Reference for one unit; displayed values may be rounded.
Acres
Use a dot or comma for decimals, without thousands separators.
Hectares
Display rounding does not improve the accuracy of your original measurement. Very large or very small results use scientific notation.
Method and sourceChoose an example to fill the tool. Results use the displayed formula and are rounded for display.
NIST SP 811 — international foot / SI unitsac → ha — Worked examples
Choose an example to fill the tool. Results use the displayed formula and are rounded for display.
acre to ha Conversion Formula
To convert acres to hectares, multiply the value by 0.404686. One acre spans 4,046.86 sq m while one hectare is 10,000 sq m, so it takes about 2.47 acres to fill a hectare.
Acres and Hectares Explained
Acres (ac)
An acre (ac) is a traditional land unit equal to 4,046.86 square meters — historically the strip one furlong long by one chain wide, or 43,560 sq ft. It is the everyday measure of farms, ranches, and rural lots across the Anglo-American world: a suburban house lot is about a quarter acre, a football field with end zones is 1.32 acres, and a full survey section is 640 acres.
Where it is used: Acres govern real-estate listings, USDA statistics, and land-title documents in the United States, and remain familiar in the UK for estates and farmland.
Origin: The acre derives from Old English æcer, meaning open field, and represented a day's plowing with a medieval ox team; it was standardized as 4,840 sq yd and later metricated as 4,046.86 sq m.
Hectares (ha)
A hectare (ha) is the metric land unit equal to 10,000 square meters — a square 100 meters on each side, or 2.471052 acres. It is the global currency of agriculture and forestry: family farms run tens of hectares, EU subsidy paperwork counts them, and a 100 ha property is a substantial commercial operation.
Where it is used: Hectares are standard for farmland, plantations, and official land statistics in Europe, Latin America, Africa, Australia, and UN/FAO reporting.
Origin: Introduced with the French metric system from the Greek hekaton (hundred), the hectare legalizes 100 ares and was confirmed by international metric conventions in the 19th century.
Acres to Hectares Conversion Table
Select a value to use it in the calculator.
| Acres (ac) | Hectares (ha) |
|---|---|
| 0.0404685642 ha | |
| 0.1011714106 ha | |
| 0.2023428211 ha | |
| 0.4046856422 ha | |
| 0.8093712845 ha | |
| 1.2140569267 ha | |
| 2.0234282112 ha | |
| 3.0351423168 ha | |
| 4.0468564224 ha | |
| 6.0702846336 ha | |
| 8.0937128448 ha | |
| 10.117141056 ha | |
| 16.1874256896 ha | |
| 20.234282112 ha | |
| 30.351423168 ha | |
| 40.468564224 ha | |
| 64.7497027584 ha | |
| 80.937128448 ha | |
| 129.4994055168 ha | |
| 258.9988110336 ha |
Hectares to Acres Conversion Table
| Hectares (ha) | Acres (ac) |
|---|---|
| 0.1 ha | 0.2471053815 ac |
| 0.25 ha | 0.6177634537 ac |
| 0.5 ha | 1.2355269073 ac |
| 1 ha | 2.4710538147 ac |
| 2 ha | 4.9421076293 ac |
| 5 ha | 12.3552690734 ac |
| 10 ha | 24.7105381467 ac |
| 20 ha | 49.4210762934 ac |
| 25 ha | 61.7763453668 ac |
| 50 ha | 123.5526907336 ac |
| 100 ha | 247.1053814672 ac |
| 200 ha | 494.2107629343 ac |
Acres to Hectares in Everyday Objects
Common real-world examples that make Acres and Hectares easy to picture at a glance.
| Acres (ac) | Hectares (ha) | |
|---|---|---|
| An American football field | 1.32 ac | 0.5341850478 ha |
| A FIFA soccer pitch | 1.58 ac | 0.6394033147 ha |
| A US suburban residential lot | 0.25 ac | 0.1011714106 ha |
| A survey section of farmland | 640 ac | 258.9988110336 ha |
| A Major League Baseball field | 4.5 ac | 1.8210853901 ha |
| Hyde Park in London | 350.8896416834 ac | 142 ha |
| Central Park in New York | 842.629350803 ac | 341 ha |
When You Need Acres to Hectares Conversions
International Farmland Deals
A 250-acre Iowa tract converts to 101.17 ha for the European investment committee, whose portfolio benchmarks — price per hectare, yield per hectare — all run metric.
