Convert Acre to Hectare
1 acre = 0.4046856 hectare (ha). For example, 10 acre = 4.046856 hectare and 100 acre = 40.46856 hectare. Type any value below to convert acre to hectare both ways — it runs entirely in your browser.
Quick answer: Acre to Hectare
1 Acre = 0.4046856 Hectare (ac → ha). To convert acre to hectare, multiply by 0.4046856. To convert hectare to acre, multiply by 2.471054. The converter at the top does this instantly and both ways; the sections below give the formula, worked examples, a full conversion chart and answers to the most common acre-to-hectare questions.
How to convert Acre to Hectare
To convert acre to hectare, multiply the number of acre by the conversion factor 0.4046856, because 1 ac = 0.4046856 ha. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 ha = 2.471054 ac, so you divide by 0.4046856 (or multiply by 2.471054) to turn hectare back into acre.
ha = ac × 0.4046856 ·
ac = ha × 2.471054
- Write down the value you want to convert, in acre.
- Multiply it by 0.4046856.
- The result is the same area/length/quantity expressed in hectare.
Acre to Hectare — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 acre is 2.023428 hectare because 5 ac × 0.4046856 = 2.023428 ha.
| Acre | Calculation | Hectare |
|---|---|---|
| 1 ac | 1 ac × 0.4046856 = 0.4046856 ha | 0.4046856 ha |
| 2 ac | 2 ac × 0.4046856 = 0.8093713 ha | 0.8093713 ha |
| 3 ac | 3 ac × 0.4046856 = 1.214057 ha | 1.214057 ha |
| 5 ac | 5 ac × 0.4046856 = 2.023428 ha | 2.023428 ha |
| 7 ac | 7 ac × 0.4046856 = 2.832799 ha | 2.832799 ha |
| 10 ac | 10 ac × 0.4046856 = 4.046856 ha | 4.046856 ha |
| 12 ac | 12 ac × 0.4046856 = 4.856228 ha | 4.856228 ha |
| 15 ac | 15 ac × 0.4046856 = 6.070285 ha | 6.070285 ha |
| 20 ac | 20 ac × 0.4046856 = 8.093713 ha | 8.093713 ha |
| 25 ac | 25 ac × 0.4046856 = 10.11714 ha | 10.11714 ha |
| 50 ac | 50 ac × 0.4046856 = 20.23428 ha | 20.23428 ha |
| 100 ac | 100 ac × 0.4046856 = 40.46856 ha | 40.46856 ha |
Common Acre to Hectare conversions
These are the acre-to-hectare values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 acre = 0.4046856 hectare
- 2 acre = 0.8093713 hectare
- 2.5 acre = 1.011714 hectare
- 3 acre = 1.214057 hectare
- 4 acre = 1.618743 hectare
- 5 acre = 2.023428 hectare
- 6 acre = 2.428114 hectare
- 7 acre = 2.832799 hectare
- 8 acre = 3.237485 hectare
- 9 acre = 3.642171 hectare
- 10 acre = 4.046856 hectare
- 12 acre = 4.856228 hectare
- 15 acre = 6.070285 hectare
- 20 acre = 8.093713 hectare
- 25 acre = 10.11714 hectare
- 30 acre = 12.14057 hectare
- 50 acre = 20.23428 hectare
- 75 acre = 30.35142 hectare
- 100 acre = 40.46856 hectare
- 200 acre = 80.93713 hectare
- 500 acre = 202.3428 hectare
- 1000 acre = 404.6856 hectare
Acre to Hectare conversion chart (both directions)
The chart below converts acre to hectare and hectare to acre side by side, so it works whichever way you need. 1 acre = 0.4046856 hectare, and 1 hectare = 2.471054 acre.
