How Big Will Your Bilibili Download Be?
Pick a quality tier, enter the video length, and get an instant estimated file size — right here in your browser. No upload, no sign-up.
Availability depends on the video and the uploader’s source quality (and your account level for some tiers on Bilibili).
Type minutes (like 25) or minutes:seconds (like 12:30).
| Quality | Estimated bitrate | Estimated size |
|---|
How these estimates work
These figures are estimates, not measurements. File size depends on bitrate — how much data each second of video carries. We multiply a conservative, widely plausible bitrate range by the video’s length:
Estimated MB = bitrate (Mbps) × seconds ÷ 8
| Tier | Estimated bitrate range used | Example: 10-min video |
|---|---|---|
| 360p | ~0.6–1 Mbps | ~45–75 MB |
| 480p | ~1–1.8 Mbps | ~75–135 MB |
| 720p | ~2–3.5 Mbps | ~150–263 MB |
| 1080p | ~4–7 Mbps | ~300–525 MB |
| 4K | ~14–22 Mbps | ~1.0–1.6 GB |
These ranges assume H.264-style encoding, the most common codec on Bilibili. Actual sizes vary with content complexity — fast-moving action or animation with fine detail needs more bitrate than a static talking-head video, and HEVC (H.265) or AV1 encodes can run noticeably smaller than these estimates.
Data-saving tips
- Pick 720p for phones. On a small screen, 720p looks great and uses roughly half the data of 1080p — check the table above to see the difference for your video’s length.
- Go audio-only for podcasts and talk shows. If you’re mostly listening, an MP3 is a tiny fraction of any video tier’s size — perfect for commutes and limited data.
- Check per-quality sizes in the downloader. SaveBili shows the available quality options for your link, so you can compare tiers and pick the sweet spot between size and sharpness.
- Download on Wi-Fi when you can. For long 1080p or 4K videos, queue them on Wi-Fi and watch offline later instead of burning mobile data.
Frequently asked questions
Why is this an estimate, not an exact size?
Bitrate isn’t fixed per quality tier — it varies with the codec (H.264 vs HEVC vs AV1), the video’s content complexity, and the uploader’s source. Two 10-minute 1080p videos can differ by hundreds of megabytes. The calculator uses conservative, widely plausible bitrate ranges so the true size usually lands inside the range shown.
Why is my 4K video bigger than the estimate?
4K bitrates vary the most of any tier — some uploads push well past 22 Mbps, and HDR or high-frame-rate content needs even more. Treat the 4K range as a floor rather than a ceiling for visually demanding videos.
Does audio-only (MP3) really save that much?
Yes. A typical 128–192 kbps MP3 is roughly 1 MB per minute, so a 10-minute audio-only download is around 10 MB — compared with an estimated 150–263 MB for 720p video. Great for music and talk content.
Will this tell me the exact size of my specific Bilibili video?
Not exactly — paste your link into the SaveBili downloader to see the real available qualities and their sizes for that video. This calculator is for planning before you download.
Have a Bilibili link ready? Get its real available sizes.
Check your video’s size in the downloader →Want to understand the quality tiers first? Read our guide on Bilibili video quality explained.
