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@unitsconverter
Worldwide
use of the Metric System and Date of Metrication
* The United States of America,
Burma and Liberia have not yet adopted the Metric System (SI).
|
Conversion
Table
|
U.S. unit |
Metric equivalent |
|
Metric unit |
U.S. equivalent |
|
Inch (in) |
|
Centimeter (cm) |
|
|
2.54 centimeters |
|
0.394 inch |
|
|
|
|
1.61 kilometer |
|
0.621 mile |
|
|
Square inch (in2) |
|
Square centimeter (cm2) |
|
|
6.45 square centimeters
(cm2) |
|
0.155 square inch
(in2) |
|
|
Square foot (ft2) |
|
Square meter (m2) |
|
|
0.093 square meter
(m2) |
|
10.8 square feet
(ft2) |
|
|
Square yard (yd2) |
|
Square meter (m2) |
|
|
0.836 square meter
(m2) |
|
1.2 square yard
(yd2) |
|
|
Square mile (mi2) |
|
Square kilometer (km2) |
|
|
2.56 square kilometers
(km2) |
|
0.386 square mile
(mi2) |
|
|
Cubic foot (ft3) |
|
Cubic meter (m3) |
|
|
0.028 cubic meter
(m3) |
|
35.28 cubic feet
(ft3) |
|
|
|
|
231 cubic inches
(in3) |
|
0.0043 gallon |
|
|
|
|
0.454 kilogram |
|
2.2 pounds |
|
|
Units per conversion type
Area
- square meter (m2)
- are (a) = 100 sq. meters (m2)
- hectare (ha) = 100 Ares = 10 000 sq.
meters
- square kilometer (km2) = 100
hectares = 10000 Ares = 1 000 000 sq. meters
- square mega meter (Mm2) = 1 000
000 000 000 sq. meters
- square foot = 144 sq. inches = 0.09290304
sq. meters
- square yard = 9 sq. feet = 0.83612736 sq.
meters
- square perch = 30.25 sq. yards =
25.2928526 sq. meters
- acre = 10 sq. chains = one furlong by one
chain = 160 sq. perches = 4840 sq. yards = 43 560 sq. feet =
4046.8564224 sq. meters
- square mile = 640 acres = 2.589988110336
sq. kilometers
|
|
Metric System |
Imperial |
| 1 square centimeter [cm2] |
100 square millimeters |
0.001076391 square feet |
| 1 square
meter [m2] |
10000
square centimeters |
1.19599004630 square yard |
| 1 hectare
[ha] |
10000
square meters |
2.47105381467 acres |
| 1 square
kilometer [km2] |
100
hectares |
0.38610215854 square mile |
|
Imperial |
Metric System |
| 1 square inch [in2] |
6.4516 square centimeters |
| 1 square
foot [ft2] |
144
square inches |
0.09290303999 square meter |
| 1 square
yard [yd2] |
9 square
feet |
0.83612736 square meter |
| 1 acre |
4840
square yards |
4046.8564224 square meters |
| 1 square
mile
|
640 acres |
2.589988110336 square kilometers |
Length
Main length units:
- meter
- centimeter
- kilometer
- inch
- foot
- yard
- mile
- light-year (astronomical unit)
- parsec (astronomical unit)
- angstrom
(microscopic unit)
|
|
Metric System |
Imperial |
| 1 millimeter [mm] |
0.03937007874 inch |
| 1
centimeter [cm] |
10
millimeters |
0.3937007874 inch |
| 1 meter
[m] |
100
centimeters |
1.09361329833 yard |
| 1
kilometer [km] |
1000
meters |
0.62137119223 mile |
|
Imperial |
Metric System |
| 1 inch [in] |
2.54 centimeters |
| 1 foot
[ft] |
12 inches |
0.3048
meter |
| 1 yard
[yd] |
3 feet |
0.9144
meter |
| 1 mile |
1760
yards |
1.609344
kilometer |
|
Weight and Mass
Main weight units:
- gram (g) =
1⁄1000
kg
- kilogram (kg)
- tonne (t)= 1 000 kg
- electronvolt
(eV)
- atomic mass unit (u)
- slug (sl)
- pound (lb)
- Planck mass (mP)
- solar mass (M⊙)
- Compton wavelength
- Schwarzschild radius
|
|
Metric System |
Imperial |
| 1 milligram [mg] |
0.01543209876 grain |
| 1 gram
[g] |
1000
milligrams |
0.03527399072 ounce |
| 1
kilogram [kg] |
1000
grams |
2.20458553791 pounds |
| 1 tonne
[t] |
1000
kilograms |
0.98418997228 ton |
|
Imperial |
Metric System |
| 1 ounce [oz] |
437.4922839506173 grains |
28.3495 grams |
| 1 pound
[lb] |
16 ounces |
0.4536
kilogram |
| 1 stone |
