Video storage duration calculator
Bitrate, not resolution alone, determines how quickly video fills storage.
GB
Mbit/s
%
Recording time
5.12hours
- Recording time
- 307.2 minutes
- Recording time
- 18 432 seconds
Show the working
- Storage capacity = 128
- Video bitrate = 50
- Reserved space = 10
- usable_megabits = 128*8000*(1-10/100) = 921 600
- Recording time = 921 600/50 = 18 432
- Recording time = 18 432/60 = 307.2
- Recording time = 307.2/60 = 5.12
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
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The formula
- seconds = usable storage in megabits / bitrate in megabits per second
Variable-bitrate recording can use more or less space than its nominal average.