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Video Bitrate and File Size Calculator
Enter any two values and the third is calculated automatically. Plus recommended bitrates by resolution.
100% in-browser — nothing is uploaded
Solve for
File size
600.0 MB
Formula
Size (MB) = (video bitrate + audio bitrate) in kbps × duration in seconds ÷ 8 ÷ 1024
Recommended bitrates
| Resolution | FPS | Standard | High quality |
|---|---|---|---|
| 480p | 24–30 | 2.5 Mbps | 4 Mbps |
| 720p | 24–30 | 5 Mbps | 7.5 Mbps |
| 1080p | 24–30 | 8 Mbps | 12 Mbps |
| 1080p | 50–60 | 12 Mbps | 18 Mbps |
| 1440p | 24–30 | 16 Mbps | 24 Mbps |
| 2160p (4K) | 24–30 | 35 Mbps | 45 Mbps |
| 2160p (4K) | 50–60 | 53 Mbps | 68 Mbps |
Frequently asked questions
- What's the difference between Mbps and MB?
- Mbps is a rate (megabits per second); MB is a size (megabytes). There are 8 bits in a byte, which is why the formula divides by 8.
- What bitrate should I use for YouTube?
- For 1080p at 30 fps YouTube suggests around 8 Mbps, and for 4K around 35–45 Mbps. The table below gives a starting point.