Acres to Hectares Converter: Formula, Examples & Chart

Converting acres to hectares is simple: 1 acre equals 0.40468564224 hectares. To convert any area from acres into hectares, multiply the number of acres by 0.40468564224.

For example, 10 acres = 4.0468564224 hectares.

Quick conversion:

• 1 acre = 0.40468564224 ha
• 5 acres = 2.0234282112 ha
• 10 acres = 4.0468564224 ha
• 50 acres = 20.234282112 ha
• 100 acres = 40.468564224 ha

If you need a quick result, use the calculator below. For the formula, worked examples, practical uses, and a conversion chart, continue reading.

Convert Acres to Hectares Instantly

Need the answer right away? Enter your land area in acres into the calculator below and get the equivalent value in hectares instantly. The calculator uses the precise conversion factor of 1 acre = 0.40468564224 hectares, making it useful for property, agriculture, land planning, mapping, and everyday area conversions.

Simply enter the number of acres and select Convert — no manual calculation required.

Convert Acres to Hectares

acres Convert acres to hectares

ha

How to Convert Acres to Hectares

The standard acres to hectares formula is:

Hectares = Acres × 0.40468564224

This means that every acre contains approximately 0.404686 hectares.

For a quick estimate, you can multiply the number of acres by 0.405. However, when accuracy matters—for example in land records, agricultural calculations, mapping, or professional documents—it is better to use the full conversion factor or the calculator above.

Example: Convert 5 Acres to Hectares

Use the formula:

5 × 0.40468564224 = 2.0234282112

Therefore:

5 acres = 2.0234282112 hectares

Rounded to two decimal places:

5 acres ≈ 2.02 hectares

Example: Convert 25 Acres to Hectares

25 × 0.40468564224 = 10.117141056

Therefore:

25 acres = 10.117141056 hectares

Rounded to two decimal places:

25 acres ≈ 10.12 hectares

Example: Convert 100 Acres to Hectares

100 × 0.40468564224 = 40.468564224

Therefore:

100 acres = 40.468564224 hectares

Conversion Standard Used on This Page

The conversion can also be verified through square meters:

1 acre = 4,046.8564224 square meters

A hectare is defined as:

1 hectare = 10,000 square meters

Therefore:

4,046.8564224 ÷ 10,000 = 0.40468564224 hectares

So the conversion used throughout this page is:

1 acre = 0.40468564224 hectares

Using a clearly defined conversion factor helps keep results consistent whether you are comparing a small plot, a farm, a development site, or a much larger land area.

What Is an Acre?

An acre is a unit of area commonly associated with land measurement. It is widely encountered in real estate, farming, forestry, property records, and land descriptions, particularly in countries where imperial or U.S. customary measurements are familiar.

One acre equals:

• 43,560 square feet
• 4,840 square yards
• 4,046.8564224 square meters
• 0.40468564224 hectares

Because acres remain common in property and agricultural contexts, people frequently need to convert them into metric units when comparing land internationally.

What Is a Hectare?

A hectare, abbreviated ha, is a metric unit of area used primarily for measuring land.

One hectare equals:

• 10,000 square meters
• 0.01 square kilometers
• approximately 2.47105 acres

A square measuring 100 meters by 100 meters has an area of exactly one hectare.

Hectares are especially convenient for agriculture, forestry, environmental management, surveying, and large-scale land measurement because they provide a practical unit between square meters and square kilometers.

Acre vs. Hectare: Which Is Larger?

A hectare is larger than an acre.

1 hectare ≈ 2.47105 acres

By comparison:

1 acre ≈ 0.404686 hectares

This is useful to remember when estimating a conversion without a calculator. A hectare is roughly two and a half acres, while an acre is a little over 40% of a hectare.

For example, a 20-acre property is not 20 hectares. It is approximately:

20 acres = 8.093713 hectares

Why Is Converting Acres to Hectares Important?

Land measurement systems vary between countries and industries. A property may be advertised in acres while a planning document, agricultural report, mapping system, or international dataset uses hectares.

Accurate conversion makes those measurements directly comparable.

Converting acres to hectares can be important when:

• comparing international property listings;
• reviewing agricultural land sizes;
• calculating farm or field areas;
• preparing land-management documents;
• working with environmental or forestry data;
• comparing property sizes across different measurement systems;
• using maps, GIS data, or surveying information;
• converting historical or local land measurements into metric units.

A small rounding difference may not matter when casually comparing two properties, but greater precision can be useful when working with large areas or professional datasets.

Where Are Acres and Hectares Commonly Used?

Real Estate and Property

Property listings may describe plots, farms, estates, or development land in acres. Buyers or professionals accustomed to the metric system may need the same area in hectares to understand the size more easily.

For example:

12 acres × 0.40468564224 = 4.85622770688 hectares

So a 12-acre property covers approximately 4.86 hectares.

Agriculture

Farmers, agricultural businesses, researchers, and land managers regularly work with land area. Crop yields, field sizes, fertilizer applications, irrigation requirements, and agricultural statistics may be expressed per acre in one source and per hectare in another.

Converting the underlying area accurately makes those datasets easier to compare.

Forestry and Environmental Management

Forests, conservation areas, habitats, wetlands, and restoration projects often cover areas large enough for hectares to be more convenient than square meters.

If an existing document reports an area in acres, converting it to hectares makes it easier to compare with metric environmental data.

Mapping, Surveying and Land Planning

Maps and land records can use different measurement standards depending on their origin. Converting between acres and hectares is therefore useful when combining information from multiple sources or presenting land measurements to an international audience.

When Do You Need an Acres to Hectares Conversion?

You may need an acres to hectares conversion whenever an area expressed in acres must be understood, compared, reported, or calculated in the metric system.

Typical situations include:

• buying or selling land internationally;
• comparing farm sizes;
• reading agricultural studies;
• checking land-development plans;
• converting property specifications;
• preparing environmental reports;
• comparing geographic datasets;
• working with international statistics.

For a single value, the calculator is usually the fastest option. For repeated calculations in a spreadsheet or database, use:

hectares = acres × 0.40468564224

How Accurate Should the Conversion Be?

The amount of rounding you need depends on what the result is being used for.

For casual comparisons, two decimal places are usually sufficient:

10 acres ≈ 4.05 hectares

For more detailed calculations, you might keep four or six decimal places:

10 acres = 4.0469 hectares

or

10 acres = 4.046856 hectares

For technical calculations, retaining the full conversion factor minimizes accumulated rounding errors.

As a good rule, calculate with the most accurate value available and round only the final result.

Acres to Hectares Conversion Chart

The following acres to hectares chart provides common values from 1 to 100 acres. Values are rounded to six decimal places for convenient reference.

Acres	Hectares
1 acre	0.404686 ha
10 acres	4.046856 ha
20 acres	8.093713 ha
30 acres	12.140569 ha
40 acres	16.187426 ha
50 acres	20.234282 ha
60 acres	24.281139 ha
70 acres	28.327995 ha
80 acres	32.374851 ha
90 acres	36.421708 ha
100 acres	40.468564 ha

For a value that is not listed in the chart, enter the number of acres into the calculator at the top of the page.

Frequently Asked Questions