Commodity Yield Benchmarking
USDA county averages arrive in bushels per acre while FAO comparisons need hectares. Converting a 5-acre test plot to 2.023 ha lets both datasets describe the same ground.
Ranch and Grazing Plans
Western ranch budgets quote carrying capacity per section — 640 acres = 259 ha — so Australian consultants can apply their hectares-per-animal rules directly.
Vineyard and Orchard Planting
A 12-acre vineyard converts to 4.86 ha before ordering stock, because European nurseries sell vines by the hectare at densities like 4,000 plants per ha.
Related Area Conversions
How to Use
-
1
Enter Your Land in Acres
Type the acreage from the deed or listing — for example, 40 acres, the classic quarter-quarter section of US farmland
-
2
See the Hectare Equivalent
The result appears instantly: 40 acres = 16.19 ha, the figure international buyers and agronomists expect
-
3
Copy or Reverse
Copy the result into your offer sheet, or click Swap to translate a hectare quote back into acres
-
4
Check the Table
Browse the table for benchmarks like 5 acres = 2.023 ha and 100 acres = 40.47 ha while comparing parcels
Why Use Be Converter?
Instant Conversion
Get precise acre to hectare results in real time as you type — ideal for fast-moving land auctions and tender deadlines
Precision Guaranteed
Uses the exact factor of 0.404686 ha per acre, based on the acre's 4,046.86 sq m definition in this tool's data
Handy Reference Table
Common parcel sizes at a glance — from 1 ac (0.404686 ha) to a full 640 ac section (259 ha) — no spreadsheet needed
Swap with One Click
Toggle back to hectares to acres instantly when the broker's flyer and the government registry use different systems
Free & Unlimited
No registration required. Convert every parcel in the county, as often as your diligence requires — always free
Completely Private
All calculations run locally in your browser. Your land-negotiation numbers never leave your device
Frequently Asked Questions
How many hectares are in 1 acre?
How do I convert 10 acres to hectares?
What is 100 acres in hectares?
Why does the US use acres while Europe uses hectares?
Is an acre bigger than a hectare?
How many hectares is a 160-acre quarter section?
How many hectares is 5 acres?
How do I convert a price per acre to price per hectare?
About Acres to Hectares Converter
Our free online acres to hectares converter handles land measurement for farms, ranches, vineyards, and timberland. The acre remains the working unit of US, UK, and former-Empire land markets, while the hectare governs agriculture in Europe, Latin America, Oceania, and international statistics from the FAO. Whether you are evaluating a Midwest quarter section, a Scottish croft, or an Australian station, this tool applies the exact factor of 0.404686 hectares per acre every time.
Expert Tips for acre to ha Conversion
Anchor on the section: 640 acres = 259 ha exactly with this factor. Halving repeatedly gives 320 ac = 129.5 ha and 160 ac = 64.75 ha — the parcels surveyors quote.
USDA reports yields in bushels per acre while FAO tables use tonnes per hectare; convert your acreage first (multiply by 0.404686), then scale the yield to match.
Stocking rates travel the same way: one cow per 2 acres equals one per 0.81 ha (2 × 0.404686), a useful equivalence when reading Australian pasture guides.
For vineyard planning, convert before ordering vines: a 5-acre site is 2.023 ha, and European nurseries quote plants per hectare.
Mental shortcut: divide acres by 2.5 for a rough hectare figure — 100 ac gives 40 ha against the exact 40.47, close enough for field estimation.
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