US Calculators

Acre to Square Mile Converter

The Acre to Square Mile Converter is a user-friendly online tool, for quickly converting Square Acre to Square Mile.

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Acre to Square Mile Converter

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Acre to Square Mile Converter

Simplifying Land Measurements
Size is important when you are working with land measurements, especially if you are in fields of real estate, agriculture, or geography, and therefore it is important to communicate size in the right units. There are two commonly used units for measuring land, acres and square miles. The Acre to Square Mile Converter helps users switch units fast and eliminates decision errors that are associated with solving the calculations on their own.

About Acre and Square Mile

About Acre Definition:
An acre is most commonly referred to as land measurement, used in the imperial and US customary systems.
Size: It is one acre, (approximately) of 4,840 square yards, 43,560 square feet, or 4,047 square meters.
History: An aces field derives its name from the Old English æcer, for a field. Apparent from which equivalent it came; the quantity of land he could plow in a day with a yoke of oxen.
Usage: Acre is the measurement metric used in the countries of the United States, Canada, and the UK to measure agricultural fields, residential plots, and recreational areas.

About Square Mile Definition:
A square mile is much bigger than that; it is the size of an area, which equals the square with sides that are one mile long. Size: One-mile square measures out to 640 acres; 27,878,400 square feet; or approximately 2.59 square kilometers. Usage: Large-scale measurements such as cities, counties, states, and national territories are often squared around in square miles.

Difference Between Acre and Square Mile

Acre to Square Mile Converter
Aspect Acre Square Mile
Size Smaller (1 acre = 1/640 of a square mile) Larger (1 square mile = 640 acres)
Applications Used for smaller land parcels like farms, plots, or parks Used for larger areas like cities or regions
Measurement Basis Based on smaller, traditional field sizes Reflects broader geographical or administrative areas

100 Acre to Square Mile conversion formula and example

 The conversion factor: of 1 acre is approximately equal to square acre / 640

Square Miles=Square Acres640

Let's Convert 100 acres to square miles

Square Miles=100640

Square Miles≈0.15625

So, 100 acres is approximately equal to 0.15625 square miles.

Interesting Facts

Smallest Land Measurement: Although the acre is small compared to a square mile, it’s still bigger than the average football field, which is 1.32 acres.
Largest Square Mile Areas: Square miles are often cited for such large states as Texas (268,597 square miles), Alaska (663,300 square miles), and Louisiana (43,293 square miles).
Historical Usage: In medieval England, land tended to be measured in acres rather than square miles, which were not seen often until cartography and large-scale mapping became common.

A Table for Acre to Square Mile conversion

Acre to Square Mile Converter
Acres Square Miles
1 0.0015625 mi2
2 0.003125 mi2
3 0.0046875 mi2
4 0.00625 mi2
5 0.0078125 mi2
6 0.009375 mi2
7 0.0109375 mi2
8 0.0125 mi2
9 0.0140625 mi2
10 0.015625 mi2
20 0.03125 mi2
30 0.046875 mi2
40 0.0625 mi2
50 0.078125 mi2
60 0.09375 mi2
70 0.109375 mi2
80 0.125 mi2
90 0.140625 mi2
100 0.15625 mi2

References:

1 . National Institute of Standards and Technology (NIST). (2022). "NIST Guide to SI Units - Appendix B8: Factors for Units Listed Alphabetically." 

 2 . United States Geological Survey (USGS). (2022). "Unit Conversions."  

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