Convert Square Millimeters to Acres

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

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1 sq mm = 2.4711E-10 ac

How to Convert Square Millimeters to Acres

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

To convert a square millimeter measurement to a acre measurement, multiply the area by the conversion ratio. One square millimeter is equal to 2.4711E-10 acres, so use this simple formula to convert:

acres = square millimeters × 2.4711E-10

The area in acres is equal to the square millimeters multiplied by 2.4711E-10.

For example, here's how to convert 5 square millimeters to acres using the formula above.
5 sq mm = (5 × 2.4711E-10) = 1.2355E-9 ac

Square millimeters and acres 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.


One acre is defined as the area equal to a space that is one chain (66 ft) by one furlong (660 ft), or 10 square chains. That's equal to 43,560 square feet for those unfamiliar with those units of measure.

The acre is a US customary and imperial unit of area. Acres can be abbreviated as ac, for example 1 acre can be written as 1 ac.

Try our acreage calculator to find the area of a plot of land in acres by locating the boundaries on a map.

Square Millimeter Measurements and Equivalent Acre Conversions

Common square millimeter values converted to the equivalent acre value
Square Millimeters Acres
1 sq mm 0.00000000024711 ac
2 sq mm 0.00000000049421 ac
3 sq mm 0.00000000074132 ac
4 sq mm 0.00000000098842 ac
5 sq mm 0.0000000012355 ac
6 sq mm 0.0000000014826 ac
7 sq mm 0.0000000017297 ac
8 sq mm 0.0000000019768 ac
9 sq mm 0.0000000022239 ac
10 sq mm 0.0000000024711 ac
11 sq mm 0.0000000027182 ac
12 sq mm 0.0000000029653 ac
13 sq mm 0.0000000032124 ac
14 sq mm 0.0000000034595 ac
15 sq mm 0.0000000037066 ac
16 sq mm 0.0000000039537 ac
17 sq mm 0.0000000042008 ac
18 sq mm 0.0000000044479 ac
19 sq mm 0.000000004695 ac
20 sq mm 0.0000000049421 ac
21 sq mm 0.0000000051892 ac
22 sq mm 0.0000000054363 ac
23 sq mm 0.0000000056834 ac
24 sq mm 0.0000000059305 ac
25 sq mm 0.0000000061776 ac
26 sq mm 0.0000000064247 ac
27 sq mm 0.0000000066718 ac
28 sq mm 0.000000006919 ac
29 sq mm 0.0000000071661 ac
30 sq mm 0.0000000074132 ac
31 sq mm 0.0000000076603 ac
32 sq mm 0.0000000079074 ac
33 sq mm 0.0000000081545 ac
34 sq mm 0.0000000084016 ac
35 sq mm 0.0000000086487 ac
36 sq mm 0.0000000088958 ac
37 sq mm 0.0000000091429 ac
38 sq mm 0.00000000939 ac
39 sq mm 0.0000000096371 ac
40 sq mm 0.0000000098842 ac

More Square Millimeter Area Conversions

US Customary
Convert to Square Miles
1 sq mm is equal to 3.861E-13 square miles
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