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HTML | DOM Audio duration Property

  • Last Updated : 14 Nov, 2019

The Audio duration property is used for returning the length of an audio. The Audio duration property returns the value in seconds.
Different browsers return different precision values such as with safari returning up to 14 decimal places followed by opera returning up to 9 decimal places.
The Audio duration property is a read-only property.
The Audio duration function returns “NaN” if no video is set whereas if the audio is streamed and has no predefined length, it returns “Inf” (Infinity).



Below program illustrates the Audio duration Property:
Example: Getting the length of an audio.

<!DOCTYPE html>
        Audio duration Property
<body style="text-align:center">
    <h1 style="color:green">
    <h2 style="font-family: Impact">
      Audio duration Property
    <audio id="Test_Audio" controls>
        <source src="sample1.ogg" 
        <source src="sample1.mp3" 
    <p>To get the exact length of the audio,
      double click the "Return Audio Length" button.
    <button ondblclick="My_Audio()">
      Return Audio Length
    <p id="test"></p>
        var a = document.getElementById("Test_Audio");
        function My_Audio() {
            var a = document.getElementById(
            document.getElementById("test").innerHTML = a;


  • Before clicking the button:
  • After clicking the button:

Supported Browsers: The browser supported by HTML | DOM Audio duration Property are listed below:

  • Google Chrome
  • Internet Explorer
  • Firefox
  • Opera
  • Apple Safari

Attention reader! Don’t stop learning now. Get hold of all the important HTML concepts with the Web Design for Beginners | HTML  course.

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