APPENDIX B
Units of Measure
This appendix lists the units of measure and their abbreviations commonly used in meteorology. It also contains factors for converting from one unit of measure to another.
Temperature |
Unit of Measure | Abbreviation | Conversion Formulas |
|---|---|---|---|
| Degrees Fahrenheit Degrees Celsius (Formerly referred to as degrees centigrade) |
oF oC |
9/5 (oC) + 32 = 1.8 (oC) + 32 5/9 (oF - 32) = .556 (oF - 32) |
Length |
Metric | Abbreviation | US Equivalent |
|---|---|---|---|
| kilometer meter centimeter millimeter statute mile nautical mile yard foot inch |
km m cm mm mi naut mi yd ft in |
1,000 m = .62 mi 1,000 mm = 100 cm = 39.37 in 10 mm = .39 in .001 m = .04 in 5,280 ft 1.15 mi = 1,852 m .9144 m 30.48 cm 2.54 cm |
Velocity |
Unit of Measure | Abbreviation | Conversion |
|---|---|---|---|
| kilometers per hour meters per second nautical miles per hour statute miles per hour, or miles per hour feet per second |
kmph m/sec knots mph ft/sec |
1 knot = 1.84 kmph = 1.15 mph = .514 m/sec 1 mph = .447 m/sec = .87 knot |
Pressure |
Unit of Measure | Abbreviation |
|---|---|---|
| atmosphere pounds per square inch millibars inches of mercury centimeters of mercury kilopascal grams kilograms milligram-minutes per cubic meter |
atm psi mb in Hg cm Hg kP gm kg mg-min/m3 |
05-21-1996; 09:19:58
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