Appendix F
Conversion Factors for Older and “British” Units
| Length | |
| in. | 25.4 mm |
| ft. | 0.3048 m |
| yd. | 0.9144 m |
| mile | 1.6093 km |
| Angstrom | 10−10 m |
| Time | |
| minute | 60 s |
| hour | 3.6 ks |
| day | 86.4 ks |
| year | 31.5 Ms |
| Area | |
| in.2 | 645.16 mm2 |
| ft.2 | 0.092903 m2 |
| yd.2 | 0.83613 m2 |
| acre | 4046.9 m2 |
| Volume | |
| in.3 | 16.387 cm3 |
| ft.3 | 0.02832 m3 |
| yd.3 | 0.76453 m3 |
| UK gal (Imperial) | 4546.1 cm3 |
| US gal | 3785.4 cm3 |
| liter | 10−3 m3 |
| Mass | |
| oz. | 28.352 g |
| lb. | 0.45359237 kg |
| cwt. | 50.8023 kg |
| ton | 1016.06 kg |
| tonne | 1000 kg |
| Force | |
| pdl | 0.13826 N |
| lbf | 4.4482 N |
| kgf | 9.8067 N |
| tonf | 9.9640 kN |
| dyne | 10−5 N |
| Temperature Difference | |
| °F (°R) | 5/9°C (°K) |
| Energy (Work/Heat) | |
| ft. lbf | 1.3558 J |
| ft. pdl | 0.04214 J |
| cal | 4.1868 J |
| erg | 10−7 J |
| BTU | 1.05506 kJ |
| CHU | 1.9004 kJ |
| hp h | 2.6845 MJ |
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