CONVERSION FACTORS: U.S. CUSTOMARY TO METRIC
(SI) UNITS OF MEASUREMENT
These conversion factors include all the significant digits given in the
conversion tables in the ASTM Metric Practice Guide (E 380), which
has been approved for use by the Department of Defense. Converted
values should be rounded to have the same precision as the original
(see E 380).
Multiply
By
To obtain
inch
25.4
millimeter
foot
0.3048
meter
foot3
meter3
0.02831865
mile
1609.347
meter
mile2
meter2
2,589,998
foot3/second (cfs)
meter3/second
0.0004719474
foot-pound
1.335818
newton-meter
pound
4.448222
newton
pound/inch2 (psi)
6894.757
pascal
Btu/lbm
2326.000
joule/kilogram
Btu/lbm F
4186.800
joule/kilogram kelvin
Btu/ft3 F
joule/meter3 kelvin
67,066
Btu/ft3
joule/meter3
37,259
degrees Fahrenheit
tC = (tF 32)/1.8
degrees Celsius
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