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1 inch = 25.4 millimeters

3.5 inches = (3.5 x 25.4) = 88.9 millimeters (rounded)

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Q: What is Three and a half inches equal to in millimeters?
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Related questions

What is 5 millimeters?

5 millimeters is half of a centimetre. It is approximately equal to 0.2 inches.

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