Convert Square Millimeters to Square Kilometers

Enter your square millimeter value in the form below to get the value calculated in square kilometers.

SWAP UNITS
Results in Square Kilometers:
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1 sq mm = 1.0E-12 sq km

How to Convert Square Millimeters to Square Kilometers

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

Convert square millimeters to square kilometers with this simple formula:

square kilometers = square millimeters × 1.0E-12

Converting a square millimeter area measurement to a square kilometer measurement involves multiplying the area by the conversion ratio to find the result. One square millimeter is equal to 1.0E-12 square kilometers, so to convert simply multiply by 1.0E-12.

For example:
5 sq mm = (5 × 1.0E-12) = 5.0E-12 sq km

Learn more about finding the area of your space using our area calculator.

Square millimeters and square kilometers are both units used to measure area. Learn more about area and find more area measurement conversion calculators. Square millimeters are a metric measurement and can be abbreviated as sq mm, for example 1 sq mm. Square kilometers are a metric measurement and can be abbreviated as sq km, for example 1 sq km. Learn more about the metric system, including the common unit prefixes and how to convert between metric units.

square millimeters and square kilometers are units used to measure area
Convert Square Kilometers to Square Millimeters

Square Millimeter Measurements and Equivalent Square Kilometer Conversions

Common square millimeter values converted to the equivalent square kilometer value
Square Millimeters Square Kilometers
1 sq mm 0.000000000001 sq km
2 sq mm 0.000000000002 sq km
3 sq mm 0.000000000003 sq km
4 sq mm 0.000000000004 sq km
5 sq mm 0.000000000005 sq km
6 sq mm 0.000000000006 sq km
7 sq mm 0.000000000007 sq km
8 sq mm 0.000000000008 sq km
9 sq mm 0.000000000009 sq km
10 sq mm 0.00000000001 sq km
11 sq mm 0.000000000011 sq km
12 sq mm 0.000000000012 sq km
13 sq mm 0.000000000013 sq km
14 sq mm 0.000000000014 sq km
15 sq mm 0.000000000015 sq km
16 sq mm 0.000000000016 sq km
17 sq mm 0.000000000017 sq km
18 sq mm 0.000000000018 sq km
19 sq mm 0.000000000019 sq km
20 sq mm 0.00000000002 sq km
21 sq mm 0.000000000021 sq km
22 sq mm 0.000000000022 sq km
23 sq mm 0.000000000023 sq km
24 sq mm 0.000000000024 sq km
25 sq mm 0.000000000025 sq km
26 sq mm 0.000000000026 sq km
27 sq mm 0.000000000027 sq km
28 sq mm 0.000000000028 sq km
29 sq mm 0.000000000029 sq km
30 sq mm 0.00000000003 sq km
31 sq mm 0.000000000031 sq km
32 sq mm 0.000000000032 sq km
33 sq mm 0.000000000033 sq km
34 sq mm 0.000000000034 sq km
35 sq mm 0.000000000035 sq km
36 sq mm 0.000000000036 sq km
37 sq mm 0.000000000037 sq km
38 sq mm 0.000000000038 sq km
39 sq mm 0.000000000039 sq km
40 sq mm 0.00000000004 sq km

More Square Millimeter Area Conversions

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