Instant Unit Converter

Convert Square Millimeters to Square Inches

Convert Square Millimeters (mm²) to Square Inches (in²) instantly. Enter a value below and the result updates live — accurate to 8 significant figures. 1 Square Millimeters = 0.0015500031 Square Inches.

Square Millimeters to Square Inches formula

Multiply the Square Millimeters value by 0.0015500031.

in² = mm² × 0.0015500031000062003

Square Millimeters to Square Inches conversion table

Square Millimeters (mm²) Square Inches (in²)
1 0.0015500031
5 0.0077500155
10 0.015500031
20 0.031000062
50 0.077500155
100 0.15500031
500 0.77500155
1000 1.5500031
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Square Millimeters to Square Inches — FAQ

What is 1 mm² in in²?
1 Square Millimeters (mm²) equals 0.0015500031 Square Inches (in²). For example, 10 mm² = 0.015500031 in².
How do I convert Square Millimeters to Square Inches?
Multiply the Square Millimeters value by 0.0015500031. Or simply type any value into the converter above and the Square Inches result updates instantly.
Is the Square Millimeters to Square Inches conversion accurate?
Yes. The conversion uses the exact internationally-defined factor: 1 mm² = 0.0015500031000062003 in². Results are shown to 8 significant figures.

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