How do you calculate inches?

How do you calculate inches?

In daily life, we often hear the term "several inches", such as mobile phone screen, TV size, photo size, etc. So, how is "inch" calculated? This article will give you a detailed analysis of the definition, calculation method and common application scenarios of "inch".

1. Definition of inch

"Cun" is the traditional Chinese unit of length, but in modern applications it usually refers to inches. 1 inch equals 2.54 centimeters. It should be noted that China's "market inch" is different from inches. 1 market inch is approximately equal to 3.33 centimeters. Therefore, when discussing the dimensions of electronics, we usually refer to inches.

2. Calculation method of “inch” in common scenarios

1.screen size: The "inch" of the screen refers to the diagonal length. For example, a 55-inch TV means that the diagonal length of the screen is 55 inches (approximately 139.7 cm).

2.photo size: The "inch" of a photo usually refers to the length of the short side of the photo. For example, the short side of a 5-inch photo is usually 5 inches (approximately 12.7 cm) and the long side is usually 7 inches (approximately 17.8 cm).

3.tire size: The "inch" of the tire refers to the diameter of the wheel hub. For example, a 16-inch tire has a wheel diameter of 16 inches (approximately 40.64 cm).

3. Common size comparison table

4. How to measure "inch"

1.screen size: Use a soft ruler or measuring tape to measure the diagonal length of the screen in inches. If the measurement is in centimeters, divide by 2.54 to convert to inches.

2.photo size: Directly measure the length of the short side of the photo in inches.

3.tire size: The side of the tire is usually marked with size information, such as "R16" indicating a wheel diameter of 16 inches.

5. Things to note

1. When purchasing electronic products, be sure to confirm whether "inch" refers to inches or market sizes to avoid size discrepancies due to unit confusion.

2. The actual display area of the screen may be slightly smaller than the nominal size due to bezel design.

3. The calculation method of the "inch" of the photo and the "inch" of the screen are different, so please pay attention to the distinction.

6. Summary

"Inch" is a common unit of size and has different calculation methods in different scenarios. Understanding its definition and conversion method can help us select and use products more accurately. Whether you are buying a TV, a mobile phone, or developing photos, mastering the "inch" calculation method can help you get twice the result with half the effort.

I hope that through the introduction of this article, you can have a clearer understanding of "how to calculate inches". If you have other questions about size, please leave a message to discuss!