Video file size calculator
See how big a video will be from its length and bitrate, or the bitrate you need to fit a size limit. Presets use YouTube's recommended upload bitrates.
Free, no sign-up·Runs in your browser·Bitrates checked October 5, 2026
How big is a minute of video?
File sizes at YouTube's recommended upload bitrates, with 384 kbps stereo audio added. Sizes use decimal units (1 GB = 1,000 MB).
| Resolution | Frame rate | YouTube bitrate | Per minute | Per hour |
|---|---|---|---|---|
| 8K | 24–30 fps | 80–160 Mbps | 603 MB–1,203 MB | 36.2 GB–72.2 GB |
| 8K | 48–60 fps | 120–240 Mbps | 903 MB–1,803 MB | 54.2 GB–108.2 GB |
| 2160p (4K) | 24–30 fps | 35–45 Mbps | 265 MB–340 MB | 15.9 GB–20.4 GB |
| 2160p (4K) | 48–60 fps | 53–68 Mbps | 400 MB–513 MB | 24.0 GB–30.8 GB |
| 1440p (2K) | 24–30 fps | 16 Mbps | 123 MB | 7.4 GB |
| 1440p (2K) | 48–60 fps | 24 Mbps | 183 MB | 11.0 GB |
| 1080p | 24–30 fps | 8 Mbps | 63 MB | 3.8 GB |
| 1080p | 48–60 fps | 12 Mbps | 93 MB | 5.6 GB |
| 720p | 24–30 fps | 5 Mbps | 40 MB | 2.4 GB |
| 720p | 48–60 fps | 7.5 Mbps | 59 MB | 3.5 GB |
| 480p | 24–30 fps | 2.5 Mbps | 22 MB | 1.3 GB |
| 480p | 48–60 fps | 4 Mbps | 33 MB | 2.0 GB |
| 360p | 24–30 fps | 1 Mbps | 10 MB | 0.6 GB |
| 360p | 48–60 fps | 1.5 Mbps | 14 MB | 0.8 GB |
| Resolution | Frame rate | YouTube bitrate | Per minute | Per hour |
|---|---|---|---|---|
| 8K | 24–30 fps | 100–200 Mbps | 753 MB–1,503 MB | 45.2 GB–90.2 GB |
| 8K | 48–60 fps | 150–300 Mbps | 1,128 MB–2,253 MB | 67.7 GB–135.2 GB |
| 2160p (4K) | 24–30 fps | 44–56 Mbps | 333 MB–423 MB | 20.0 GB–25.4 GB |
| 2160p (4K) | 48–60 fps | 66–85 Mbps | 498 MB–640 MB | 29.9 GB–38.4 GB |
| 1440p (2K) | 24–30 fps | 20 Mbps | 153 MB | 9.2 GB |
| 1440p (2K) | 48–60 fps | 30 Mbps | 228 MB | 13.7 GB |
| 1080p | 24–30 fps | 10 Mbps | 78 MB | 4.7 GB |
| 1080p | 48–60 fps | 15 Mbps | 115 MB | 6.9 GB |
| 720p | 24–30 fps | 6.5 Mbps | 52 MB | 3.1 GB |
| 720p | 48–60 fps | 9.5 Mbps | 74 MB | 4.4 GB |
Bitrates: YouTube Help, Recommended upload encoding settings, checked October 5, 2026. YouTube also recommends an MP4 container, H.264 video and AAC-LC or Opus audio.
How to calculate video file size
File size (MB) = (video bitrate + audio bitrate in Mbps) × length in seconds ÷ 8. Bitrates are in bits; dividing by 8 turns bits into bytes. A 10-minute 1080p video at 8 Mbps with 0.384 Mbps audio is 8.384 × 600 ÷ 8 = 629 MB.
To go the other way, for a size limit such as an email attachment, a client's upload portal or a free storage tier, divide the size by the length: bitrate (Mbps) = size (MB) × 8 ÷ seconds, then subtract the audio bitrate to get the most your video can use.
YouTube's upload limits
The largest file YouTube accepts is 256 GB or 12 hours, whichever is less. By default you can upload videos up to 15 minutes long; longer uploads need a verified account (YouTube Help). At YouTube's recommended bitrates, uploads up to 1440p, and 4K SDR at 24–30 fps, reach the 12-hour cap first. 4K at 48–60 fps, 4K HDR and 8K can reach 256 GB sooner: at 68 Mbps that happens after about 8 hours 20 minutes.
Why your export won't match exactly
Most encoders use a variable bitrate: the number you set is an average, so a busy scene takes more and a static one less. Quality-based modes such as CRF don't aim at a bitrate at all, and the container adds a little overhead. Use the calculator for planning storage and upload time, then check the real file.
Questions
How big is a 10-minute 1080p video?
At YouTube’s recommended 8 Mbps for 1080p at 24–30 fps, plus 384 kbps stereo audio, about 629 MB. At 48–60 fps (12 Mbps) it is about 929 MB.
How do I calculate video file size?
Add the video and audio bitrates, multiply by the length in seconds, and divide by 8 to turn bits into bytes. Size in MB = (video Mbps + audio Mbps) × seconds ÷ 8. Ten minutes at 8 Mbps video and 0.384 Mbps audio is 8.384 × 600 ÷ 8 = 629 MB.
What bitrate should I use for a YouTube upload?
YouTube recommends 8 Mbps for 1080p at 24–30 fps and 12 Mbps at 48–60 fps, 35–45 Mbps for 4K at 24–30 fps and 53–68 Mbps at 48–60 fps, with H.264 video in an MP4 and AAC-LC or Opus audio. The full table is on this page.
What is the largest file YouTube accepts?
256 GB or 12 hours, whichever is less. Videos longer than 15 minutes also need a verified Google account.
Why is my exported file a different size from the calculator?
Most encoders use a variable bitrate, so the number you set is an average and the real file lands above or below it. Quality-based modes such as CRF don’t target a bitrate at all. Containers also add a little overhead.
Does the calculator use MB or MiB?
Decimal units: 1 MB is 1,000,000 bytes and 1 GB is 1,000 MB, the way macOS Finder and most cloud storage count. Windows File Explorer counts in units of 1,024, so the same file shows about 7% smaller in GB there.
Rather hand off the edit?
Mark Studios edits, exports and delivers to spec for YouTube, ads and podcasts, and you work directly with Mark.
More free tools: YouTube thumbnail checker·Free YouTube channel audit·All tools