![]() Height is commonly measured in centimeters outside of countries like the United States. Learning some of the more commonly used metric prefixes, such as kilo-, mega-, giga-, tera-, centi-, milli-, micro-, and nano-, can be helpful for quickly navigating metric units.Ĭurrent use: The centimeter, like the meter, is used in all sorts of applications worldwide (in countries that have undergone metrication) in instances where a smaller denomination of the meter is required. Metric prefixes range from factors of 10 -18 to 10 18 based on a decimal system, with the base (in this case the meter) having no prefix and having a factor of 1. We list the official World Athletics (formerly IAAF) world records wherever possible and filled in from other sources in the distances that the World Athletics doesn’t maintain. Our world records come from a few different sources. History/origin: A centimeter is based on the SI unit meter, and as the prefix "centi" indicates, is equal to one hundredth of a meter. Here is a complete list of running world records from 100 meters up through 100 miles for both women and men. 1 kilometre 1000: metres: 3281: feet: 1094: yards: 0.621 miles: 0.540 nautical miles: 6.68 × 10 9: astronomical units: 1.06 × 10 13: light-years: 3. Centimeterĭefinition: A centimeter (symbol: cm) is a unit of length in the International System of Units (SI), the current form of the metric system. Unlike the United States, the UK has adopted the metric system while the metric system is widely used in government, commerce, and industry, remnants of the imperial system can still be seen in the UK's use of miles in its road systems. However, there still remain a number of countries that primarily use the mile instead of the kilometer including the United States and the United Kingdom (UK). This definition is subject to change, but the relationship between the meter and the kilometer will remain constant.Ĭurrent use: It is currently the official unit of measurement for expressing distances between geographical places on land in most of the world. The origin of the kilometer is linked to that of the meter, and its current definition as the distance traveled by light in 1/299 792 458 second. One kilometer is therefore one thousand meters. History/origin: The prefix kilo- is a metric prefix indicating one thousand. ![]() One kilometer is equivalent to 0.6214 miles. Definition: A kilometer (symbol: km) is a unit of length in the International System of Units (SI).
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