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Decimeter (dm) - Definition and Overview

What is Decimeter?

Decimeter(dm) is a unit of length in the metric system. The term “Deci” means one-tenth, and therefore decimetre means one-tenth of a meter.

Summary

  • The decimeter is a unit of length in the metric system equal to one tenth of a meter
  • It is not as commonly used as other metric units like the centimeter or meter, but it can be useful for measuring medium-sized objects and distances
  • The decimeter is often used in educational contexts to help students understand the metric system.

Author Information

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Rajesh V U

Full-Stack Developer & Storage Technologist | Creator of UnitSmash.com
Last updated: June 1, 2026

I am a Storage Technologist with strong experience in enterprise storage systems, Angular development, and web-based tools. I enjoy building practical calculators, converters, and utilities, and I also create original cartoons. I share my tools, articles, and creative work on my personal website, rajeshvu.com.