Metric Prefixes Table

Your guide to metric prefixes and conversion from yocto to yotta

`

Metric Prefixes are used for describing quantities of the International System of Units (SI) in a more concise manner.


Prefix

Symbol

Multiplier

Exponential

yotta

Y

1,000 000 000 000 000 000 000 000

1024

zetta

Z

1,000 000 000 000 000 000 000

1021

exa

E

1,000 000 000 000 000 000

1018

peta

P

1,000 000 000 000 000

1015

tera

T

1,000 000 000 000

1012

giga

G

1,000 000 000

109

mega

M

1,000 000

106

kilo

K

1,000

103

hecto

h

100

102

deca

da

10

101

1

100

deci

d

0.1

10-1

centi

c

0.01

10-2

milli

m

0.001

10-3

micro

µ

0.000 001

10-6

nano

n

0.000 000 001

10-9

pico

p

0.000 000 000 001

10-12

femto

f

0.000 000 000 000 001

10-15

atto

a

0.000 000 000 000 000 001

10-18

zepto

z

0.000 000 000 000 000 000 001

10-21

yocto

y

0.000 000 000 000 000 000 000 001

10-24

 
Metric Prefixes - The Scale of Things
The Scale of Things - Nanometers and More. (Source: Office of Science, U.S. Department of Energy) (click on image to enlarge)
 

Secret Worlds: The Universe Within


View the Milky Way at 10 million light years from the Earth. Then move through space towards the Earth in successive orders of magnitude until you reach a tall oak tree. After that, begin to move from the actual size of a leaf into a microscopic world that reveals leaf cell walls, the cell nucleus, chromatin, DNA and finally, into the subatomic universe of electrons and protons.

(Secret Worlds: The Universe Within. © Michael W. Davidson and The Florida State University)

Once the tutorial has completely downloaded, a set of the arrows will appear that allow the user to increase or decrease the view magnitude in Manual mode. Click on the Auto button to return to the Automatic mode.

Notice how each picture is actually an image of something that is 10 times bigger or smaller than the one preceding or following it. The number that appears on the lower right just below each image is the size of the object in the picture. On the lower left is the same number written in powers of ten, or exponential notation. Exponential notation is a convenient way for scientists to write very large or very small numbers.