Orders of Magnitudes

All of them based on reviewable math, no averages based on sample data where a bias could be introduced or the worst case scenario forgotten.

notations

kb/Mb/Gb/Tb/…

SI prefixes (per-1000) for bits

kib/Mib/Gib/Tib/…

IEC prefixes (per-1024) for bits

kB/MB/GB/TB/…

SI prefixes (per-1000) for 8-bit bytes aka. octets

kiB/MiB/GiB/TiB/…

IEC prefixes (per-1024) for 8-bit bytes aka. octets

Audio bandwith

PCM, mono, CD Quality (16-bit @ 44.1 kHz), no compression

16 bit × 44100 Hz = 705600 bps = 705.6 kbps;
705600 bps × 60 seconds = 42336000 bits-per-minute = 42.336 Mb/minute

PCM, stereo, CD Quality (16-bit @ 44.1 kHz), no compression, 80 minutes (CD typical max duration)

16 bit × 44100 Hz × 80 minutes × 2 ch
= 705600 bits/second × 4800 seconds × 2ch
= 6773760000 bits/80-minutes = 6.77376 Gb/80-minutes
= 846720000 octets/80-minutes = 846.72 MB/80-minutes

Image filesizes

FullHD, True Color (24-bit), no compression, no color-indexing

(1920 × 1080 × 24 bit)/8 = 6220800 octets = 6.2208 MB. A file header of say 16 octets (4 octets each for: magic/signature, codec, height, width) being negligible at this magnitude.

Video

FullHD @ 60 Hz, True Color (24-bit), no compression, no color-indexing

(1920 × 1080 × 24 bit × 60 Hz)/8 = 373248000 bps = 373.248 Mbps

Power of 2

210 = 1024 B
220 = 1024 KiB
230 = 1024 MiB
240 = 1024 GiB
250 = 1024 TiB
260 = 1024 PiB