Calculate video file size from bitrate, duration and audio track.
File size is bitrate multiplied by duration, independent of resolution except through the bitrate chosen. Newer codecs reduce size at equal quality but cost far more encoding time. Recording at a high bitrate is usually the right choice for editing, since compression can be applied at export but detail cannot be recovered.
Video File Size
Size = (video bitrate + audio bitrate) × duration ÷ 8, converted to bytes
Size = (video bitrate + audio bitrate) × duration ÷ 8, converted to bytes File size is bitrate multiplied by duration, independent of resolution except through the bitrate chosen. Newer codecs reduce size at equal quality but cost far more encoding time.
Recording at a high bitrate is usually the right choice for editing, since compression can be applied at export but detail cannot be recovered.
This calculator takes 4 inputs: Video bitrate, Audio bitrate, Duration, Saving from a newer codec. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.