14 pounds |
6.35
kilograms |
| 1
hundredweight [cwt] |
112
pounds |
50.8032
kilograms |
| 1 ton
|
20
hundredweights |
1.016064
tonne |
|
Volume
Main volume units:
-
cubic inch
(cu in) or (in3)
-
cubic foot
(cu ft) or (ft3)
-
cubic yard
(cu yd) or (yd3)
-
acre foot
(acre ft)
-
minim
(min)
-
US fluid dram
(fl dr)
-
teaspoon
(tsp)
-
tablespoon
(Tbsp)
-
US fluid ounce
(fl oz)
-
jigger
(jig)
-
US gill
(gi)
-
US cup
(cp)
|
-
US pint
(pt)
-
US quart
(qt)
-
US gallon
(gal)
-
barrel
(bbl)
-
hogshead
-
pint
(pt)
-
quart
(qt)
-
gallon
(gal)
-
peck
(pk)
-
bushel
(bu)
-
fluid ounce
(fl oz)
-
gill
|
|
|
Metric System |
Imperial |
| 1 cubic centimeter [cm3] |
0.06102361003 cubic inch |
| 1 cubic
decimeter [dm3] |
1000
cubic centimeters |
0.03531458914 cubic foot |
| 1 cubic
meter [m3] |
1000
cubic decimeters |
1.30794774594 cubic yard |
| 1 liter
[l] |
1 cubic
decimeter |
1.75975011548 pint |
| 1
hectoliter [hl] |
100
liters |
21.9968764435 gallons |
|
Imperial |
Metric System |
| 1 cubic inch [in3] |
16.3871 cubic centimeters |
| 1 cubic
foot [ft3] |
1728
cubic inch |
0.0283169088 cubic meter |
| 1 fluid
ounce [fl oz] |
28.413125
milliliters |
| 1 pint
[pt] |
20 fluid
ounces |
0.5682625
liter |
| 1 gallon
[gal] |
8 pints |
4.5461
liters |
|
Energy
Main energy units:
- ergs
- calories
- joule
- kilowatt hour = 3.6 million joules
- British thermal unit (BTU) = 1055 joules
(approx.)
|
|
Flow rate
|
Definition: volume of fluid passing through a
particular surface per unit time (i.e.: cubic meters per minute or cubic
feet per minute).
Symbol: Q.
Also know as:
- volumetric flow rate
- volume flow rate
- rate of fluid flow
|
|
Force
Force units:
- Newton
- dyne
- kilogram-force
- pound-force
- poundal
|
|
Power
Main power units:
- watt (W) = 1 joule per second
- ergs per second (erg/s)
- horsepower (hp) = 33 000 foot-pounds per
minute = 746 watts
- metric horsepower [Pferdestärke
(PS) or cheval vapeur (CV)]
- foot-pounds per minute
- dBm
- calories per hour
- kilocalories per hour
- Btu per hour (Btu/h)
- tons of refrigeration = 12 000 Btu/h
|
|
Pressure
Main pressure units:
- Pascal
(Pa) = one Newton
per square meter
- pound per square inch (psi)
- bar
- barye (ba) = dyne per square
centimeter
- hectoPascal (hPa)
- kiloPascal (kPa)
- millibar
(mbar)
- inch of mercury (inHg)
- decibar (dbar)
= increase of 1 meter (depth)
- rule of thumb (for scuba divers)
- standard
atmosphere (atm) = 101 325 Pa = 101.325 kPa = 1013.25 hPa
|
- millimeters of mercury (mmHg)
= one torr
- inches of mercury
- millimeter, centimeter,
meter, inch and foot of water
- kip, ton-force (short),
ton-force (long), pound-force, ounce-force and poundal per
square inch
- kg-force, or kilopond, per
square cm
- gram-force and tonne-force
(metric ton-force per square cm
- kg-force and tonne-force per
square meter
- sthene per square meter (pieze)
|
|
|
Temperature
Main temperature units:
- Kelvin (K)
- Celsius
- Fahrenheit
- electronvolts
(eV)= 11 605 K
- kiloelectronvolts (keV)
- Rankine
|
|
Velocity
Main velocity units:
- Meters per second (m s−1 or
m/s)
- Kilometers per hour (km/h)
- Miles per hour (mph)
- Knots (nautical miles per hour [kn or kt])
- Feet per second (fps or ft/s)
- Mach number = speed divided by the speed
of sound
- Speed of light in vacuum (c = 299
792 458 m/s)
|
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Contact
|
Privacy Policy
Conversion tables and results shown on this website are for
information purposes only.
Robert Radford, M.A. (Quebec, Canada) © MMXXII
All rights reserved.
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