  Metric Conversion         Convert between metric and English units using a metric conversion table. This page features tables for converting between metric system units and corresponding English units commonly used in the United States. Here you will find convenient conversion
tables for length, area, volume, weight, pressure, energy, and temperature units. Conversion table calculations show approximately three (3) significant figures.
Length ConversionMetric length units include the meter, the kilometer (1,000 meters), the decimeter (0.1 meters),
the centimeter (0.01 meters), the millimeter (0.001 meters), the micron (0.000001 meters), the nanometer (0.000000001 or 1e9
meters), and the angstrom (0.0000000001 or 1e10 meters). British and American length units include the foot, the yard
(3 feet), the furlong (660 feet), the mile (5,280 feet), the league (15,840 feet), and the inch (1/12th foot). Length Conversion Table 

Metric Units  English Units 

Kilometers  Meters  Millimeters  Inches  Feet  Yards  Miles  1  1,000  1,000,000  39,370  3,281  1,094  0.6214  0.001  1  1,000  39.37  3.281  1.094  0.0006214  0.000001  0.001  1  0.03937  0.003281  0.001094  6.214e7   0.0000254  0.0254  25.4  1  0.08333  0.02778  0.00001578  0.0003048  0.3048  304.8  12  1  0.3333  0.0001894  0.0009144  0.9144  914.4  36  3  1  0.0005682  1.609  1,609  1,609,000  63,360  5,280  1,760  1 
Length
Unit Conversion Calculator 

Kilometers  Meters  Millimeters  Inches  Feet  Yards  Miles         
See also Metric Distance Unit Conversions.
Area ConversionMetric area units include the are and the hectare (100 ares). One square kilometer is equivalent to 100 hectares. The area unit commonly
used in the USA is the acre (4840 square yards). One square mile is equivalent to 640 acres. Area Conversion Table 

Metric Units  English Units 

Square Kilometers  Hectares  Ares  Square Yards  Acres  Square
Miles  1  100  10,000  1,196,000  247.1  000.386  0.01  1  100  11,960  2.471  0.00386  0.0001  0.01  1  119.6  0.02471  0.0000386   8.361e7  0.00008361  0.008361  1  0.0002066  3.228e7  0.004047  0.4047  40.47  4,840  1  0.0015625  2.59  259  25,900  3,097,600  640  1 
Area
Unit Conversion Calculator 

Square Kilometers  Hectares  Ares  Square Yards  Acres  Square Miles        
See
also Metric Area Unit Conversions. Volume ConversionMetric volume units include the liter, the decaliter (10 liters), the hectoliter (100 liters),
the deciliter (0.1 liters), the centiliter (0.01 liters), the milliliter (0.001 liters), and the microliter (0.000001 liters.
A liter is equivalent to 1 cubic decimeter. Liquid measure units commonly used in the USA include the fluid ounce, the pint (16 fluid ounces), the quart (32 fluid ounces), the gallon
(128 fluid ounces), and the petroleum barrel (5376 fluid ounces). A gallon is equivalent to 231 cubic inches. Volume Conversion Table (Liquid
Measure) 

Metric Units  U.S. Liquid Measure Units 

Liters  Milliliters  Fluid Ounces  Quarts  Gallons  1  1,000  33.81  1.057  0.2642  0.001  1  0.03381  0.001057  0.0002642   0.02957  29.57  1  0.03125  0.007813  0.9464  946.4  32  1  0.25  3.785  3785  128  4  1 
Liquid
Volume Unit Conversion Calculator 

Liters  Milliliters  Fluid Ounces  Quarts  Gallons       
Dry measure units commonly used in the USA include the bushel,
the peck (0.25 bushels), the gallon (0.125 bushels), the quart (0.03125 bushels), the pint (0.01562 bushels), and the gill
(0.003906 bushels). A bushel is equivalent to 2150 cubic inches. Volume Conversion Table (Dry Measure) 

Metric Units  U.S. Dry Measure Units 

Liters  Milliliters  Quarts  Pecks  Bushels  1  1,000  0.9081  0.1135  0.02838  0.001  1  0.0009081  0.0001135  0.00002838   1.101  1101  1  0.125  0.03125  8.81  8810  8  1  0.25  35.24  35,240  32  4  1 
Dry Volume
Unit Conversion Calculator 

