TABLE OF CONTENTS The International System of Units ( Syst me International-SI) constitute the units of modern science and technology worldwide. US engineering and manufacturing in general, and the petroleum industry in particular, still use the so-called US Customary Units, which are by and large (but not always) based on the British Imperial Units. In this book we have tried to quote both units in most places. When quoting units from applications we typically use the units used in the country of origin. Listed below are definitions and conversion factors from US Customary to SI units.
| Length: | 1 meter (m) = 1,000 mm |
| 1 inch (in) = 25.4 mm | |
| 1 foot (ft) = 0.3048 m | |
| 1 mile (mi) = 5,280 ft =1.60934 km | |
| 1 nautical mile =1.852 km | |
| Mass: | 1 kilogram (kg) =1,000 g |
| 1 pound (lb) =1/2.20462 kg = 0.45359237 kg | |
| 1 metric tonne (t) =1,000 kg | |
| 1 ton (long) = 2,240 1b =1.0160469088 t | |
| Time: | 1 hour (h) = 60 minutes (min) = 3,600 seconds (s) |
| Temperature: | T F = 1.8T C + 32 |
| TK = T C + 273.15 | |
| Acceleration: | 1 foot/second 2 (ft/s 2) = 0.3048 m/s 2 |
| 1 inch/second 2 (in/s 2) = 0.0254 m/s 2 | |
| Density: | I lb/ft 3 =16.018463 kg/m 3 |
| Energy/Work: | 1 Joule (J) =1 Nm |
| 1 foot lbf (ft-lb) =1.355818 J | |
| 1 inch lbf (in-lb) = 0.112985 J | |
| 1 British thermal unit =1.05587 kJ | |
| Force: | l lbf = 4.4482 N |
| 1 Newton (N or kg m/s 2) = 1/9.8066... |
