## Understanding the Metric System

The **Metric System** is an international decimal-based unit of measurement. Originally envisaged in France in the late 18th century, it is the official system of measurement for every nation in the world except for the **United States**. The key units used in the metric system include meters for length, grams for mass, and liters for volume.

The metric system is unique in its simplicity and accuracy. It employs a simple, logical scale base on powers of ten, which simplifies calculations and conversions. One such conversion is from centimeters (cm) to inches, two units of length prevalent in the metric and the **imperial system** respectively.

## Meaning of 20cm To Inches

When somebody asks “how many inches in 20 centimeters?”, they refer to the conversion of **20 cm to inches**. This is a unit conversion process translating a measurement presented in a certain **unit of measure** (in this case, centimeters) into another (in this case, inches).

These conversions are immensely critical, especially when dealing with measurements between countries using different measurement systems. They enable smooth international cooperation and communication, and are one of the primary paths towards global standardization of measurements.

## How To Convert 20 cm

The act to **Convert 20 cm** to inches requires a specific **centimeter to inches formula**. The conversion factor used to change from centimeters to inches is 0.393701 inches (approximately 0.4 inches).

To perform the conversion, you multiply the measurement in centimeters by the conversion factor. In this case, hence, to convert 20 cm to inches, you would multiply 20 by 0.393701.

## The Inch as a Unit

An **Inch is a Unit** predominantly used in the United States, United Kingdom, and a few other countries that are not widely metric. It’s officially defined as 1/12 of a foot. Although not as uniform globally as the metric system, inches are widely recognised and used.

An **Inch is defined** as exactly 25.4 millimeters (or 2.54 cm) under the international yard and pound agreement. This agreement was made between six nations in 1959, including the United States.

## 20 Centimeters is Equal To What Measurement?

A common unit conversion query is “what **20 centimeters is equal** to in inches?” This question implies a conversion from centimeters to inches, and using our conversion factor mentioned earlier (0.393701), the answer is found.

Doing the math (20 centimeters multiplied by the conversion factor of 0.393701), we find that 20 centimeters is approximately equal to 7.87402 inches.

## Customary Units and British Measurement System

The **Customary Units and British** Measurement System, also known as the Imperial system, is commonly used in the United States rather than the metric system. It comprises of units such as inches, feet, yards, miles, ounces, and pounds.

The Imperial system originated from various traditional systems of weights and measures, particularly the Winchester Standards. Despite the global popularity of the metric system, customary and British units remain widely used in the United States today.

## Formula and Conversion Factors

The **formula and conversion factor** used for converting centimeters to inches is quite simple. It is a straightforward multiplication operation carried out using the conversion factor which converts centimeters into inches (0.393701).

For instance, to convert 20 centimeters, you would multiply 20 by 0.393701. This would result in approximately 7.87402 inches.

## Introducing the Unit Converter

A **unit converter** is an application that performs automatic conversions between various units of a given quantity. Whether on a smartphone app or web application, unit converters simplify the conversion process.

When asked “how many **inches is 20** centimeters?” For instance, a unit converter calculates that automatically and more efficiently based on inbuilt **centimeters to inches** conversion formula.

## Length Approximately Equivalent To In Inches

Therefore, a length of 20 centimeters **equals 7.87402 inches**, when approximated to six decimal places.

This conversion is helpful when you need to compare measurements when using different units of lengths, such as during international trade, travel, or scientific research.

## FAQ

### What is the importance of knowing how to convert 20 cm to inches?

Being able to convert 20 cm to inches allows for effective communication and understanding between different countries using varying systems of measurement. Especially in the United States, where the customary unit system is used, understanding this conversion is vital.

### How is an inch defined?

An inch is defined as exactly 25.4 millimeters (or 2.54 centimeters) according to the international yard and pound agreement affecting six nations in 1959.

### Why does the United States still use the Imperial System?

Historical basis and educational costs are some of the main reasons for the US’ continued use of the Imperial System. While efforts to metricate have been in place, change has been slow due to the existing infrastructural and societal usage of Imperial units.

### What equals 7.87402 inches in centimeters?

7.87402 inches is equal to 20 centimeters, based on the direct conversion formula and conversion factor.

### How can I convert 20 centimeters to inches?

To convert 20 cm to inches, multiply the quantity (20) by the conversion factor (0.393701).

### Is an inch a universally recognized unit?

Yes, an inch is a universally recognized and used unit, despite the metric system being standard in most countries.

### What are customary units?

Customary units are a system of measurements commonly used in the United States, including units like inches, feet, pounds, and gallons.

### Are there tools to help with unit conversion?

Absolutely. Unit converters are available online and as apps. They’re designed to perform unit conversions, saving you the time taken and errors associated with manual calculations.

### How precise is the conversion from centimeters to inches?

The conversion from centimeters to inches is very precise when using the defined conversion factor, which provides a result accurate up to six decimal places.

### When will I need to know how many inches are in 20 centimeters?

This conversion can be useful during travel, international trade, education, or when working on a task involving measurements expressed in the non-familiar system of units.