Liters  Milliliters  Quarts  Pecks  Bushels       
See also Metric Volume Unit Conversions.
Weight ConversionMetric weight units include the gram, the kilogram (1,000 grams), the tonne (1,000,000 grams),
the carat (0.2 grams), the centigram (0.01 grams), the milligram (0.001 grams), and the microgram (0.000001 grams). Avoirdupois
weight units commonly used in the USA include the pound, the stone (14 pounds), the short hundredweight (100 pounds), the
short ton (2,000 pounds), the ounce (1/16th pound), the dram (1/256th pound), and the grain (1/7000th pound). Weight Conversion Table 

Metric Units  Avoirdupois Units 

Tonnes  Kilograms  Grams  Ounces  Pounds  Short Tons  1  1,000  1,000,000  35,270  2,205  1.102  0.001  1  1,000  35.27  2.205  0.001102  0.000001  0.001  1  0.03527  0.002205  1.102e6   0.00002835  0.02835  28.35  1  0.0625  0.00003125  0.0004536  0.4536  453.6  16  1  0.0005  0.0004536  907.2  907,200  32,000  2,000  1 
Weight
Unit Conversion Calculator 

Tonnes  Kilograms  Grams  Ounces  Pounds  Short Tons        
Metric "weight" units are, more correctly, known
as "mass" units. See also Metric Mass Unit Conversions.
Pressure ConversionMetric pressure units include the bar, the millibar (0.001 bars), and the pascal (0.00001
bars). One bar is equivalent to 10,200 kilograms per square meter. The pressure units commonly used in the USA include
the inch of mercury and the atmosphere (29.92 inches of mercury). One atmosphere is equivalent to 14.7 pounds per square
inch. Pressure
Conversion Table 

Metric Units  English Units 

Bars  Millibars  Pascals  Inches of Mercury  Atmospheres  1  1,000  100,000  29.53  0.9869  0.001  1  100  0.02953  0.0009869  0.00001  0.01  1  0.0002953  0.000009869   0.03386  33.86  3,386  1  0.03342  1.013  1,013  101,300  29.92  1 
Pressure
Unit Conversion Calculator 

Bars  Millibars  Pascals  Inches of Mercury  Atmospheres       
See also Metric Pressure Unit Conversions.
Energy ConversionMetric energy units include the joule, the kilojoule (1000 joules), and the megajoule (1000000
joules). The energy units commonly used in the USA include the calorie and the British Thermal Unit (BTU). A calorie
is commonly defined as the amount of heat energy required to raise the temperature of one gram of water by one degree Celsius.
However, the energy needed for this task depends on the water's starting temperature. The thermochemical calorie is
defined as exactly 4.184 joules, but several other, slightly different definitions exist as well. One calorie is equivalent
to 3.088 footpounds; one BTU is equivalent to 252 calories. Using this latter definition, one calorie is equal to 4.187
joules. Energy
Conversion Table 

Metric Units  English Units 

Joules  Calories  BTUs  1  0.2388  0.0009478   4.187  1  0.003968  1055  252  1 
Energy
Unit Conversion Calculator 

Joules  Calories  BTUs     
See also Metric Energy Unit Conversions.
Temperature ConversionMetric temperature units include degrees Celsius and degrees Kelvin (degrees Celsius plus
273.1). At sea level, the freezing temperature of water is 0 degrees Celsius and the boiling point of water is 100 degrees
Celsius. The temperature unit commonly used in the USA is Fahrenheit. At sea level, the freezing temperature of water
is 32 degrees Fahrenheit and the boiling point of water is 212 degrees Fahrenheit. Temperature Conversion Table 

Metric
Units  English Units 

Celsius  Kelvin  Fahrenheit  273.1  0  459.7  50  223.1  58  40  233.1  40  30  243.1  22  20  253.1  4  10  263.1  14  0  273.1  32  10  283.1  50  20  293.1  68  30  303.1  86  40  313.1  104  50  323.1  122  100  373.1  212 
See also Metric Temperature Unit Conversions. Other Metric Conversion Sites NIST Metric Information and Conversions
Find a wealth of educational and reference resources about the metric system and its implementation, as well as metric
conversion tables and calculators.  The United States and the Metric System
The United States is now the only industrialized country in the world that does not use the metric system as its primary
system of measurement. Learn the history of the metric system and how the United States has been involved with this system
since the early 19th century.
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