Estimate video file size from duration and video plus audio bitrate.
Result
How to use this tool
Type the length in minutes.
Use Mbps, for example 10 for typical 1080p.
Use kbps, for example 192; leave 0 for silent video.
The headline result is in MB, with GB alongside.
Formula & worked example
One minute at 10 Mbps is 75 MB; one hour at 10 Mbps video plus 192 kbps audio is about 4.48 GB.
Limitations — read this before you rely on it
Constant-bitrate estimate. Variable-bitrate files and container overhead will differ slightly.
Frequently asked questions
Multiply the total bitrate by the duration and divide by 8 to convert bits to bytes.
Mbps is megabits per second; MB is megabytes. There are 8 bits in a byte, so 10 Mbps for 60 seconds is 75 MB.
A little: 192 kbps audio adds about 1.4 MB per minute on top of the video.
Variable-bitrate encoding uses more bits for complex scenes and fewer for simple ones, and containers add small overhead.
4K typically uses 25–80 Mbps depending on codec and quality, which this calculator handles like any other bitrate.