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 



25.4 





millimeters 





2.54 





centimeters 



square inches 



6.452 





square centimeters 



cubic inches 



16.39 





cubic centimeters 



feet 



30.48 





centimeters 





0.3048 





meters 



square feet 



0.0929 





square meters 



cubic feet 



0.0283 





cubic meters 



yards 



0.9144 





meters 



square yards 



0.836 





square meters 



cubic yards 



0.7646 





cubic meters 



miles 



1.6093 





kilometers 



square miles 



259.0 





hectares 



knots 



1.8532 





kilometers per hour 



acres 



0.4047 





hectares 



foot-pounds 



1.3558 





newton meters 



miUibars 



1.0197 X 10 3 



kilograms per square centimeter 



ounces 



28.35 





grams 



pounds 



453.6 





grams 





0.4536 





kilograms 



ton, long 



1.0160 





metric tons 



ton, short 



0.9072 





metric tons 



degrees (angle) 



0.1745 





radians 



Falirenheit degrees 



5/9 





Celsius degrees or Kelvins' 



' To obtain Celsius (C) temperature 



readings from Fahrenheit (F) readings, use formula: C = (5/9) (F - 32). 



To obtain Kelvin (K) readings, use 



formula: K = 



(5/9) (F- 



32) +273.15. 



