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Create a QR code for a link, Wi-Fi, WhatsApp, contact and more, or read one from a photo.
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Video bitrate and file size calculator
Find the video bitrate for a target file size, or the file size for a bitrate and length.
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- Works on any device
About Video bitrate and file size calculator
Works out the video bitrate needed to hit a target file size, or the size a given bitrate and duration will produce. The basic formula is size equals bitrate times seconds divided by eight. Remember to subtract the audio bitrate, because audio takes part of the total too.
How to use Video bitrate and file size calculator
- Choose whether to find the bitrate or the file size.
- Enter the length of the video and the target size or bitrate.
- Read the result and use it in your encoder.
Why use this tool?
- Private: everything happens in your browser. Nothing you enter is uploaded.
- Free, with no sign-up, no watermark and no limit on how often you use it.
- Works on phones, tablets and computers: Android, iPhone, Windows, Mac and Linux. Nothing to install.
- Free to embed on your own website, with a ready-made code to copy.
- Available in 10 languages.
Also known as
Frequently asked questions
How do I calculate bitrate for a target file size?
Multiply the target size in megabits by 1000, divide by the duration in seconds, then subtract the audio bitrate. The tool does this in one step.
Should I include the audio bitrate?
Yes. The file holds audio and video together, so subtract the audio bitrate from the total to get the video bitrate. Skipping it makes the file bigger than planned.
Is the calculated size exact?
It is an estimate. Encoders vary the bitrate, and containers add a little overhead, so the real file may differ slightly from the figure.
Is Video bitrate and file size calculator free?
Yes. Video bitrate and file size calculator on Toolipedia is free to use, with no sign-up and no watermark.
Is it safe to use?
Yes. Everything is worked out in your browser, and nothing you enter is sent to our server.
Does it work on my phone?
Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.
Do I need an account?
No. Just open the page and use the tool. There's no sign-up and no email needed.
Can I put Video bitrate and file size calculator on my own website?
Yes. Use the Embed on your site button under the tool to copy a short piece of code and paste it into your page. It is free, needs no account, and the tool keeps working inside your page.