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What is the opposite of the metric system?

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Countries that don't use the metric system use imperial units, a legacy system based on ancient measurements. Feet, miles, gallons, quarts, pounds and ounces are all part of the imperial system. This system came from that used in Great Britain, standardized by the Weights and Measures Act of 1824.

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The chief drawback of the imperial system is the difficulty of converting units. For example, converting inches to feet requires dividing a number by 12, while converting centimeters to meters merely requires a decimal point shift of two places.

Most countries have adopted the metric system for most measurements. The only countries that still rely on the imperial system are the United States, Myanmar and Liberia.

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Related Questions

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Disadvantages of the metric system include the difficulty of United States citizens learning the new system, businesses being out the expense to redesign products and equipment to metric standards and the expense associated with revising road signs. Detractors of the metric system prefer English measures of halves and quarters instead.

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The first letters of the most popular prefixes in the metric system can be remembered by memorizing the phrase "King Henry doesn't usually drink chocolate milk." The first letter in each word of the phrase corresponds in descending order with the first letters of prefixes kilo, hecto, deca, unit, deci, centi and milli.

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A metric system conversion chart is used to convert between different units in the metric system. It may also provide conversion information to switch from units in the metric system to units in the imperial system of measurement.