How do I convert file size to mb only in JavaScript?

Question

How do I convert file size to MB only in JavaScript, It comes back as a long INT sometimes and I would like to convert this to a MB instead of it showing bytes or kb.

If possible I would like too also make it show as result like this example("0.01MB"), if it is under the 1 MB.

Answer 1

var sizeInMB = (sizeInBytes / (1024*1024)).toFixed(2); alert(sizeInMB + 'MB'); 

Answer 2

Javscript ES5 or earlier:

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

Javscript ES6 (arrow functions):

const bytesToMegaBytes = bytes => bytes / (1024*1024); 

If you want to round to exactly digits after the decimal place, then:

function (bytes, roundTo) {   var converted = bytes / (1024*1024);   return roundTo ? converted.toFixed(roundTo) : converted; } 

In E6 or beyond:

const bytesToMegaBytes = (bytes, digits) => roundTo ? (bytes / (1024*1024)).toFixed(digits) : (bytes / (1024*1024)); 

1. Details on Number.prototype.toFixed().
2. Below you can view file size conversion table, for future help. Conversion table