Units Conversion Tables
Table 1: Multiples and S ubmultiples of SI units
Prefix Symbol
Multiplying Factor
exa
E 10
18
1 000 000 000 000 000 000
peta P 10
15
1 000 000 000 000 000
tera T 10
12
1 000 000 000 000
giga G 10
9
1 000 000 000
mega
M 10
6
1 000 000
kilo k 10
3
1 000
hecto* h 10
2
100
deca* da
10 10
deci* d 10
-1
0.1
centi
c
10
-2
0.01
milli
m
10
-3
0.001
micro
u
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
* these prefixes are not normally used
Table 2: Length Uni ts
Millimeters Centimeters Meters Kilometers Inches Feet Yards Miles
mm cm m km in ft yd mi
1 0.1 0.001 0.000001 0.03937 0.003281 0.001094 6.21e-07
10 1 0.01 0.00001 0.393701 0.032808 0.010936 0.000006
1000 100 1 0.001 39.37008 3.28084 1.093613 0.000621
1000000 100000 1000 1 39370.08 3280.84 1093.613 0.621371
25.4 2.54 0.0254 0.000025 1 0.083333 0.027778 0.000016
304.8 30.48 0.3048 0.000305 12 1 0.333333 0.000189
914.4 91.44 0.9144 0.000914 36 3 1 0.000568
1609344 160934.4 1609.344 1.609344 63360 5280 1760 1
Table 3: Area Units
Millimeter
square
Centimeter
square
Meter
square
Inch
square
Foot
square
Yard
square
mm
2
cm
2
m
2
in
2
ft
2
yd
2
1 0.01 0.000001 0.00155 0.000011 0.000001
100 1 0.0001 0.155 0.001076 0.00012
1000000 10000 1 1550.003 10.76391 1.19599
645.16 6.4516 0.000645 1 0.006944 0.000772
92903 929.0304 0.092903 144 1 0.111111
836127 8361.274 0.836127 1296 9 1
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