Video bitrate calculator
Calculate exact size budgets and video bitrate with named scenarios, audio, overhead, MB/MiB and supplied encoder limits.
A QUICK WALKTHROUGH
How to use this tool
- Enter named scenarios, duration and size or total bitrate; set audio, overhead, units and optional limits; calculate and export the fixed report.
Model and scope
Size mode uses floor(size×unit) bytes; total kbps = budget×8/(seconds×1000×(1+overhead/100)); video = total−audio. Bitrate mode uses total×1000×seconds/8×(1+overhead/100), rounded upward to file bytes. Zero duration leaves the inverse undefined; the forward size is zero. Limits are user constraints, never encoder predictions.
Result
Original decimal strings become exact fractions. Display decimals stop after 12 places (…); all byte boundaries use exact integer rounding.
How to use
Enter named scenarios, duration and size or total bitrate; set audio, overhead, units and optional limits; calculate and export the fixed report.
GOOD TO KNOW
Common questions
Does this predict an actual encoded file?
No. Codec, resolution and encoder behavior are outside this arithmetic model. All processing is local; no media file is read or uploaded.