# Common Units Converter, meteric <--> imperial

°F <--> °C

### Temperature conversion

is equivalent to:

Formula:

### Length/Distance conversion

is equivalent to:

Formula:

### Area conversion

is equivalent to:

Formula:

### Volume conversion

is equivalent to:

Formula:

### Weight conversion

is equivalent to:

Formula:

### Pressure conversion

is equivalent to:

Formula:

### Power conversion

British System:
``` 746W = 1 H.P.
1000W (1 kW) = (1000 / 746) H.P. = 1.34 H.P.
```

Metric System:
``` 735.5W = 1 H.P.
1000W (1kW) = (1000/735.5) H.P. = 1.36 H.P.
```

### Speed conversion

Speed is expressed in length per time. However there are some special units:

• Speed of light in vacuum= 1079252848.8 kilometer/hour = 299792458 meter/second
• Speed of sound in air [mach]= 1225.044 kilometer/hour = 340.29 meter/second
• 1 knot = 1.852 kilometer/hour = 0.514 meter/second
• 1 mile/hour (mph) = 1.609344 kilometer/hour (km/h), use above length converter for mile and kilometer

### Special names

Some old units in the metric system use old names that do not have the power prefixes. Those are:
• 1 millibar = 1hpa (hectopascal)
• Liter: 1l = 1dm3 (cubic decimeter)
• Tonn: 1t = 1000kg
• 1 are = 100 square meter = 100m2, 1 hectare=10,000m2=0.01km2

### Power prefixes used within the units of the metric system

No converter is needed to convert among the units of the metric system. You just multiply or divide by a factor which is given by the power prefix.
Example: 1km (kilometer) = 103 m (meter)= 1000m (meter)

Prefix

Symbol

Factor

yotta

Y

1024

zetta

Z

1021

exa

E

1018

peta

P

1015

tera

T

1012

giga

G

109

mega

M

106=1,000,000

kilo

k

103=1000

hecto

h

102=100

deka

da

101=10

deci

d

10-1=1/10

centi

c

10-2=1/100

milli

m

10-3=1/1000

micro

μ (mu)

10-6=1/1,000,000

nano

n

10-9

pico

p

10-12

femto

f

10-15

atto

a

10-18

zepto

z

10-21

yocto

y

10-24

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© Guido Socher, License: GPL, guidosocher at gmail.com, This software is provided without warrenty of any kind.
Version: 2010-08-15