Page 17 - Thomson, William Tyrrell-Theory of Vibration with Applications-Taylor _ Francis (2010)

The SI System of Units

CONVERSION FACTORS* U.S.-BRITISH UNITS TO SI UNITS (continued)
To Convert From To Multiply By
Mass:
pound • mass (Ibm) kilogram (kg) 4.5359 X 10-'
slug (Ibf • s^/ft) kilogram (kg) 1.4594 X 10
ton (2000 Ibm) kilogram (kg) 9.0718 X 10^
Power:
foot-pound/minute (ft • Ibf/min) watt (W) 2.2597 X 10-2
horsepower (550 ft • Ibf/s) watt (W) 7.4570 X 102
Pressure, stress:
atmosphere (std) (14.7 Ibf/in.^) newton/meter^ (N/m^ or Pa) 1.0133 X 10^
pound/foot^ (Ibf/ft^) newton/meter^ (N/m^ or Pa) 4.7880 X 10
pound/inch^ (Ib f/in .o r psi) newton/meter^ (N/m^ or Pa) 6.8948 X 10^
Velocity:
foot/minute (ft/min) meter/second (m/s) 5.08 X 10-2*
foot/second (ft/s) meter/second (m/s) 3.048 X 10-'*
knot (nautical mi/h) meter/second (m/s) 5.1444 X 10-'
mile/hour (mi/h) meter/second (m/s) 4.4704 X 10-'*
mile/hour (mi/h) kilometer/hour (km/h) 1.6093
mile/second (mi/s) kilometer/second (km/s) 1.6093
Volume:
foot‘d (ft^) meter(m'^) 2.8317 X 10-2
inch^ (in.'^) meter(m'^) 1.6387 X 10-2
* Exact value.
Source: J. L. Meriam, Dynamics, 2nd Ed. (SI Version) (New York: John Wiley, 1975).
The International System of Units (SI), July 1974, National Bureau of Standards, Special Publication
330.