# 单位换算

## 换算系数表

（H） 过去使用

### 长度

Å 1×10−10 m ≡ 0.1 nm

Barleycorn（H）   = ⅓ in（参见上面关于舍入的说明） ≈ 8.46×10-3 m

（英制）(cable length)   ≡ 608 ft ≈ 185.3184 m

fm ≡ 6 ft [4] = 1.8288 m

finger（长度单位）   ≡ 7/8 in = 0.022225 m
finger（长度单位）（服装）   ≡ 4½ in

= 0.1143 m

french; charriere F 13 mm = 0.3 ×10-3 m
fur ≡ 10 测链 = 660 ft = 220 yd [4] = 201.168 m
hand   ≡ 4 in [4] ≡ 0.1016 m

line ln ≡ 1/12 in [7] = 0.002116 m
link (Gunter's; Surveyor's) lnk ≡ 1/100 ch [4] ≡ 0.66 ft ≡ 7.92 in

= 0.201168 m
link (Ramsden's; Engineer's) lnk ≡ 1 ft [4] = 0.3048 m

≈ 赤道至南极点或北极点距离的110000000
≡ 1 m
mickey   1200 in = 1.27×10−4 m

nail（服装）   ≡ 2¼ in [4] = 0.057 15 m

pace   ≡ 2.5 ft [4]

= 0.762 m
plam   ≡ 3 in [4]

= 0.0762 m

（美英）[11][12] pt ≡ 1/72.272 in 0.000 351 450 m

1878年后:
≡ 5/133 cm
0.000 375 97 m;

1878年后:
0.000 375 939 85 m

quarter   ≡ ¼ yd

= 0.2286 m

Rope（H） rope ≡ 20 ft [4]

= 6.096 m
span（H）   ≡ 9 in [4]

= 0.2286 m
spat [14] ≡ 1×1012 m
stick（H）   ≡ 2 in = 0.0508 m
stigma; bicron (皮米) pm ≡ 1×10−12 m
(twip) twp 1/1440 in = 1.7638×10−5 m
x unit; siegbahn xu ≈ 1.0021×10−13 m [4]
（国际） yd ≡ 0.9144 m [5] ≡ 3 ft ≡ 36 in ≡ 0.9144 m

