mtools.lol

Bitrate Calculator

Find the video bitrate needed to hit a target file size.

How it works

  1. 1Enter the target file size and the video length.
  2. 2Enter the audio bitrate.
  3. 3Use the video bitrate in your encoder.

Features

  • Allows for container overhead.
  • Subtracts the audio bitrate for you.
  • kbps and Mbps.
  • Updates as you type.

Frequently asked questions

Why two-pass encoding?

Two-pass lets the encoder hit an average bitrate precisely, so the file lands close to the target size.

What audio bitrate should I use?

128 kbps AAC is fine for most videos; 96 kbps for speech.

Is anything sent to a server?

No. Everything is calculated in your browser.