acres to square miles

Easily convert acres to square miles with our intuitive tool. Ideal for real estate professionals, surveyors, and anyone needing accurate land measurements. Simply enter your value in acres to get instant results in square miles. Make your calculations effortless with our reliable converter.

0square miles
We are converting 1 acres to square miles with our online unit calculator.

Acres to square miles conversion: Divide the value in acres by 640 to get the equivalent in square miles.

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Acres

Definition

An acre (symbol: ac) is a unit of area commonly used in the Imperial and US customary measurement systems. One acre is equivalent to 43,560 square feet, or about 4,047 square meters.

History/Origin

The acre has its origins in the Middle Ages, where it was defined as the amount of land that could be plowed in one day by a yoke of oxen. The size of an acre varied over time and by region until it was standardized in the 19th century to 43,560 square feet.

Current Use

Acres are commonly used in the United States, the United Kingdom, and other countries that use the Imperial system to measure large areas of land, such as farms, forests, and real estate properties. It is a standard unit of measurement in real estate transactions, agricultural land measurement, and land planning.

Square Miles

Definition

A square mile (symbol: sq mi or mi²) is a unit of area used in the Imperial and US customary measurement systems. One square mile is equivalent to 640 acres or about 2.59 square kilometers.

History/Origin

The square mile originated from the mile, a unit of length that has been used since Roman times. The use of the square mile as a unit of area became more standardized with the introduction of the Imperial system in the 19th century.

Current Use

Square miles are commonly used in the United States, the United Kingdom, and other countries that use the Imperial system to measure large geographic areas, such as cities, counties, and entire countries. It is a standard unit of measurement in geography, land planning, and environmental studies.

Conversion Details

Conversion Formula and Factor

To convert from acres to square miles, you can use the following formula:


  • Acres to square miles: ( \text{sq mi} = \frac{\text{ac}}{640} )

Quick Reference Conversion Table

Acres

Square Miles

1

0.00156

100

0.15625

200

0.3125

500

0.78125

1,000

1.5625

Step-by-Step Conversion Instructions

Example: Convert 320 acres to square miles

  1. Convert Acres to Square Miles:

    • Use the formula: ( \text{sq mi} = \frac{\text{ac}}{640} )

    • Calculation: ( \frac{320}{640} = 0.5 ) sq mi

Practical Examples

  1. Example 1: If you have a plot of land that is 480 acres, convert it to square miles using the formula (480 acres (\div) 640 = 0.75 sq mi).

  2. Example 2: For a farm that is 1,200 acres, convert to square miles using the formula (1,200 acres (\div) 640 = 1.875 sq mi).

Common Conversions

Latest Conversions

Frequently Asked Questions

There are 640 acres in one square mile, which is commonly used in U.S. land area measurements.