Measurement & Units

 

Prefix for the International System of measurements and units (SI)

 

Name

Symbol

Unit multiplication factor

yotta

Y

1024 = 1 000 000 000 000 000 000 000 000

zetta

Z

1021 = 1 000 000 000 000 000 000 000

exa

E

1018 = 1 000 000 000 000 000 000

peta

P

1015 = 1 000 000 000 000 000

tera

T

1012 = 1 000 000 000 000

giga

G

109 = 1 000 000 000

mega

M

106 = 1 000 000

quilo

k

10³ = 1 000

hecto

h

10² = 100

deca

da

10

deci

d

10-1 = 0.1

centi

c

10-2 = 0.01

mili

m

10-3 = 0.001

micro

µ

10-6 = 0.000 001

nano

n

10-9 = 0.000 000 001

pico

p

10-12 = 0.000 000 000 001

femto

f

10-15 = 0.000 000 000 000 001

atto

a

10-18 = 0.000 000 000 000 000 001

zepto

z

10-21 = 0.000 000 000 000 000 000 001

yocto

y

10-24 = 0.000 000 000 000 000 000 000 001

Source: INMETRO (Brazil)

 

 

Length Conversion Factors

 

1 meter = 39.37 inches = 3.281 feet

1 sea mile = 1852 meters

1 land mile = 1609 meters

1 inche = 2.54 cm

1 foot = 30.47 cm

 

Temperature Conversion Factors

 

Kelvin degree (K) = 273.1 + Celsius degree

Fahrenheit degree = 32 + (9/5) Celsius degree

 

 

 

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