Length · Unit Converter

Convert Are to Acre

Convert ares to acres instantly. 1 are = 0.0247105381 acre — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Acre to Are converter for the reverse conversion.

Written by Sunith Babu L, Ph.D., Lead Engineer Reviewed by Girish V Kulkarni Ph.D.
Length category 2 min read Published Last reviewed Updated

Units explained

Metric / SI

Are

What is a are?

An are is a metric unit of area equal to 100 square meters. It is used in some European countries for land measurement, especially for smaller plots like vineyards and gardens.

Origin of the are

Introduced as part of the French metric system in 1795. The name comes from the Latin 'area' meaning surface or open ground.

Where it is used

Ares are still used in some European countries (especially Switzerland and France) for small-plot land measurement. In Switzerland, an are is a common unit for vineyard size. Most modern contexts prefer square meters or hectares.

When and where it was developed

Defined in 1795 in France as part of the original metric system.

Imperial / US Customary

Acre

What is a acre?

An acre is an imperial unit of area equal to exactly 4046.8564224 m². It is the most widely used non-metric unit for land area, particularly in the US, UK, and India.

Origin of the acre

Originally defined in medieval England as the area one yoke of oxen could plow in a day, approximately 40 perches by 4 perches. Standardized via the 1959 International Yard and Pound Agreement.

Where it is used

Acres are the standard land measurement unit in the US (real estate, agriculture), the UK (rural property), and widely used in India (alongside hectares and traditional regional units). 1 acre = 4840 sq yd = 43,560 sq ft = 0.4047 hectare.

When and where it was developed

Medieval English farming origin; modern exact value standardized in 1959.

Are to Acre conversion formula

The relationship between ares and acres:

1 a = 0.0247105381 ac
1 ac = 40.468564224 a

To convert ares to acres, multiply the value in ares by 0.0247105381. To reverse, multiply acres by 40.468564224.

How to use this converter

Type a value into the calculator. The result in acres updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Acre to Are converter for the reverse direction.

Step-by-step: convert ares to acres

  1. Write down the value in ares (a).
  2. Multiply that value by the factor 0.0247105381.
  3. The product is the equivalent value in acres (ac).
  4. To reverse, multiply the acre value by 40.468564224.

Worked examples

Example 1 — Convert 1 a to ac:
1 × 0.0247105381 = 0.0247105381 ac

Example 2 — Convert 100 a to ac:
100 × 0.0247105381 = 2.4710538147 ac

Are to Acre conversion table

Standard reference values for converting ares to acres:

Are [a]Acre [ac]
0.010.0002471054
0.10.0024710538
10.0247105381
20.0494210763
30.0741316144
40.0988421526
50.1235526907
100.2471053815
200.4942107629
300.7413161444
400.9884215259
501.2355269073
1002.4710538147
50012.3552690734
100024.7105381467

Frequently asked questions

How many acres is 1 are?
1 are equals 0.0247105381 acre.
How do I convert ares to acres?
Multiply the value in ares by 0.0247105381 to get acres.
How do I convert acres back to ares?
Multiply the value in acres by 40.468564224, or use the Acre to Are converter.
How many acres is 100 ares?
100 ares equals 2.4710538147 acres, because 100 × 0.0247105381 = 2.4710538147.

Convert Are to other area units

Show all Are conversions
Metric / SI (15 units)
Are to Square Yoctometer (ym²) Are to Square Zeptometer (zm²) Are to Square Attometer (am²) Are to Square Femtometer (fm²) Are to Square Picometer (pm²) Are to Square Nanometer (nm²) Are to Square Micrometer (µm²) Are to Square Millimeter (mm²) Are to Square Centimeter (cm²) Are to Square Decimeter (dm²) Are to Square Meter (m²) Are to Square Dekameter (dam²) Are to Square Hectometer (hm²) Are to Hectare (ha) Are to Square Kilometer (km²)
Imperial / US Customary (3 units)
Are to Square Inch (in²) Are to Square Foot (ft²) Are to Acre (ac)

Sources & references

Conversion factor (1 a = 0.0247105381 ac) verified against the following authoritative sources:

Results are provided for general reference. Verify critical measurements against an authoritative standard.