| Abbreviation |
Name |
Origin |
Value |
|
Y
| Yotta
| ital. otto = eight | (103)8 = 1024
| | 1 000 000 000 000 000 000 000 000
| European quadrillion (long scale)
American septillion (short scale)
|
|
Z
| Zetta
| ital. sette = seven
| (103)7 = 1021
| | 1 000 000 000 000 000 000 000
| European trilliard (long scale)
American sextillion (short scale)
|
|
E
| Exa
| gr. εξάκις, hexákis = six times
| (103)6 = 1018
| | 1 000 000 000 000 000 000
| European trillion (long scale)
American quintillion (short scale)
|
|
P
| Peta
| gr. πεντάκις, pentákis = five times
| (103)5 = 1015
| | 1 000 000 000 000 000
| European billiard (long scale)
American quadrillion (short scale)
|
|
T
| Tera
| gr. τέρας, téras = monstrous / tetrákis = four times
| (103)4 = 1012
| | 1 000 000 000 000
| European billion (long scale)
American trillion (short scale)
|
|
G
| Giga
| gr. γίγας, gígas = Giant
| (103)3 = 109
| | 1 000 000 000
| European milliard (long scale)
American billion (short scale)
|
|
M
| Mega
| gr. μέγας, mégas = large
| (103)2 = 106
| | 1 000 000
| Million
|
|
k
| Kilo
| gr. χίλιοι, chílioi = a thousand
| 103
| | 1 000
| one thousand
|
|
h
| Hekto
| gr. εκατόν, hekatón = a hundred
| 102
| | 100
| one hundred
|
|
da
| Deka
| gr. δέκα, déka = ten
| 101
| | 10
| ten
|
|
| –
|
| 100
| | 1
| one
|
|
d
| Dezi
| lat. decimus = tenth
| 10-1
| | 0,1
| one tenth
|
|
c
| Zenti
| lat. centesimus = hundredth
| 10-2
| | 0,01
| one hundreth
|
|
m
| Milli
| lat. millesimus = thousandth
| 10-3
| | 0,001
| one thousandth
|
|
μ
| Mikro
| gr. μικρός, mikrós = snakk
| (10-3)2 = 10-6
| | 0,000 001
| one millionth
|
|
n
| Nano
| gr. νάνος, nános und ital. nano = dwarf
| (10-3)3 = 10-9
| | 0,000 000 001
| one European milliardth (American billionth)
|
|
p
| Piko
| ital. piccolo = small
| (10-3)4 = 10-12
| | 0,000 000 000 001
| one European billionth (American trillionth)
|
|
f
| Femto
| skand. femton = fifteen
| (10-3)5 = 10-15
| | 0,000 000 000 000 001
| one european biiliardth (American quadrillionth)
|
|
a
| Atto
| skand. arton = eighteen
| (10-3)6 = 10-18
| | 0,000 000 000 000 000 001
| one European trillionth (American quintillionth)
|
|
z
| Zepto
| lat. septem = seven
| (10-3)7 = 10-21
| | 0,000 000 000 000 000 000 001
| one European trilliardth (American sextillionth)
|
|
y
| Yokto
| lat. octo = egith
| (10-3)8 = 10-24
| | 0,000 000 000 000 000 000 000 001
| one European quadrillionth (American septillionth)
|
