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 liour 





acres 



0.4047 



hectares 





foot-pounds 



1.3558 



newton meters 





millibars 



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 





Fahrenheit degrc^es 



5/9 



(Celsius degrees or Kelvins' 





To olilaiii C-olsiiisi (('.) tcnipt^ralure 

 To ohUiiii Kelvin (K) ri'a(jiii";s, u>ic 



readings from Falirf-nlii^il (V) rcadiiif^s, use rorniula: C -- (")/<>) (!•' .12). 

 formula: K = (5/9) (V - ;J2) + 27.!. I .'>. 