## 参考资料

1. ^ http://www.nature.com/news/the-astronomical-unit-gets-fixed-1.11416
2. ^ "NIST Reference on Constants, Units, and Uncertainty."(2006). National Institute of Standards and Technology. Retrieved February 22, 2008.
3. ^ 3.0 3.1 National Institute of Standards and Technology General Tables of Units of Measurement
4. ^ 4.00 4.01 4.02 4.03 4.04 4.05 4.06 4.07 4.08 4.09 4.10 4.11 4.12 4.13 Lide, D. (Ed.). (1990). Handbook of Chemistry and Physics (71st ed). Boca Raton, FL: CRC Press. Section 1.
5. ^ 5.0 5.1 National Bureau of Standards. (June 30, 1959). Refinement of values for the yard and the pound. Federal Register, viewed September 20, 2006 at National Geodetic Survey web site.
6. ^ The International Astronomical Union and Astronomical Units
7. ^ Klein, Herbert Arthur.(1988). The Science of Measurement: a Historical Survey. Mineola, NY: Dover Publications 0-4862-5839-4.
8. ^ 8.0 8.1 8.2 8.3 8.4 8.5 The International System of Units, Section 2.1 8, Bureau International des Poids et Mesures, 2006 [August 26, 2009]
9. ^ International System of Units, 8th ed. (2006), Bureau International des Poids et Mesures, Section 4.1 Table 8.
10. ^ P. Kenneth Seidelmann, Ed. (1992). Explanatory Supplement to the Astronomical Almanac. Sausalito, CA: University Science Books. p. 716 and s.v. parsec in Glossary.
11. ^ 11.0 11.1 11.2 Whitelaw, Ian. (2007). A Measure of All Things: The Story of Man and Measurement. New York: Macmillan 0-312-37026-1. p. 152.
12. ^ 12.0 12.1 De Vinne, Theodore Low (1900). The practice of typography: a treatise on the processes of type-making, the point system, the names, sizes, styles and prices of plain printing types 2nd ed. New York: The Century Co. p. 142–150.
13. ^ Pasko, Wesley Washington (1894). American dictionary of printing and bookmaking. (1894). New York: Howard Lockwood. p. 521.
14. ^ 14.0 14.1 14.2 14.3 14.4 14.5 Rowlett, Russ, How Many? A Dictionary of Units of Measurement, 2005
15. ^ Thompson, A. and Taylor, B.N. (2008). Guide for the Use of the International System of Units (SI). National Institute of Standards and Technology Special Publication 811. p. 57.
16. ^ 16.0 16.1 16.2 16.3 16.4
17. ^ Barry N. Taylor, Ed.,NIST Special Publication 330: The International System of Units (SI) (2001 Edition), Washington: US Government Printing Office, 43,"The 12th Conference Generale des Poids et Mesures (CGPM)…declares that the word “litre” may be employed as a special name for the cubic decimetre".
18. ^ CODATA Value: atomic uint of mass. (2006). National Institute of Standards and Technology. Retrieved 16 September 2008.
19. ^ The Swiss Federal Office for Metrology gives Zentner on a German language web page [1] and quintal on the English translation of that page [2]; the unit is marked "spécifiquement suisse !"
20. ^ 20.0 20.1 Pedersen O. (1983). "Glossary" in Coyne, G., Hoskin, M., and Pedersen, O. Gregorian Reform of the Calendar: Proceedings of the Vatican Conference to Commemorate its 400th Anniversary. Vatican Observatory. Available from Astrophysics Data System.
21. ^ Richards, E.G., Mapping Time, Oxford University Press, 94–95, 1998, ISBN 0-19-850413-6
22. ^ Steel, Duncan, Marking Time, John Wiley & Sons, 46, 2000, ISBN 0-471-29827-1
23. ^ Tom Benson. (2010.) "Mach Number" in Beginner's Guide to Aeronautics. NASA.
24. ^ CODATA Value: atomic unit of force. (2006). National Institute of Standards and Technology. Retrieved September 14, 2008.
25. ^ 25.0 25.1 25.2 25.3 25.4 25.5 25.6 25.7 25.8 Comité International des Poids et Mesures, Resolution 2, 1946 [August 26, 2009]
26. ^ 26.00 26.01 26.02 26.03 26.04 26.05 26.06 26.07 26.08 26.09 26.10 26.11 26.12 26.13 26.14 26.15 Barry N. Taylor, (April 1 995), Guide for the Use of the International System of Units (SI) (NIST Special Publication 811), Washington, DC: US Government Printing Office, pp. 57–68.
27. ^ Barry N. Taylor, (April 1995), Guide for the Use of the International System of Units (SI) (NIST Special Publication 811), Washington, DC: US Government Printing Office, p. 5.
28. ^ International System of Units, 8th ed. (2006), Bureau International des Poids et Mesures, Section 4.1 Table 7.
29. ^ The NIST Reference on Constants, Units, and Uncertainty, 2006 [August 26, 2009]
30. ^ Robert G. Mortimer Physical chemistry,Academic Press, 2000 ISBN 0-12-508345-9, page 677
31. ^ 31.0 31.1 31.2 NIST Guide to SI Units, Appendix B.9, [August 27, 2009]
32. ^ Standard for the Use of the International System of Units (SI): The Modern Metric System IEEE/ASTM SI 10-1997. (1997). New York and West Conshohocken, PA: Institute of Electrical and Electronics Engineers and American Society for Testing and Materials. Tables A.1 through A.5.
33. ^ The NIST Reference on Constants, Units, and Uncertainty, [August 28, 2009]
34. ^ Ambler Thompson & Barry N. Taylor. (2008). Guide for the Use of the International System of Units (SI). Special Publication 811. Gaithersburg, MD: National Institute of Standards and Technology. p. 10.
35. ^ 35.0 35.1 The International System of Units, Section 2.2.2., Table 3 8, Bureau International des Poids et Mesures, 2006 [August 27, 2009]
36. ^ The NIST Guide to the SI (Special Publication 811), section 5.2, 2008 [August 27, 2009]
37. ^ Ambler Thompson & Barry N. Taylor. (2008). Guide for the Use of the International System of Units (SI). Special Publication 811. Gaithersburg, MD: National Institute of Standards and Technology. p. 5.
38. ^ Comité international des poids et mesures, 2002, Recommendation 2, [August 27, 2009]
Notes