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 

 2.54 







millimeters 

 centimeters 



square inches 



6.452 







square centimeters 



cubic inches 



16.39 







cubic centimeters 



feet 



30.48 

 0.3048 







centimeters 

 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 

 0.4536 







grams 

 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) 



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



To obtain Kelvin (K) readings, 



use formula: K = 



^(5/9)(F- 



•32) 



1+273.15. 



