Acre (ac)
An acre is 43,560 square feet, or exactly 4,046.8564224 square meters — a traditional land measure.
Acres parcel farmland, suburban lots, and parks in the United States, UK, and several Commonwealth countries.
Acre to Hectare
Convert acre to hectare instantly. Type in either field — results update live.
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Area Acre Hectare
1 acre = 0.4046856422 hectares
Unit
Unit
Conversion table
Selected ac values converted to ha using the exact factor from this tool.
| ac | ha |
|---|---|
| 0.01 | 0.0040468564 |
| 0.1 | 0.0404685642 |
| 1 | 0.4046856422 |
| 2 | 0.8093712845 |
| 3 | 1.2140569267 |
| 5 | 2.0234282112 |
| 10 | 4.0468564224 |
| 20 | 8.0937128448 |
| 50 | 20.234282112 |
| 100 | 40.468564224 |
| 1,000 | 404.68564224 |
How to convert
Exact conversion factors in both directions, plus a worked example.
1 ac = 0.4046856422 ha
1 ha = 2.4710538147 ac
To convert acre to hectare, multiply by 0.4046856422.
To convert hectare to acre, multiply by 2.4710538147.
Example: convert 10 ac to ha
10 × 0.4046856422 = 4.0468564224 ha
About these units
Short background on the units used in this conversion.
Hectare (ha)
A hectare is 10,000 square meters, or exactly one hundred ares — a practical field for large plots.
Hectares report forest cover, vineyard size, and agricultural statistics in metric countries.
Frequently asked questions
How many hectares are in one acre?
One acre equals 0.4046856422 hectares. Multiply your acres value by 0.4046856422 to convert to hectares.
What is the conversion formula?
ha = ac × 0.4046856422The reverse is
ac = ha × 2.4710538147, using the same exact factors as this converter.Is this Acre to Hectare converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.
All acre conversions
Jump to any area conversion starting from acre — including the reverse direction and every other unit in our dataset.
hectare (ha) → acre (ac)
acre (ac) → square meter (m²)acre (ac) → square kilometer (km²)acre (ac) → square centimeter (cm²)acre (ac) → square millimeter (mm²)acre (ac) → square micrometer (µm²)acre (ac) → square nanometer (nm²)acre (ac) → square decimeter (dm²)acre (ac) → square dekameter (dam²)acre (ac) → square hectometer (hm²)acre (ac) → are (a)acre (ac) → barn (b)acre (ac) → square mile (mi²)acre (ac) → square mile (us survey) (mi² surv)acre (ac) → sectionacre (ac) → square yard (yd²)acre (ac) → square foot (ft²)acre (ac) → square foot (us survey) (ft² surv)acre (ac) → sabinacre (ac) → square inch (in²)acre (ac) → circular inch (circ in)acre (ac) → acre (us survey) (ac surv)acre (ac) → square rod (rd²)acre (ac) → square rod (us survey) (rd² surv)acre (ac) → square perch (perch²)acre (ac) → square pole (pole²)acre (ac) → square chain (ch²)acre (ac) → roodacre (ac) → township (twp)acre (ac) → homesteadacre (ac) → square mil (mil²)acre (ac) → circular mil (circ mil)acre (ac) → square nautical mile (NM²)acre (ac) → arpentacre (ac) → cuerdaacre (ac) → plazaacre (ac) → varas castellanas cuad (varas cast.)acre (ac) → varas conuqueras cuad (varas con.)acre (ac) → electron cross section (σₑ)