Acres to Hectares Converter for Australian Farms & Lifestyle Blocks

Convert ac to ha as you type.

Land & Area Unit Converter - Metric & Imperial

1 ac ≈ 0.4046856422 ha

Reference for one unit; displayed values may be rounded.

Enter Acres

Acres

Use a dot or comma for decimals, without thousands separators.

Result in Hectares

Hectares

Decimal places

Display rounding does not improve the accuracy of your original measurement. Very large or very small results use scientific notation.

Method and source

Choose an example to fill the tool. Results use the displayed formula and are rounded for display.

NIST SP 811 — international foot / SI units

ac → 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 4,046.86 square metres while one hectare is 10,000 square metres, so it takes about 2.47 acres to fill a hectare.

1 ac ≈ 0.4046856422 ha

Acres and Hectares Explained

Acres (ac)

An acre (ac) is a traditional land unit equal to 4,046.86 square metres — historically the strip one furlong long by one chain wide, or 43,560 square feet. It is the traditional measure of Australian farmland and the famous quarter-acre suburban block: an AFL oval covers roughly 2 hectares (about 5 acres), hobby farms are often quoted from 5 acres up, and outback stations were once measured in hundreds of thousands of acres.

Where it is used: Acres still turn up in Australian rural listings, agistment rates and older title documents, even though every official record now uses hectares.

Origin: The acre derives from Old English æcer, meaning open field, and represented a day's plowing with a medieval ox team; it was standardised at 4,840 sq yd and later metricated at 4,046.86 sq m — the changeover Australia completed when it went metric in the 1970s.

Hectares (ha)

A hectare (ha) is the metric land unit equal to 10,000 square metres — a square 100 metres on each side, or 2.471052 acres. It is the working unit of Australian agriculture: crop and pasture statistics, water entitlements and rural valuations all count hectares, from 10 ha Yarra Valley vineyards to Top End stations running into the hundreds of thousands of hectares.

Where it is used: Hectares are standard for farmland, plantations and official land statistics across Australia, Europe, Latin America, Africa and UN/FAO reporting.

Origin: Introduced with the French metric system from the Greek hekaton (hundred), the hectare legalises 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 AFL oval	1.32 ac	0.5341850478 ha
A soccer pitch	1.58 ac	0.6394033147 ha
The classic quarter-acre suburban block	0.25 ac	0.1011714106 ha
A grazing paddock on a sheep station	640 ac	258.9988110336 ha
A cricket oval, like Adelaide Oval	4.5 ac	1.8210853901 ha
Hyde Park in Sydney	350.8896416834 ac	142 ha
Kings Park in Perth	842.629350803 ac	341 ha

When You Need Acres to Hectares Conversions

Overseas Interest in Rural Property

A 250-acre grazing property in the Riverina converts to 101.17 ha for the overseas buyer's investment committee, whose portfolio benchmarks — price per hectare, yield per hectare — all run metric.

Commodity Yield Benchmarking

ABARES grain figures come in tonnes per hectare while US sources use bushels per acre. Converting a 5-acre trial strip to 2.023 ha lets both datasets describe the same paddock.

Station and Grazing Plans

District stocking guides quote carrying capacity in DSE per hectare, so converting a 640-acre run (259 ha) lets you apply those rules-of-thumb directly to your country.

Vineyard and Orchard Planting

A 12-acre vineyard in the Barossa converts to 4.86 ha before ordering vines, because nurseries sell planting stock by the hectare at densities around 4,000 vines per ha.

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How to Use

1

Enter Your Land in Acres

Type the acreage from the listing or title documents — for example, 40 acres, a classic hobby-farm size in the ranges around Goulburn and Ballarat
2

See the Hectare Equivalent

The result appears instantly: 40 acres = 16.19 ha — the figure overseas buyers, agronomists and your lender all expect
3

Copy or Reverse

Copy the result into your contract notes, 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 listings online

Why Use Be Converter?

