動画ビットレート計算
ビットレートとファイルサイズを計算
ブラウザで動作 · アップロード不要
このツールとページ内の説明は、現在は英語のみです。動作は同じで、すべてブラウザ内で実行されます。
1 MB = 1,000,000 bytes, as upload limits and phones count. About 2% is added for the file's own structure. Real results can differ a little, because encoders don't hit a bitrate exactly. The Video Compressor can aim for a file size for you.
Typical bitrates
| Resolution | Video bitrate (24–30 fps) |
|---|---|
| 4K (2160p) | 35–45 Mbps |
| 1440p | 16 Mbps |
| 1080p | 8 Mbps |
| 720p | 5 Mbps |
| 480p | 2.5 Mbps |
| 360p | 1 Mbps |
These are YouTube's recommended upload bitrates for H.264 video. Lower bitrates still work for sharing; fast motion needs more.
お使いのブラウザはこのツールを動かすには古すぎます。更新するか、最新の Chrome、Edge、Firefox、Safari をお使いください。
- 何も端末から出ません
- サーバーによるサイズ制限なし
- 登録不要・透かしなし
- 無料
How to use it
- Choose "Bitrate for a file size" or "File size for a bitrate".
- Enter the length, and the size or bitrate.
- Use the result in your video editor or in the Video Compressor.
How it is worked out
Size = (video bitrate + audio bitrate) × length, plus about 2% for the container. 1 MB here is 1,000,000 bytes, as most upload limits and apps count it.
Typical bitrates
| Video | Bitrate |
|---|---|
| 1080p 30 fps (YouTube upload) | 8 Mbps |
| 1080p 60 fps | 12 Mbps |
| 4K 30 fps | 35–45 Mbps |
| 720p for sharing | 2.5–5 Mbps |
Calculated in your browser
The calculations run in your browser as you type. Nothing you enter is sent anywhere.
よくある質問
What bitrate fits a 10-minute video in 1 GB?
About 13 Mbps in total, so roughly 12.8 Mbps for video with 128 kbps audio.
Is a higher bitrate always better?
Up to a point. Beyond the typical values above, files grow much more than the quality improves.