Appendix B: Conversion Factors

 

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Length:                         1 inch = 2.54 cm

                                    1 m = 39.4 in = 3.28 ft = 100 cm

                                    1 mile = 1.61 km

                                    1 km = 1000 m

 

Mass:                           1 kg = 1000 grams

                                    1 slug = 14.6 kg

 

Speed:                          1 mi/h = 1.47 ft/sec = 0.447 m/sec

 

Force:                          1 lb = 4.45 N

                                    1 N = 0.225 lb = 100,000 dyne

 

Energy:                         1 Joule = 0.738 ft C lb

                                    1 calorie = 4.19 Joule

 

Power:                         1 Watt = 0.738 ft C lb/sec

                                    1 horsepower = 550 ft C lb/sec = 745.7 Watt

 

Angular Measure:         1 rad = 57.3 deg = 0.159 rev

                                    2B rad = 360 deg = 1 rev

 

Volume:                        1 cm3 = 1 milliliter (ml)

                                    1000 ml = 1000 cm3 = 1 liter

                                    1 m3 = 35.3 ft3

                                    1 ft3 = 1728 in3

                                    1 gallon = 231 in3

 

Density:                        1 gram/cm3 = 1000 kg/m3

                                    1000 kg/m3 = “62.4 lb/ft3"

 

Pressure:                      1 N/m2 = 1 Pascal = 0.021 lb/ft2

                                    1 lb/in2 = 1 psi = 144 lb/ft2

                                    1 Atmosphere = 76 cm - Hg = 100,000 N/m2 = 14.7 lb/in2