# Introduction

There are two major measurement systems in the world that are used to gauge distances, weights and volumes. These are the Imperial (British) system and the Metric system.

The vast majority of countries worldwide employ the metric system of measurement, which is comprised of units like meters, liters, and grams. Magnitudes of 10, 100, 1000 of these units are represented by the addition of appropriate prefixes such as deci, centi, and milli. Ex: centimeter, kilogram.

In the United States, the old imperial system of measurement is employed, which consists of units such as feet, inches and pounds.

# History

The imperial system, which is also called the British imperial since it originated in the British empire that ruled several regions across the globe from the 16th to the 20th century. One of these regions gained independence and later became the United States of America in the 18th century. The government of the nascent country decided to retain the Imperial measurement system, despite the popularity of the metric system in that era.

# Comparison

Following are some of the corresponding values between the Metric and British systems:

• A single mile is approximately 1.6 kilometers
• 1 inch is approximately 25 millimeters or 2.54 centimeters
• One meter is the same as a three foot measurement
• A kilogram is equivalent to 2.2 pounds
• 1 pound is equal to 454 grams
• A 100 pounds is the same as 7.14 stones

# Variations

There are other differences that arise when considering either of the measurement systems. For example, let us look at the way of observing temperature. Americans measure temperature in Fahrenheit, whereas people of other countries do so in centigrade.

Conversions for temperature include 0 degrees Celsius being equal to 32 degree Fahrenheit, which is essentially the freezing point. 24 degrees Celsius is tantamount to 75 degrees Fahrenheit, which means the weather is likely to be pleasant. The formula for conversion from C to F is, C multiplied by 1.8 and adding 32 to that number.

# Future

As it stands, there is no reason to expect the United States to follow suit and change to the metric system. As there are no imminent plans for the change, visitors traveling to USA should familiarize themselves with the British measurement system.