------------------ --------------- ----------- ------------- --------------- --------------- ----- ------------
  **SI\* (MODERN                                                                                     
  METRIC) CONVERSION                                                                                 
  FACTORS**                                                                                          

  **APPROXIMATE                                                                                      
  CONVERSIONS TO SI                                                                                  
  UNITS**                                                                                            

  **Symbol**         **When You                  **Multiply    **To Find**                           **Symbol**
                     Know**                      By**                                                

  **LENGTH**                                                                                         

  in                 inches                      25.4          millimeters                           mm

  ft                 feet                        0.305         meters                                m

  yd                 yards                       0.914         meters                                m

  mi                 miles                       1.61          kilometers                            km

  **AREA**                                                                                           

  in^2^              square inches               645.2         square                                mm^2^
                                                               millimeters                           

  ft^2^              square feet                 0.093         square meters                         m^2^

  yd^2^              square yard                 0.836         square meters                         m^2^

  ac                 acres                       0.405         hectares                              ha

  mi^2^              square miles                2.59          square                                km^2^
                                                               kilometers                            

  **VOLUME**                                                                                         

  fl oz              fluid ounces                29.57         milliliters                           mL

  gal                gallons                     3.785         liters                                L

  ft^3^              cubic feet                  0.028         cubic meters                          m^3^

  yd^3^              cubic yards                 0.765         cubic meters                          m^3^

  NOTE: volumes                                                                                      
  greater than 1000                                                                                  
  L shall be shown                                                                                   
  in m^3^                                                                                            

  **MASS**                                                                                           

  oz                 ounces                      28.35         grams                                 g

  lb                 pounds                      0.454         kilograms                             kg

  T                  short tons                  0.907         megagrams (or                         Mg (or
                     (2000 lb)                                 \"metric ton\")                       \"t\")

  **TEMPERATURE                                                                                      
  (exact degrees)**                                                                                  

  °F                 Fahrenheit                  5 (F-32)/9    Celsius                               °C

                                                 or (F-32)/1.8                                       

  **ILLUMINATION**                                                                                   

  fc                 foot-candles                10.76         lux                                   lx

  fl                 foot-Lamberts               3.426         candela/m^2^                          cd/m^2^

  **FORCE and                                                                                        
  PRESSURE or                                                                                        
  STRESS**                                                                                           

  lbf                poundforce                  4.45          newtons                               N

  lbf/in^2^          poundforce per              6.89          kilopascals                           kPa
                     square inch                                                                     

  **APPROXIMATE                                                                                      
  CONVERSIONS FROM                                                                                   
  SI UNITS**                                                                                         

  **Symbol**         **When You                  **Multiply    **To Find**                           **Symbol**
                     Know**                      By**                                                

  **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**                                                                                           

  mm^2^              square                      0.0016        square inches                         in^2^
                     millimeters                                                                     

  m^2^               square meters               10.764        square feet                           ft^2^

  m^2^               square meters               1.195         square yards                          yd^2^

  ha                 hectares                    2.47          acres                                 ac

  km^2^              square                      0.386         square miles                          mi^2^
                     kilometers                                                                      

  **VOLUME**                                                                                         

  mL                 milliliters                 0.034         fluid ounces                          fl oz

  L                  liters                      0.264         gallons                               gal

  m^3^               cubic meters                35.314        cubic feet                            ft^3^

  m^3^               cubic meters                1.307         cubic yards                           yd^3^

  **MASS**                                                                                           

  g                  grams                       0.035         ounces                                oz

  kg                 kilograms                   2.202         pounds                                lb

  Mg (or \"t\")      megagrams (or               1.103         short tons                            T
                     \"metric ton\")                           (2000 lb)                             

  **TEMPERATURE                                                                                      
  (exact degrees)**                                                                                  

  °C                 Celsius                     1.8C+32       Fahrenheit                            °F

  **ILLUMINATION**                                                                                   

  lx                 lux                         0.0929        foot-candles                          fc

  cd/m^2^            candela/m^2^                0.2919        foot-Lamberts                         fl

  **FORCE and                                                                                        
  PRESSURE or                                                                                        
  STRESS**                                                                                           

  N                  newtons                     0.225         poundforce                            lbf

  kPa                kilopascals                 0.145         poundforce per                        lbf/in^2^
                                                               square inch                           
  ------------------ --------------- ----------- ------------- --------------- --------------- ----- ------------

> \*SI is the symbol for the International System of Units. Appropriate
> rounding should be made to comply with Section 4 of ASTM E380.
>
> (Revised March 2003)