| Acre → Hectare | Hectare → Acre |
|---|---|
| 0.25 ac = 0.1011714 ha | 0.25 ha = 0.6177635 ac |
| 0.5 ac = 0.2023428 ha | 0.5 ha = 1.235527 ac |
| 1 ac = 0.4046856 ha | 1 ha = 2.471054 ac |
| 2 ac = 0.8093713 ha | 2 ha = 4.942108 ac |
| 3 ac = 1.214057 ha | 3 ha = 7.413161 ac |
| 4 ac = 1.618743 ha | 4 ha = 9.884215 ac |
| 5 ac = 2.023428 ha | 5 ha = 12.35527 ac |
| 6 ac = 2.428114 ha | 6 ha = 14.82632 ac |
| 7 ac = 2.832799 ha | 7 ha = 17.29738 ac |
| 8 ac = 3.237485 ha | 8 ha = 19.76843 ac |
| 9 ac = 3.642171 ha | 9 ha = 22.23948 ac |
| 10 ac = 4.046856 ha | 10 ha = 24.71054 ac |
| 12 ac = 4.856228 ha | 12 ha = 29.65265 ac |
| 15 ac = 6.070285 ha | 15 ha = 37.06581 ac |
| 20 ac = 8.093713 ha | 20 ha = 49.42108 ac |
| 25 ac = 10.11714 ha | 25 ha = 61.77635 ac |
| 30 ac = 12.14057 ha | 30 ha = 74.13161 ac |
| 40 ac = 16.18743 ha | 40 ha = 98.84215 ac |
| 50 ac = 20.23428 ha | 50 ha = 123.5527 ac |
| 75 ac = 30.35142 ha | 75 ha = 185.329 ac |
| 100 ac = 40.46856 ha | 100 ha = 247.1054 ac |
| 150 ac = 60.70285 ha | 150 ha = 370.6581 ac |
| 200 ac = 80.93713 ha | 200 ha = 494.2108 ac |
| 250 ac = 101.1714 ha | 250 ha = 617.7635 ac |
| 500 ac = 202.3428 ha | 500 ha = 1,235.527 ac |
| 1000 ac = 404.6856 ha | 1000 ha = 2,471.054 ac |
Acre vs Hectare: which is bigger?
A hectare is the larger unit: one hectare equals 2.471054 acres. Put another way, you need 2.471054 acres to make a single hectare.
What is a Acre? History, origin and usage
The acre is one of the oldest English land measures, its name coming through Norman French from a Germanic root meaning 'cultivated field' (compare German Acker and Latin ager). Historically it was the area a team of eight oxen could plough in a single day, formalised as one chain by one furlong (66 by 660 feet).
It remains a statutory land unit in the United States and across many Commonwealth countries, and in India it is one of the main units for agricultural land alongside the bigha and hectare. It is used for farms, estates and large plots worldwide.
One acre is 4,840 square yards or 43,560 square feet, about 0.405 hectare, and is roughly nine-tenths the size of an American football field. The furlong in its definition literally means a 'furrow long', the distance oxen ploughed before resting.
What is a Hectare? History, origin and usage
The hectare belongs to the metric system created during the French Revolution; the law of 18 Germinal, Year III (1795) defined the are as 100 square metres for measuring land. The hectare is 100 ares, its name combining the Greek hecto- (hundred) with the are.
It is the legal unit for land area across the European Union, Australia, New Zealand, Canada and much of the world, used in agriculture, forestry, planning and land management. In India it appears in official agricultural statistics and land records alongside the acre.
One hectare is 10,000 square metres, about 2.47 acres, and 100 hectares make one square kilometre. It is close in size to an international rugby pitch, which makes it a handy mental yardstick.
Convert 1 Acre to other units
It can help to see a acre next to the other units it is commonly compared with. One acre (ac) is equal to:
| 1 Acre equals | Unit |
|---|---|
| 4,840 gaj | Gaj |
| 160 marla | Marla |
| 8 kanal | Kanal |
| 1 killa | Killa |
| 0.04 murabba | Murabba |
| 100 decimal | Decimal |
| 100 cent | Cent |
| 40 guntha | Guntha |
| 0.4046856 ha | Hectare |
| 43,560 ft² | Square Foot |
| 4,840 yd² | Square Yard |
| 4,046.856 m² | Square Metre |
| 40,468,560 cm² | Square Centimetre |
| 4,046,856,000 mm² | Square Millimetre |
| 6,272,640 in² | Square Inch |
| 0.004046856 km² | Square Kilometre |
| 40.46856 are | Are |
| 4.046856 daa | Decare |
| 0.0015625 mi² | Square Mile |
| 1 ac | Acre |
| 4,840 yd² | Square Yard |
| 43,560 ft² | Square Foot |
| 0.4046856 ha | Hectare |
| 1,440 karam² | Square Karam |
| 18.15 ground | Ground |
| 302.5 lessa | Lessa |
| 968 chatak | Chatak |
| 0.75625 pura | Pura |
Convert 1 Hectare to other units
One hectare (ha) is equal to:
| 1 Hectare equals | Unit |
|---|---|
| 11,959.9 gaj | Gaj |
| 395.3686 marla | Marla |
| 19.76843 kanal | Kanal |
| 2.471054 killa | Killa |
| 0.09884215 murabba | Murabba |
| 247.1054 decimal | Decimal |
| 247.1054 cent | Cent |
