YouTube Video File Size and Bitrates: A Practical Guide
YouTube video file size and bitrates: recommended bitrates from 360p to 4K, the 256 GB and 12-hour upload limits, and when a bigger file is actually worth it.
File size is decided by three numbers: resolution, frame rate and bitrate. Duration multiplies the result. Once those are clear the arithmetic becomes boring, which is the point.
How to calculate video file size
size in MB = (total bitrate in Mbps × duration in seconds) ÷ 8
That is the whole calculation. A 10-minute 1080p video at 12 Mbps total is about 900 MB; at 6 Mbps it is 450 MB. Nothing else changes the answer. The video size calculator runs it for any combination of resolution, frame rate and duration.
Recommended upload bitrates
These are YouTube's recommendations for standard dynamic range uploads, not limits:
| Resolution | 24–30 fps | 48–60 fps |
|---|---|---|
| 2160p (4K) | 35–45 Mbps | 53–68 Mbps |
| 1440p (2K) | 16 Mbps | 24 Mbps |
| 1080p | 8 Mbps | 12 Mbps |
| 720p | 5 Mbps | 7.5 Mbps |
| 480p | 2.5 Mbps | 4 Mbps |
| 360p | 1 Mbps | 1.5 Mbps |
HDR adds roughly 10–25% on top of these figures, and YouTube supports HDR up to 4K at 60 fps.
Upload limits
| Limit | Value |
|---|---|
| Maximum file size | 256 GB |
| Maximum duration, verified channel | 12 hours |
| Default duration limit | 15 minutes until the channel is verified |
| Files over 20 GB | Require an up-to-date browser |
| Accepted container | MP4 is the safe choice; MOV works for high bitrates |
Whichever limit you hit first applies. A verified 12-hour upload is also a 256 GB ceiling.
Content matters more than resolution
These numbers assume difficult footage: fast motion, fine texture, lots of detail. Real-world exceptions are common.
- Screen recordings and slides: 2–4 Mbps at 1080p is usually indistinguishable from 8 Mbps.
- Talking head in a static room: 4–6 Mbps is plenty at 1080p.
- Dark, grainy footage: noise is expensive. A lower bitrate looks worse than the number suggests.
Frame rate is not linear
Going from 30 to 60 fps does not double the file size. Most of the frame is unchanged between frames, so the recommended bitrate rises by roughly 50%, not 100%. It is worth it for fast motion and game capture, and pointless for static talking-head video.
Vertical video
1080 × 1920 has exactly the same pixel count as 1920 × 1080, so the same bitrate guidance applies. Only the shape changes, and the shape is what matters for Shorts: composition, safe zones and the frame you choose as the cover. See Shorts cover size and safe zones.
Before you export
- Estimate the size for your settings in the calculator.
- If it lands far above your bandwidth or storage budget, lower the bitrate before lowering the resolution — re-encoding down a resolution is a second generation of loss.
- For a 20-minute video at 1080p, budget render time as well as upload time; both scale with file size.
- Export audio as AAC at 128–192 kbps. Beyond that, the video encoder is the limit, not the audio.
