Conversion

The process of changing a value or expression from one form, unit, or system to another without changing its size or amount.

General2 min read

Definition

A Unit Conversion is the mathematical process of changing a value from one unit of measurement to another, without changing its actual size or amount.

Why It Matters

We live in a world with competing measurement systems. The United States uses the Imperial/Customary system (inches, pounds, Fahrenheit), while almost the entire rest of the world, including the scientific community, uses the Metric system (centimeters, kilograms, Celsius).

To convert between these systems, you must use a Conversion Factor. This is a specific number that you multiply or divide by to transition from one unit to the other.

Practical Example

Converting Inches to Centimeters

The exact conversion factor for inches to centimeters is 2.54. That means there are exactly 2.54 centimeters in 1 inch.

If you have a board that is 12 inches long, and you need to know its length in the metric system, you multiply 12 by 2.54.

12 × 2.54 = 30.48 centimeters.

You can easily swap between any measurement system using our Length Converter, Weight Converter, or Temperature Converter.

Frequently Asked Questions

What is a conversion factor?

A conversion factor is a number used to change one set of units to another, by multiplying or dividing. For example, 2.54 is the factor to convert inches to centimeters.