CONVERSION FACTORS, U.S. CUSTOMARY TO METRIC (SI) UNITS OF MEASUREMENT 



U.S. customary units of measurement used in this report can be converted to 

 metric (SI) units as follows: 



Multiply 



by 



To obtain 



inches 



square inches 

 cubic inches 



feet 



square feet 

 cubic feet 



yards 



square yards 

 cubic yards 



miles 



square miles 



knots 



acres 



foot-pounds 



millibars 



pounds 



ton, long 

 ton, short 

 degrees (angel) 

 Fahrenheit degrees 



25.4 



2.54 



6.452 

 16.39 



30.48 

 0.3048 

 0.0929 

 0.0283 



0.9144 



0.836 



0.7646 



1.6093 

 259.0 



1.852 



0.4047 



1.3558 



1.0197 X 10"3 



28.35 



453.6 

 0.4536 



1.0160 



0.9072 



0.01745 



5/9 



millimeters 

 centimeters 



square centimeters 



cubic centimeters 



centimeters 

 meters 



square meters 



cubic meters 



me t e r s 



square meters 

 cubic meters 



kilometers 

 hectares 



kilometers per hour 



hectares 



newton meters 



kilograms per square centimeter 



grams 



grams 

 kilograms 



metric tons 



metric tons 



radians 



Celsius degrees or Kelvins^ 



^To obtain Celsius (C) temperature readings 

 use formula: C = (5/9) (F -32). 



To obtain Kelvin (K) readings, use formula: 



from Fahrenheit (F) readings, 

 K = (5/9) (F -32) + 273.15. 