Instant Conversion

Get precise acre to hectare results in real time as you type — ideal for clearing sales, agent inspections and tender deadlines

Precision Guaranteed

Uses the exact factor of 0.404686 ha per acre, based on the acre's 4,046.86 square-metre definition — the same figure your valuer and the banks use

Handy Reference Table

Common rural block sizes at a glance — from a 1 ac allotment (0.404686 ha) to a 640 ac grazing run (259 ha) — no spreadsheet needed

Swap with One Click

Toggle back to hectares-to-acres instantly when the agent's flyer quotes acres but the title search and your lender work in hectares

Free & Unlimited

No registration required. Convert every paddock in the shire, as often as your due diligence requires — always free

Completely Private

All calculations run locally in your browser. Your land-deal numbers never leave your device

Frequently Asked Questions

How many hectares are in 1 acre?

1 acre equals 0.404686 hectares, usually rounded to 0.40 ha. Ten acres therefore make almost exactly 4.047 ha.

How do I convert 10 acres to hectares?

Multiply 10 by 0.404686, giving 4.04686 ha. An 11-acre paddock, for comparison, is about 4.45 ha.

What is 100 acres in hectares?

100 acres equals 40.47 hectares (100 × 0.404686 = 40.4686). That is genuine hobby-to-small-commercial scale in Australia — room for a few hundred sheep on good country, or a modest vineyard plus grazing.

Why do Australian listings still use acres if we went metric?

Australia switched to metric measurement in the 1970s and every official record now uses hectares, but acres survive in rural tradition. Old titles described properties in acres, and agents often quote both — '16 ha (40 acres)' — because many buyers still think in acres. Land data from the US and UK also arrives in acres, so conversions remain part of everyday rural life.

Is an acre bigger than a hectare?

No. A hectare is larger: 1 ha = 2.471052 acres. An acre covers only about 40% of a hectare — roughly a fifth of an AFL oval, which runs to about 2 hectares.

How big is the classic quarter-acre block in hectares?

A quarter acre equals 0.101 hectares (0.25 × 0.404686), or about 1,012 square metres. The quarter-acre block was the heart of the Australian Dream, though most new suburban lots these days are smaller — often 400 to 600 square metres.

How many hectares is 5 acres?

5 acres equals 2.023 hectares (5 × 0.404686 = 2.02343). That is a common lifestyle-block size for a hobby orchard, a horse paddock or a few head of cattle.

How do I convert a price per acre to price per hectare?

Multiply by 2.471052, since one hectare contains that many acres. Grazing country advertised at $8,000 per acre works out at roughly $19,768 per hectare — the comparison valuers and banks actually use.

About Our Acres to Hectares Converter

Our free online acres to hectares converter handles land measurement for hobby farms, grazing properties, vineyards and cropping country. Australia went metric decades ago, yet acres remain everywhere — in pre-1970s titles, agent listings ('10 acres with town water') and conversation around the saleyards — while the hectare is what the banks, valuers and government agencies work in. Whether you are pricing a lifestyle block in the Hunter, a wheat property on the Eyre Peninsula or a cattle station in the Top End, this tool applies the exact factor of 0.404686 hectares per acre every time.

Expert Tips for Acre to Hectare Conversion

Anchor on the classic 100-acre block: 100 ac = 40.47 ha with this factor. Halving gives 50 ac = 20.23 ha and 25 ac = 10.12 ha — the sizes agents quote for hobby farms around regional centres.

ABARES and ABS report crop yields in tonnes per hectare, while older US sources use bushels per acre; 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) — handy when agistment guides quote DSE (dry sheep equivalents) per hectare.

For vineyard planning in the Barossa or Yarra, convert before ordering vines: a 5-acre site is 2.023 ha, and nurseries quote planting densities per hectare — commonly around 4,000 vines per ha.

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 paddock estimation.

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