate valuations. The reverse: 1 ac = 0.4047 ha.
All conversions use the internationally recognized factor of exactly 1 ha = 2.471 ac. Calculations are performed in IEEE 754 double-precision floating point, giving accuracy to at least 8 significant figures — more than sufficient for any practical application.
Formula: Acre = Hectare × 2.4710516
Multiply any hectare value by 2.4710516 to get acre. One hectare equals 2.4710516 ac.
Reverse: Hectare = Acre × 0.404686
Hectares × 2.471 = acres. Round to × 2.5 for quick estimates (1.2% high).
One hectare is close to 2.5 acres — good farm planning anchor.
Acres × 0.4047 = ha.
Reports crop area, yield statistics, and subsidy eligibility in hectares.
Measures forest cover, deforestation rates, and reforestation targets in hectares.
Designs city zones, parks, and development areas using hectares.
Quantifies habitat loss, protected area sizes, and land-use change in hectares.
Evaluates large-scale land deals in countries using the metric system.
Plans irrigation, fertilizer, and pesticide application per hectare of cropland.
The hectare is a metric unit equal to 10,000 m² or 2.471 acres, defined in 1795 as part of the French metric system. The name comes from the Latin area and the Greek hekaton (hundred).
Hectares are the global standard for agricultural land measurement, forest inventories, nature reserves, and urban planning across metric countries.
Interesting fact: One hectare of wheat can produce about 3-8 tonnes of grain. The Amazon rainforest covers roughly 550 million hectares.
The acre is a unit of land area equal to 43,560 square feet or about 4,047 m². Its origins trace to medieval England where it represented the amount of land an ox could plough in a day.
Acres remain the standard land measurement unit in the US, UK, Canada, and India for agriculture, real estate, and property transactions.
Interesting fact: A US football field (including end zones) is about 1.32 acres, and a typical suburban house plot in the US is roughly 0.2 acres.