公制
Embed This Widget
Add the script tag and a data attribute to embed this widget.
Embed via iframe for maximum compatibility.
<iframe src="https://unitfyi.com/iframe/glossary/metric-system-def/" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://unitfyi.com/glossary/metric-system-def/Add a dynamic SVG badge to your README or docs.
[](https://unitfyi.com/glossary/metric-system-def/)Use the native HTML custom element.
定义
基于十进制的国际计量系统，以七个SI基本单位为基础，除美国、缅甸和利比里亚外，世界各国均已正式采用。
解释
France introduced the metric system in 1799, initially defining the meter as one ten-millionth of the Earth's quadrant. The system's power lies in its decimal structure: converting between units requires only multiplying or dividing by powers of 10 (e.g., 1 km = 1,000 m = 100,000 cm). Science, medicine, and international trade use metric universally. The US customary system, while distinct, defines all its units in terms of metric equivalents since the Mendenhall Order of 1893.
RELATED ARTICLES
From milligrams to metric tons, this guide covers every major weight and mass unit with exact conversion factors, real-world examples, and a clear explanation of why weight and mass are not the same thing.
Volume Units Guide: Liters, Gallons, Cups, and MoreA thorough reference for every major volume unit—metric, US customary, imperial, and culinary—including exact conversion factors, US vs UK differences, and practical cooking and industrial examples.
Complete Guide to Length Units: From Nanometers to Light-YearsA comprehensive reference covering every major length unit—metric, imperial, nautical, and astronomical—with exact conversion factors and real-world scale examples.