**How to Measure Millimeters: Rulers, Unit Conversions, & More - wikiHow**
https://www.wikihow.com/Measure-Millimeters

WebApr 26, 2023 · To measure in mm, hold a metric ruler against an object, count the number of whole cm of its length, and multiply by 10. Then add the remaining mm for the full length. To convert cm to mm, multiply the cm measurement by 10. For meters to mm, multiply by 1,000. For inches to mm, multiply the measurement in inches by 25.4.

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