Video File Size Calculator
Fill in the values and the answer updates as you type.
How the Video File Size Calculator works
File size = (video bitrate + audio bitrate) × duration ÷ 8. Example: 8 Mbps video with 128 kbps audio for 10 minutes is about 609 MB. Sizes use decimal units (1 GB = 1,000 MB) and ignore container overhead, which adds a small amount.
Inputs and results
The Video File Size Calculator takes 3 inputs and gives 4 results.
What you enter
- Video bitrate (Mbps) — starts at 8.
- Audio bitrate (kbps) — starts at 128.
- Duration (minutes) — starts at 10.
What you get
- File size (MB)
- File size (GB)
- Size per hour (GB)
- Total bitrate (Mbps)
Video File Size Calculator FAQ
How do I use the Video File Size Calculator?
Enter video bitrate, audio bitrate and duration in the fields, then read file size (mb), file size (gb), size per hour (gb) and total bitrate (mbps) in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Video File Size Calculator calculate?
Estimate file size from bitrate and duration. It returns file size (mb), file size (gb), size per hour (gb) and total bitrate (mbps) from the 3 values you provide.
What values does the Video File Size Calculator start with?
It opens with video bitrate 8 Mbps, audio bitrate 128 kbps and duration 10 minutes so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Video File Size Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Video File Size Calculator for important decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.