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Metric to Standard Conversions
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APPROXIMATE CONVERSIONS FROM
SI / METRIC UNITS
TO
STANDARD / US CUSTOMARY UNITS
SYMBOL WHEN YOU KNOW MULTIPLY BY TO FIND SYMBOL
LENGTH

mm millimeters 0.039 inches in
m meters 3.28 feet ft
m meters 1.09 yards yd
km kilometers 0.621 miles mi
AREA

mm2 millimeters 0.0016 square inches in2
m2 square meters 10.764 square feet ft2
m2 square meters 1.195 square yards yd2
ha hectares 2.47 acres ac
km2 square kilometers 0.386 square miles mi2
VOLUME

mL milliliters 0.034 fluid ounces fl oz
L liters 0.264 gallons gal
m3 cubic meters 35.314 cubic feet ft3
m3 cubic meters 1.307 cubic yards yd3
g grams 0.035 ounces oz
kg kilograms 2.202 pounds lb
Mg (or "t") megagrams
(or "metric ton")
1.103 short tons (2000 lb) T
TEMPERATURE

oC Celsius 1.8C + 32 Fahrenheit oF
ILLUMINATION

lx lux 0.0929 foot-candles fc
cd/m2 candela/m2 0.2919 foot-Lamberts fl
FORCE and PRESSURE or STRESS

N newtons 0.225 poundforce lbf
kPa kilopascals 0.145 poundforce per square inch lbf/in2

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Unit Categories
  • Acceleration
        m/s2, g (Earth Gravity) ...
  • Angle
        Degrees, Minutes, Radian ...
  • Angular Acceleration
        Degree/s2, Revolution/minute2 ...
  • Angular Velocity
        Degree/second, Revolution/minute (rpm) ...
  • Area
        m2, acres, hectares ...
  • Density
        Cubic centimetre/gram, Pound/foot3 ...
  • Dynamic Viscosity
        Centipoise, Kilogram/metre second ...
  • Energy
        Btus, Ergs, Horsepower hours ...
  • Force
        Kilogram force, Kilonewton ...
  • Fuel Consumption (US)
        Mile/Gallon, Liter/100 Kilometer ...
  • Kinematic Viscosity
        Centistokes, Square millimetre/second ...
  • Length
        km, feet, yards ...
  • Linear Velocity
        Centimetre/second, Speed of light ...
  • Mass Flow
        Gram/hour, Tonne/day ...
  • Power
        Btu per hour, Dyne-centimeter per second ...
  • Pressure
        Atmosphere, Bar, Pascal ...
  • Temperature
        Celsius, Fahrenheit ...
  • Time
        Day, Minute, Week ...
  • Volume
        cm3, litres ...
  • Volume Flow
        Barrel (oil)/s, Gallons/hour ...
  • Weight
        Drams, Micrograms, Stones ...


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