Question

How to convert bytes to KB or MB or GB or TB or PB or EB or ZB or YB in JavaScript

Answer 1

function convert_file_size(bytes, decimals = 2) {
   	if (bytes === 0) return '0 Bytes';
   
    const unit = 1024;
    const dec = decimals < 0 ? 0 : decimals;
    const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];

    const i = Math.floor(Math.log(bytes) / Math.log(unit));

    return parseFloat((bytes / Math.pow(unit, i)).toFixed(dec)) + ' ' + sizes[i];
}
  
  
console.log(convert_file_size(63521));
console.log(convert_file_size(37913521));
console.log(convert_file_size(3789913521));
console.log(convert_file_size(3723789913521));
console.log(convert_file_size(3399829987913521));
console.log(convert_file_size(9853399998791352198));
console.log(convert_file_size(9853399998424791352198));
console.log(convert_file_size(100985339999842450791352198));
  
    
    
/*
run:
    
"62.03 KB"
"36.16 MB"
"3.53 GB"
"3.39 TB"
"3.02 PB"
"8.55 EB"
"8.35 ZB"
"83.53 YB"
       
*/

 

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