Convert Square Millimeters to Square Miles

Enter the area in square millimeters below to get the value converted to square miles.

Results in Square Miles:
Loading content.
1 sq mm = 3.861E-13 sq mi

How to Convert Square Millimeters to Square Miles

Calculators can be used to convert measurements from one unit to another

To convert a square millimeter measurement to a square mile measurement, multiply the area by the conversion ratio. One square millimeter is equal to 3.861E-13 square miles, so use this simple formula to convert:

square miles = square millimeters × 3.861E-13

The area in square miles is equal to the square millimeters multiplied by 3.861E-13.

For example, here's how to convert 5 square millimeters to square miles using the formula above.
5 sq mm = (5 × 3.861E-13) = 1.9305E-12 sq mi

Square millimeters and square miles are both units used to measure area. Keep reading to learn more about each unit of measure.

Square Millimeters

One square millimeter is equal to the area of a square with edges that are 1 millimeter in length.

The square millimeter, or square millimetre, is a multiple of the square meter, which is the SI derived unit for area. In the metric system, "milli" is the prefix for 10-3. A square millimeter is sometimes also referred to as a square mm. Square millimeters can be abbreviated as sq mm, and are also sometimes abbreviated as mm². For example, 1 square millimeter can be written as 1 sq mm or 1 mm².

Square Miles

One square mile is equal to the area of a square with sides that are 1 mile long. One square mile is roughly equal to 2.59 square kilometers.

The square mile is a US customary and imperial unit of area. Square miles can be abbreviated as sq mi, and are also sometimes abbreviated as mi². For example, 1 square mile can be written as 1 sq mi or 1 mi².

Square Millimeter Measurements and Equivalent Square Mile Conversions

Common square millimeter values converted to the equivalent square mile value
Square Millimeters Square Miles
1 sq mm 0.0000000000003861 sq mi
2 sq mm 0.0000000000007722 sq mi
3 sq mm 0.0000000000011583 sq mi
4 sq mm 0.0000000000015444 sq mi
5 sq mm 0.0000000000019305 sq mi
6 sq mm 0.0000000000023166 sq mi
7 sq mm 0.0000000000027027 sq mi
8 sq mm 0.0000000000030888 sq mi
9 sq mm 0.0000000000034749 sq mi
10 sq mm 0.000000000003861 sq mi
11 sq mm 0.0000000000042471 sq mi
12 sq mm 0.0000000000046332 sq mi
13 sq mm 0.0000000000050193 sq mi
14 sq mm 0.0000000000054054 sq mi
15 sq mm 0.0000000000057915 sq mi
16 sq mm 0.0000000000061776 sq mi
17 sq mm 0.0000000000065637 sq mi
18 sq mm 0.0000000000069498 sq mi
19 sq mm 0.0000000000073359 sq mi
20 sq mm 0.000000000007722 sq mi
21 sq mm 0.0000000000081081 sq mi
22 sq mm 0.0000000000084942 sq mi
23 sq mm 0.0000000000088803 sq mi
24 sq mm 0.0000000000092665 sq mi
25 sq mm 0.0000000000096526 sq mi
26 sq mm 0.000000000010039 sq mi
27 sq mm 0.000000000010425 sq mi
28 sq mm 0.000000000010811 sq mi
29 sq mm 0.000000000011197 sq mi
30 sq mm 0.000000000011583 sq mi
31 sq mm 0.000000000011969 sq mi
32 sq mm 0.000000000012355 sq mi
33 sq mm 0.000000000012741 sq mi
34 sq mm 0.000000000013127 sq mi
35 sq mm 0.000000000013514 sq mi
36 sq mm 0.0000000000139 sq mi
37 sq mm 0.000000000014286 sq mi
38 sq mm 0.000000000014672 sq mi
39 sq mm 0.000000000015058 sq mi
40 sq mm 0.000000000015444 sq mi

More Square Millimeter Area Conversions

US Customary
Convert to Acres
1 sq mm is equal to 2.4711E-10 acres
Convert to Square Yards
1 sq mm is equal to 1.196E-6 square yards
Convert to Square Feet
1 sq mm is equal to 1.0764E-5 square feet
Convert to Square Inches
1 sq mm is equal to 0.00155 square inches
SI Units
Convert to Square Kilometers
1 sq mm is equal to 1.0E-12 square kilometers
Convert to Square Meters
1 sq mm is equal to 1.0E-6 square meters
Convert to Square Centimeters
1 sq mm is equal to 0.01 square centimeters
Other Metric Units
Convert to Hectares
1 sq mm is equal to 1.0E-10 hectares
Convert to Ares
1 sq mm is equal to 1.0E-8 ares