Units
04-18-2021 · 1 minute read · 174 words

Name Notation Power of 10 Value
kilobyte kB $(10^3)^1 = 10^{3}$ 1,000 bytes
megabyte MB $(10^3)^2 = 10^{6}$ 1,000,000 bytes
gigabyte GB $(10^3)^3 = 10^{9}$ 1,000,000,000 bytes
terabyte TB $(10^3)^4 = 10^{12}$ 1,000,000,000 bytes
petabyte PB $(10^3)^5 = 10^{15}$ 1,000,000,000,000,000 bytes

In kibi - think of the bi as “binary”

Ex:

1000 * 1000 * 8 = 8,000,000 (base 10)
1024 * 1024 * 8 = 8,388,608 (base 2)


The units below are more “precise” since they use base 2

Name Notation Power of 2 Value
kibibyte KiB $(2^{10})^1 = 2^{10}$ $1024^{1}$ = 1024 bytes
mebibyte MiB $(2^{10})^2 = 2^{20}$ $1024^{2}$ = 1,048,576 bytes
gibibyte GiB $(2^{10})^3 = 2^{30}$ $1024^{3}$ = 1,073,741,824 bytes
tebibyte TiB $(2^{10})^4 = 2^{40}$ $1024^{4}$ = 109,951,162,776 bytes

### Powers of 10

Powers of 10 Standard Form Fractional Form Place Value
$10^{4}$ 10,000 $10,000\over1$ ten thousands
$10^{3}$ 1000 $1,000\over1$ thousands
$10^{2}$ 100 $100\over1$ hundreds
$10^{2}$ 10 $10\over1$ tens
$10^{0}$ 1 $1\over1$ ones
$10^{-1}$ 0.1 $1\over10$ tenths
$10^{-2}$ 0.01 $1\over100$ hundredths
$10^{-3}$ 0.001 $1\over1,000$ thousands
$10^{-4}$ 0.0001 $1\over10,000$ ten thousands

### Availability

tb,Tb

units   kilobyte   megabyte   gigabyte   terabyte   kibibyte   mebibyte   gibibyte   tebibyte