The main purpose of introducing the metric system was to have a single unit of measurement used all over the world - a common standard. The main problem with the imperial system is that it is not standard. Not only is SI (international system, the current version of the metric system) already used in most countries, but definitions of units such as "pound" vary from one country to another. The meter, kilogram, etc. are standardized internationally.
Other reasons to use the international system is that the units are consistent, making several formulae simpler (i.e., no additional conversion factors required in some formulae), and especially the metric prefixes, which make it much easier to convert from large to small units and vice versa. For example, to convert 17 kilometers to meters, multiply by 1000. You can easily do this calculation in your head. Now try converting 17 miles to feet, or to inches.
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Tradition.
Yes, the Metric System is used more frequently than the Imperial System of Measurements, especially in scientific and international contexts. The Metric System is based on units that are easily converted by factors of 10, making it more efficient and consistent than the Imperial System.
Metric sockets are measured in millimeters while imperial sockets are measured in inches. Metric sockets are commonly used in countries that use the metric system, whereas imperial sockets are used in countries that use the imperial system. It's important to use the correct type of socket to match the measurement system of the fasteners being used.
The two types of measurement systems are the metric system and the imperial system. The metric system is used worldwide and is based on units of ten, while the imperial system is primarily used in the United States and is based on historical British units.
I was taught the imperial system whilst a schoolboy in the UK, many years ago. So I prefer imperial rather than metric. But, as metric is becoming the norm, I have become familiar with both systems.