| 98.84215 guntha | Guntha |
| 2.471054 ac | Acre |
| 107,639.1 ft² | Square Foot |
| 11,959.9 yd² | Square Yard |
| 10,000 m² | Square Metre |
| 100,000,000 cm² | Square Centimetre |
| 10,000,000,000 mm² | Square Millimetre |
| 15,500,030 in² | Square Inch |
| 0.01 km² | Square Kilometre |
| 100 are | Are |
| 10 daa | Decare |
| 0.003861022 mi² | Square Mile |
| 2.471054 ac | Acre |
| 11,959.9 yd² | Square Yard |
| 107,639.1 ft² | Square Foot |
| 1 ha | Hectare |
| 3,558.317 karam² | Square Karam |
| 44.84963 ground | Ground |
| 747.4938 lessa | Lessa |
| 2,391.98 chatak | Chatak |
| 1.868734 pura | Pura |
Tips for converting Acre to Hectare
- To go from acre to hectare, multiply by 0.4046856; to go back, divide by 0.4046856 (or multiply by 2.471054).
- For a quick mental estimate, remember that 1 acre ≈ 0.4046856 hectare, so 10 acre ≈ 4.046856 hectare.
- The converter above keeps full precision; the tables round for readability, so use the tool for exact figures.
- Both fields update live as you type — change either side to convert in that direction.
How to use this Acre to Hectare converter
Type a number into the Acre field and the equivalent in Hectare appears instantly — there is no “convert” button to press and nothing is sent to a server, so it works offline once the page has loaded and is safe for any data. You can also type into the Hectare field to convert the other way (hectare to acre). Use the swap control to flip the two units, and copy the result with a single click. Because the calculation runs in your browser with full floating-point precision, the converter is more exact than the rounded figures shown in the reference chart above — use the chart for quick look-ups and the tool for precise work.
Accuracy and method
Every figure on this page — the formula, the worked examples, the conversion chart and the “convert to other units” tables — is computed from a single verified conversion factor (1 ac = 0.4046856 ha), never copied from a hand-typed lookup table that could drift. That factor is derived from each unit’s definition in terms of a common base unit, and an automated check re-verifies all of the site’s factors on every update, so the numbers here stay correct over time. This matters for acre-to-hectare conversions because a small rounding error in a published table compounds quickly at larger quantities; computing from the exact factor avoids that.
Sources
- NIST Special Publication 811 — Guide for the Use of the SI — publishes the exact metric equivalents of the customary units. The inch, foot, yard and mile are defined exactly in metres by the 1959 international yard-and-pound agreement, so every imperial figure on this page is exact, not rounded.
- BIPM — The International System of Units (SI Brochure) — the defining document for the SI, published by the International Bureau of Weights and Measures. It fixes the base unit that this conversion resolves to, which is why the factor here can be exact rather than approximate.
Indian land units can vary by state and local custom. This converter uses the most widely accepted standard value; always confirm against your local revenue records (patwari / tehsil) for legal transactions.
Frequently asked questions
- How many hectare are in 1 acre?
- 1 acre = 0.4046856 hectare (ha). To convert any number of acre to hectare, multiply by 0.4046856.
- How do I convert acre to hectare?
- Multiply the number of acre by 0.4046856. For example, 10 acre = 10 × 0.4046856 = 4.046856 hectare, and 25 acre = 10.11714 hectare.
- How many acre are in 1 hectare?
- 1 hectare = 2.471054 acre. So to convert hectare back to acre, multiply by 2.471054.
- What is the formula to convert acre to hectare?
- hectare = acre × 0.4046856. The reverse formula is acre = hectare × 2.471054.
- How much is 100 acre in hectare?
- 100 acre = 40.46856 hectare. (And 1000 acre = 404.6856 hectare.)
- Which is bigger, a acre or a hectare?
- A hectare is larger: 1 hectare = 2.471054 acre.
- Is this acre to hectare converter accurate?
- Yes — every value is computed from the exact 0.4046856 ha per ac factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert hectare to acre too?
- Yes. The converter works both ways — enter a value in either field. 1 hectare = 2.471054 acre.