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 
inches 25.4 
2.54 
square inches 6.452 
cubic inches 16.39 
feet 30.48 
0.3048 
square feet 0.0929 
cubic feet 0.0283 
yards 0.9144 
square yards 0.836 
cubic yards 0.7646 
miles 1.6093 
square miles 259.0 
knots 1.852 
acres 0.4047 
foot-pounds 1.3558 
millibars TONS Texans 
ounces 28.35 
pounds 453.6 
0.4536 
ton, long 1.0160 
ton, short 0.9072 
degrees (angle) 0.01745 
Fahrenheit degrees 5/9 
eo 
To obtain 
ee 
millimeters 
centimeters 
square centimeters 
cubic centimeters 
centimeters 
meters 
square meters 
cubic meters 
meters 
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! 
TTT eee 
lTo obtain Celsius (C) temperature readings from Fahrenheit (F) readings, 
use formula: 
To obtain Kelvin (K) readings, use formula: 
(5/9) (F -32). 
K = (5/9) (F -32) + 273.15. 
