How to convert between different byte units in javascript

Converting bytes is a common task, especially during the development of computer programs. In JavaScript, sometimes we need to convert byte units to other units such as KB, MB, or even GB. This article explains how to use JavaScript to convert between different byte units.

JavaScript Byte Unit

In JavaScript, a byte is a basic data unit that represents the size of data stored in computer memory or hard disk. 1 byte is the data size of 8 bits (8 binary bits). All numbers, strings, and objects in JavaScript can be converted to bytes.

The following table lists some byte units used in JavaScript.

##Byte1 KB1024MB1024 * 1024GB1024

Unit	Memory size
	1024 1024

Conversion of byte units

Byte units Conversion between can be applied to data storage and transmission. For example, when we download a file, the file size is often displayed in bytes. In some cases, we may need to convert it to a larger unit to get a better idea of ​​the size of the file.

In JavaScript, we can use the following formula to convert bytes to larger units:

Byte = 1

KB = 1024 * Byte
MB = 1024 * KB
GB = 1024 * MB

Similarly, we can use the following formula to convert GB, MB, KB into bytes:

Byte = 1

KB = Byte / 1024
MB = KB / 1024
GB = MB / 1024

JavaScript byte conversion function

In order to simplify the byte conversion process, we can write some simple JavaScript functions to perform Convert. The following are some commonly used byte conversion functions:

function bytesToKB(bytes) {
  return bytes / 1024;
}

function bytesToMB(bytes) {
  return bytes / (1024 * 1024);
}

function bytesToGB(bytes) {
  return bytes / (1024 * 1024 * 1024);
}

function KBToBytes(kilobytes) {
  return kilobytes * 1024;
}

function MBToBytes(megabytes) {
  return megabytes * 1024 * 1024;
}

function GBToBytes(gigabytes) {
  return gigabytes * 1024 * 1024 * 1024;
}

These functions can accept a parameter representing the number of bytes that need to be converted. They convert bytes to different units and return a result.

Example

Let's look at an example that demonstrates how to use these functions for byte conversion.

const fileSize = 2147483648; // 2 GB in bytes
const fileSizeInKB = bytesToKB(fileSize); // 2097152 KB
const fileSizeInMB = bytesToMB(fileSize); // 2048 MB
const fileSizeInGB = bytesToGB(fileSize); // 2 GB

const sizeInKB = 800; // 800 KB in bytes
const sizeInMB = KBToMB(sizeInKB); // 0.78125 MB
const sizeInGB = KBToGB(sizeInKB); // 7.62939453125e-4 GB
const sizeInBytes = KBToBytes(sizeInKB); // 819200 bytes

In the above example, we used bytesToKB, bytesToMB and bytesToGB functions to convert 2GB to three different units. We also used the KBToMB, KBToGB, and KBToBytes functions to convert 800KB to different units, including bytes.

Conclusion

In JavaScript, byte unit conversion is a very common problem. We can use simple formulas and functions to convert bytes to larger units. In addition, these functions can also help us easily convert different byte units in our program.

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