File size = bitrate ร duration. Enter your numbers or pick a preset โ get MB/GB instantly, plus how many minutes fit in a gigabyte.
| Format | Video bitrate | 1 minute โ |
|---|---|---|
| YouTube 1080p 30fps | 8 Mbps | 61 MB |
| YouTube 1080p 60fps | 12 Mbps | 91 MB |
| YouTube 4K 60fps | 35โ53 Mbps | 270โ400 MB |
| Shorts / Reels / TikTok 1080p | 6โ10 Mbps | 45โ75 MB |
| Web embed / preview | 2โ4 Mbps | 15โ30 MB |
Size = (video bitrate + audio bitrate) ร duration รท 8. Bitrate is measured in bits per second, file size in bytes โ dividing by 8 converts bits to bytes. Container overhead adds roughly 1โ2%.
Only indirectly. File size depends on bitrate, not resolution โ but higher resolutions need higher bitrates to look good, which is why 4K files are bigger.
AI video services typically deliver 2โ5 Mbps H.265 files to save bandwidth โ that's why a 5-second Seedance or Vidu clip is only 2โ3 MB. Re-encode at a higher bitrate before heavy editing to avoid compounding compression.