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Acre - Unit of Measurement

Last updated date: 04th Mar 2024
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Acres to Sq. Kilometers

One acre equals 0.00404686 sq. Kilometer, 0.0015625 square mile, 43,560 square feet, 4,047 square metres (0.4047 hectares) or about 4,840 square yards. While all present-time variants of the acre consist of 4,840 square yards, there are also different descriptions of a yard, so the exact size of an acre depends upon a specific yard on which it is based.

Land Measuring Units

The acre is a land measuring unit which is widely used in the US and imperial customary systems. It is traditionally described as the area of one chain by one furlong, which is exactly equivalent to ten square chains, 1/640 of a square mile, or 43,560 sq feet, and roughly 4,047 m2, or approximately 40% of a hectare. Depending upon the International yard and pound agreement of 1959, an acre may be announced as exactly 4,046.8564224 square metres.

Difference Between Acre and Bigha

To understand the difference between bigha and acre, let’s get to first understand these different units of measurement. In real estate, land is measured in different units. Usually, land is measured in acres square kilometers, square yards or square foot or. In India, parcels of land are often measured using the unit of measurement “Bigha”.

Note that the measurement of Bigha is different for different states like Haryana, Uttar Pradesh, Punjab, Rajasthan, Jharkhand, and Gujarat among others. 1 acre equals 4.8 bigha in states like Haryana and Punjab. Or you can also say that 1 bigha equals 0.4 acre approximately.

Conversion of bigha to acre can be easily done by using area converter acre to bigha. This will help to calculate the parcels of land in both these units of measurement.

Bigha to Acre Conversion

Conversion of Bigha to Acre can be done in a simple way. It is used in different measurements in different states of India Including Uttarakhand, Uttar Pradesh, Haryana, Himachal Pradesh, Maharashtra, and Gujarat etc. It is equivalent to 1⁄640 of a square mile, and 43,560 square feet. 1 Bigha roughly equals 0.40052356 acres. You can use an online conversion calculator to convert Bigha to Acres.

Acre, Bigha, & Sq. Kilometer and their Significance in Real Estate

Now that you have learnt sq metres to acres conversion, acre to sq kilometer, decimal to bigha converter, let understand the importance of these units and conversions.

  • As a real estate buyer, you will focus on your need for sufficient space, basic amenities, pricing per acre/bigha/sq.feet, and connectivity before investing.

  • Area covered under budget and you must do a minute field survey in order to know what you are getting into.

  • Acre and Bigha is a decent property expanse for a big house, farm, banquet or similar.

Solved Examples


Convert Km3 to mile3


1km = 0.621 mile

= 0.621 * 0.621 * 0.621

1 km3 = 0.239 mile3

Fun Facts

  • ‘Acre’ is commonly used in different former British Commonwealth countries.

  • Acre continues to be a statute measure, though since 2010 not used in the United Kingdom itself and not since decades ago in New Zealand, Australia and South Africa.

  • Although acre is not a statute measure, it is still legitimate to "use for trade" if provided as supplementary information and is not used for land registration.

  • Traditionally, during the middle ages, acre was perceived as the area of land that could be cultivated in one day by a team of 8 oxen.

  • ‘Acre’ is still a statute measure in the USA.

  • Both the US survey acre and international acre are in use, but they vary by only two parts per million.

  • The most common use of the acre is to measure tracts of land.

FAQs on Acre - Unit of Measurement

Q1. What is an Acre Unit of Measurement?

Answer: Originally, an acre was considered as a section of land sized at 40 perches (660 ft, or 1 furlong) long and 4 perches (66 ft) wide; this may have also been acknowledged as an estimation of the amount of land a yoke of oxen could cultivate in one day (a furlong being "a furrow long"). A square circumscribing one acre is about 69.57 yards, or 63.61 metres (208 feet 9 inches), on a side. As an acre unit of measure, an acre has no specified shape. That being said, any area of measurement of 43,560 square feet is an acre.

Q2. How do we Convert Square Feet to Acres?

Answer: In one acre, there are 43,560 square feet. In order to convert from square feet to acres, we would require dividing the square footage by 43,560. For example, if we have to convert a land of 5,400,000 square yards, then we will divide 5,400,000/43,560 = 124 acres.

Q3. How to Calculate Acres if Square Yards are Given?

Answer: If measurements of a land area are available in yards, we would require calculating the square yardage by multiplying length and the width in yards. If the length is 1200 yards and the width of the parcel is 700 yards, then the area is 8,40,000 square yards. There are 4,840 square yards in an acre so dividing 8,40,000/4,840 will give us the number of acres, thus 174 acres.