Video Bitrate Calculator
Works backwards from the file size you need to the bitrate to encode at.
Video bitrate
— Mbit/s
Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
Total with audio — Mbit/s
Bits per pixel —
Reading this —
The formula
video bitrate = size × 8 ÷ length − audio bitrate bits per pixel = video bitrate ÷ (width × height × frame rate)
Bits per pixel lets you compare bitrates across resolutions.
What to watch out for
Two-pass encoding lands closest to a target size. Leave a little margin if the limit is hard.
Frequently Asked Questions
What bitrate fits an hour into 4 GB?
8.70 Mbit/s of video, with 192 kbit/s of audio.