✳ FREE CALCULATOR
Video bitrate calculator
Work backwards from a file size limit to the bitrate you need to encode at, with the audio track budgeted separately.
- Total bitrate budget
- 13,981 kbps
- Video bitrate to set
- 13,853 kbps
- Video bitrate in Mbps
- 13.85 Mbps
- Audio takes
- 938 KB
Calculated as: video kbps = (target MB × 1048576 × 8 ÷ seconds ÷ 1000) − audio kbps
What this assumes
- Encoding to an exact size needs two-pass or capped VBR; a single-pass encode at this bitrate will land close, not exact.
- Leave a few percent of headroom if the limit is a hard rejection threshold.
Koldflux works these numbers out for you when it exports - the calculators exist because our own pipeline needed them first.
Automate this in Koldflux