Appendix: Units Multimedia Engineering Thermodynamics US_to_SI SI_to_US
 Chapter 1. Basics 2. Pure Substances 3. First Law 4. Energy Analysis 5. Second Law 6. Entropy 7. Exergy Analysis 8. Gas Power Cyc 9. Brayton Cycle 10. Rankine Cycle Appendix Basic Math Units Thermo Tables Search eBooks Dynamics Statics Mechanics Fluids Thermodynamics Math Author(s): Meirong Huang Kurt Gramoll ©Kurt Gramoll

 US to SI Area 1 in2 = 645.2 mm2 1 ft2 = 144 in2 = 0.09290 m2 Acceleration 1 ft/s2 = 0.3048 m/s2 1 g = 32.17 ft/s2 = 9.807 m/s2   (average at earth's surface) Mass 1 slug = 14.59 kg Force 1 lb = 4.448 N 1 kip = 1000 lb = 4448 N 1 ton = 2000 lb = 8896 N Power 1 ft-lb/s = 1.356 W 1 hp = 550 ft-lb/s = 746 W Time 1 min = 60 s 1 hr = 60 min = 3600 s 1 day = 24 hr = 86,400 s Density 1 slug/ft3 = 515.4 kg/m3 Temperature TF = (9/5) TC + 32 TR = TF + 459.67 (Rankine) Pressure 1 lb/in2 (psi) = 144 lb/ft2 = 6895 Pa 1 lb/ft2 = 0.006944 lb/in2 = 47.88 Pa 1 ksi = 1,000 psi = 6,895 kPa = 6.895 MPa 1 msi = 1×106 psi = 6,895 MPa = 6.895 GPa 1 atm = 14.70 psi = 760 mmHg Length 1 ft = 12 in. = 0.3048 m 1 mi = 5280 ft = 1.609 km 1 nautical mile = 6076 ft = 1.852 km Volume 1 in3 = 16,390 mm3 =1.639×10-5 m3 1 ft3 = 0.02832 m3 1 gal = 3.7854 liter = 0.1337 ft3 Velocity 1 mi/hr = 1.467 ft/s = 1.609 km/hr = 0.4470 m/s 1 knot = 1 nautical mile/hr = 1.689 ft/s = 0.5144 m/s Work/Energy 1 ft-lb = 1.356 J = 1.356 N-m Angle 1 rad = 180/π deg = 57.30 deg 1 deg = π/180 rad = 0.01745 rad 1 rev = 2π rad = 360 deg 1 rev/min (rpm) = 0.1047 rad/s