Acres to Hectares Calculator for US Farmland & Ranches
Convert ac to ha as you type.
Area Conversion CalculatorReference 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 Hectare Conversion Formula
To convert acres to hectares, multiply the value by 0.404686. One acre covers 43,560 square feet (4,046.86 square meters), while one hectare spans 107,639 square feet (10,000 square meters) — 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 43,560 square feet (about 4,046.86 square meters) — historically the strip one furlong long by one chain wide. It's the everyday measure of American land: a suburban lot runs about a quarter acre, an NFL football field including end zones covers 1.32 acres, and a full survey section is 640 acres.
Where it is used: Acres rule American real-estate listings, USDA farm statistics, county tax rolls, and land-title documents from Texas ranches to Iowa row-crop country.
Origin: The acre derives from Old English æcer, meaning open field — the amount a medieval ox team could plow in a day. It was standardized at 4,840 square yards and later set at exactly 4,046.86 square meters.
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's the global currency of agriculture and forestry: family farms in Europe run tens of hectares, farm-subsidy paperwork counts them, and a 100 ha property is a serious 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 equals 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-regulation soccer field | 1.58 ac | 0.6394033147 ha |
| A US suburban residential lot | 0.25 ac | 0.1011714106 ha |
| A full survey section of Midwest farmland | 640 ac | 258.9988110336 ha |
| A Major League Baseball field | 4.5 ac | 1.8210853901 ha |
| Golden Gate Park in San Francisco | 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 corn and soybean tract in Iowa converts to 101.17 ha for the overseas 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
Montana and Wyoming ranch budgets quote carrying capacity per section — 640 acres = 259 ha — so metric-minded consultants can apply their hectares-per-animal rules directly.
Vineyard and Orchard Planting
A 12-acre vineyard in Napa or Walla Walla converts to 4.86 ha before ordering stock, since 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 straight off the deed or MLS listing — say, 40 acres, the classic quarter-quarter section of Midwest farmland
-
2
See the Hectare Equivalent
The answer appears instantly: 40 acres = 16.19 ha, exactly what overseas buyers and extension agronomists ask for
-
3
Copy or Reverse
Paste the result into your purchase offer, or hit Swap to turn a hectare-based quote back into acres
-
4
Check the Table
Scan the table for benchmarks like 5 acres = 2.023 ha and 100 acres = 40.47 ha while comparing listings in Iowa or Texas
Why Use Be Converter?
Instant Conversion
Get precise acre-to-hectare results in real time as you type — built for fast-moving county land auctions and tight closing deadlines
Precision Guaranteed
Runs on the exact factor of 0.404686 ha per acre, straight from the acre's official 43,560-square-foot definition — the same math your county assessor uses
Handy Reference Table
Common parcel sizes at a glance — from 1 acre (0.404686 ha) to a full 640-acre survey section (259 ha) — no spreadsheet needed
Swap with One Click
Toggle back to hectares-to-acres instantly when the county recorder lists acres but the overseas investor quotes hectares
Free & Unlimited
No sign-up, no credit card. Convert every section in the county as many times as your due diligence requires — always free
Completely Private
All calculations run locally in your browser. Your land-deal numbers never leave your phone or laptop
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 the Acres to Hectares Calculator
Our free online acres-to-hectares converter handles land measurement for American farms, ranches, vineyards, and timberland. The acre is the everyday unit in US land offices, USDA reports, and county courthouses, while the hectare governs agriculture across Europe, Latin America, Oceania, and FAO statistics. Whether you're pricing a quarter section in Nebraska, marketing a Napa Valley vineyard, or fielding questions from an overseas buyer, this tool applies the exact factor of 0.404686 hectares per acre every time.
Expert Tips for Converting Acres to Hectares
Think in sections: 640 acres = 259 ha exactly. Halve it and you get 320 acres = 129.5 ha, then 160 acres = 64.75 ha — the parcels every surveyor and county assessor quotes.
USDA yields come in bushels per acre while FAO tables use metric tons per hectare; convert your acreage first (multiply by 0.404686), then rescale the yield to match.
Stocking rates convert the same way: one cow-calf pair per 2 acres equals one per 0.81 ha (2 × 0.404686), a handy figure when a foreign buyer or grazing consultant works in metric.
For vineyard or orchard planning, convert before you order: a 5-acre site in Oregon's Willamette Valley is 2.023 ha, and European nurseries price vines per hectare.
Mental shortcut: divide acres by 2.5 for a quick ballpark — 100 acres gives 40 ha against the exact 40.47, close enough for a walk-the-field estimate.
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