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 



ounces 



pounds 



ton, long 

 ton, short 

 degrees (angle) 

 Fahrenheit degrees 



25.4 



millimeters 



2.54 



centimeters 



6.452 



square centimeters 



16.39 



cubic centimeters 



30.48 



centimeters 



0.3048 



meters 



0.0929 



square meters 



0.0283 



cubic meters 



0.9144 



meters 



0.836 



square meters 



0.7646 



cubic meters 



1.6093 



kilometers 



259.0 



hectares 



1.852 



kilometers per hour 



0.4047 



hectares 



1.3558 



newton meters 



1.0197 x 10" 3 



kilograms per square centim 



28.35 



grams 



453.6 



grams 



0.4536 



kilograms 



1.0160 



metric tons 



0.9072 



metric tons 



0.01745 



radians 



5/9 



Celsius degrees or Kelvins 1 



*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. 



