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

Convert Square Millimeters to Square Inches

Convert from square millimeters to square inches with this simple formula:
square inches = square millimeters × 0.00155
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1 Square Millimeter = 0.00155 Square Inches

Learn How to Convert Square Millimeters to Square Inches Using our Conversion Formula

Converting a square millimeter area measurement to a square inch measurement involves multiplying your area by the conversion ratio to find the result. A square millimeter is equal to 0.00155 square inches, so to convert simply multiply by 0.00155.

For example, 5sq mm = (5 × 0.00155) = 0.00775sq in.

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

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

square millimeters and square inches are units used to measure area
Convert Square Inches to Square Millimeters

More Area Conversions

Convert to Acres Area
1sq mm is equal to 2.4711E-10 acres
Convert to Square Miles Area
1sq mm is equal to 3.861E-13 square miles
Convert to Square Yards Area
1sq mm is equal to 1.196E-6 square yards
Convert to Square Feet Area
1sq mm is equal to 1.0764E-5 square feet
Convert to Square Kilometers Area
1sq mm is equal to 1.0E-12 square kilometers
Convert to Square Meters Area
1sq mm is equal to 1.0E-6 square meters
Convert to Square Centimeters Area
1sq mm is equal to 0.01 square centimeters

Square Millimeter Measurements and Equivalent Square Inch Conversions

Common square millimeter values converted to the equivalent square inch value
Square Millimeters Square Inches Square Millimeters Square Inches Square Millimeters Square Inches
1 0.00155 21 0.03255 41 0.06355
2 0.0031 22 0.0341 42 0.0651
3 0.00465 23 0.03565 43 0.06665
4 0.0062 24 0.0372 44 0.0682
5 0.00775 25 0.03875 45 0.06975
6 0.0093 26 0.0403 46 0.0713
7 0.01085 27 0.04185 47 0.07285
8 0.0124 28 0.0434 48 0.0744
9 0.01395 29 0.04495 49 0.07595
10 0.0155 30 0.0465 50 0.0775
11 0.01705 31 0.04805 51 0.07905
12 0.0186 32 0.0496 52 0.0806
13 0.02015 33 0.05115 53 0.08215
14 0.0217 34 0.0527 54 0.0837
15 0.02325 35 0.05425 55 0.08525
16 0.0248 36 0.0558 56 0.0868
17 0.02635 37 0.05735 57 0.08835
18 0.0279 38 0.0589 58 0.0899
19 0.02945 39 0.06045 59 0.09145
20 0.031 40 0.062 60 0.093