Example: Video bitrate 3.14 Mbps (3,139 kbps). Change the values above to calculate your own.
About the Video Bitrate Calculator
Chat apps and forms cap file sizes, so you need to choose a bitrate that lands just under the limit. Enter the target size and the video's length, and use the result as the target bitrate in HandBrake, OBS, Premiere, DaVinci Resolve or FFmpeg.
Two-pass encoding hits the target most accurately. If the result is very low (under ~500 kbps for 720p), shorten the clip or lower the resolution, or the video will look blocky.
How to use the Video Bitrate Calculator
- Enter your numbers (or keep the example).
- The result updates instantly as you type.
- Copy the result, or copy the link: it keeps your numbers so you can share them.
Bitrate needed to fit a video under common size limits
| Length | 8 MB | 25 MB | 100 MB | 500 MB |
|---|---|---|---|---|
| 30 s | 1,963 kbps | 6,405 kbps | 26,005 kbps | 130,539 kbps |
| 1 min | 917 kbps | 3,139 kbps | 12,939 kbps | 65,205 kbps |
| 3 min | 220 kbps | 961 kbps | 4,228 kbps | 21,650 kbps |
| 10 min | – | 199 kbps | 1,179 kbps | 6,405 kbps |
| 30 min | – | – | 308 kbps | 2,050 kbps |
How it's calculated
Total bitrate = target size in bits × 0.98 ÷ duration in seconds. Video bitrate = total − audio bitrate. The 2% margin covers container overhead.
Features
- Instant resultsUpdates as you type.
- Shareable linkThe URL keeps your inputs.
- Reference tableCommon values on this page.
- Works offlineRuns in your browser.
Frequently asked questions
What bitrate fits a 1-minute video under 25 MB?
About 3.1 Mbps of video with 128 kbps audio.
Is the Video Bitrate Calculator free?
Yes, the Video Bitrate Calculator is free with no sign-up, no limits and no ads covering the result.
Does it work on my phone?
Yes. It works in any modern browser on phones, tablets and computers, and keeps working offline once the page has loaded.
Last updated · Processing happens locally in your browser.