Symbol
Name
Long Scale
Short Scale
Decimal
1000m
10n
Notes
Y
Yotta
Quadrillion
Septillion
1,000,000,000,000,000,000,000,000
10008
Z
Zetta
Thousand Trillion
Sextillion
1,000,000,000,000,000,000,000
10007
1021
E
Exa
Trillion
Quintillion
1,000,000,000,000,000,000
10006
1018
P
Peta
Thousand Billion
Quadrillion
1,000,000,000,000,000
10005
1015
T
Tera
Billion
Trillion
1,000,000,000,000
10004
1012
G
Giga
Thousand Million
Billion
1,000,000,000
10003
109
gigameter = 1 billion meters (or 1,000,000Km)
M
Mega
Million
Million
1,000,000
10002
106
megameter = 1 million meters (or 10,000Km)
Symbol
Name
Long Scale
Short Scale
Decimal
1000m
10n
Notes
k
Kilo
Thousand
Thousand
1000
10001
103
1Km - 0.6214 miles
1km – 1,000 meters
h
Hecto
Hundred
Hundred
100
10002/3
102
d
Deca (deka)
Ten
Ten
10
10001/3
101
m
Meter
One
One
1
10000
100
d
Deci
One Tenth (1/10)
Tenth
0.1
1000−1/3
10−1
c
Centi
One Hundredth (1/100)
Hundredth
0.01
1000−2/3
10−2
m
Milli
One Thousandth (1/1000)
Thousandth
0.001
1000−1
10−3
1 Gram = 1000 Milligrams
µ
Micro
One Millionth
Millionth
0.000001
1000−2
10−6
n
Nano
One Thousand Millionth
Billionth
0.000000001
1000−3
10−9
Symbol
Name
Long Scale
Short Scale
Decimal
1000m
10n
Notes
P
Pico
One Billionth
Trillionth
0.000000000001
1000−4
10−12
F
Femto
One Thousand Billionth
Quadrillionth
0.000000000000001
1000−5
10−15
A
Atto
One Trillionth
Quintillionth
0.000000000000000001
1000−6
10−18
Z
Zepto
One Thousand Trillionth
Sextillionth
0.000000000000000000001
1000−7
10−21
Y
Yocto
One Quadrillionth
Septillionth
0.000000000000000000000001
1000−8
10−24
Å
Ångström
1.0 × 10-10 Meters
6990100000000000000
10 x 10-10
Length
Basic unit is the meter (m), which equals 39.37 in.
Common Multiples and Subdivisions
kilometer (km)
103 m
decimeter (dm)...