To Convert Into Metric
To Convert Out of Metric
If You Know
Multiply By
To Get
Length
2.54
centimeters
0.3937
feet
30.48
0.0328
0.3048
meters
3.281
yards
0.9144
1.0936
miles
1.60934
kilometers
0.6214
Area
6.4516
square centimeters
0.155
square feet
0.092903
square meters
10.7639
square yards
0.8361
1.196
acres
0.40469
hectares
2.471
square miles
2.58999
square kilometers
0.3861
Volume
29.574
milliliters
0.0338
gallons
3.7854
liters
0.26417
cubic feet
0.028317
cubic meters
35.315
cubic yards
0.76455
1.308
Weight
28.3495
grams
0.03527
pounds
0.45360
kilograms
2.2046
short tons
0.90718
metric tons
1.1023
Force
0.00001
newtons
100,000
Temperature
Subtract 32, then multiply by 5/9ths
Celsius
Multiply by 9/5ths, then add 32
Prefix
Symbol
Multiplication Factor
exa-
E
peta-
P
tera-
T
giga-
G
mega-
M
kilo-
k
hecto-
h
deka-
da
deci-
d
centi-
c
milli-
m
micro-
nano-
n
pico-
p
femto-
f
a