Kelvin Scale
The Kelvin (K) is a unit increment of temperature, and is one of the seven SI base units. It is a thermodynamic (absolute) temperature scale where Absolute Zero (the theoretical absence of all thermal energy) is zero (0 K).
Celsius Scale
Celsius ( C) is a temperature scale named after the astronomer Anders Celsius (1701-1744), who developed a similar temperature scale two years before his death. It is also known as centigrade. A degree Celsius can refer to a specific temperature on the Celsius scale, and can also serve as a unit increment to indicate a temperature interval (which is a difference between two temperatures or an uncertainty).
Fahrenheit Scale
Fahrenheit ( F) is a temperature scale named after the physicist Daniel Gabriel Fahrenheit (1686-1736), who proposed it in 1724.
Rankine Scale
Rankine (R or Ra to distinguish it from the R mer and R aumur scales) is a temperature scale named after the physicist William John Macquorn Rankine (1820-1872), who proposed it in 1859. The Rankine scale is similar to the Kelvin scale in that zero is Absolute Zero; however, a degree Rankine is defined as equal to one degree Fahrenheit as opposed to one degree Celsius (as used by the Kelvin scale). A temperature of -459.67 F is equal to 0 R.
| | Kelvin | Celsius | Fahrenheit | Rankine |
|---|
| Absolute Zero (by definition) | 0 K | -273.15 C | -459.67 F | 0 R |
| Freezing Point of Water [1] | 273.15 K | 0 C | 32 F | 491.67 R |
| Triple Point of Water [by definition] | 273.16 K | 0.01 C | 32.018 F | 491.688 R |
| Boiling Point of Water | 373.1339 K | 99.9839 C | 211.9710 F | 671.641 R |
Conversion Formulas
- Celsius From Kelvin: [ C] = [K] - 273.15
- Kelvin from Celsius: [K] = [ C] + 273.15
- Fahrenheit from Kelvin: [ F] = [K] 9/5 - 459.67
- Kelvin from Fahrenheit: [K] = ([ F] + 459.67) 5/9
- Fahrenheit from Celsius: [F] = [C] 9/5 + 32
- Celsius from Fahrenheit: [C] = ([F] - 32) 5/9
- Rankine from Kelvin: [ R] = [K] 9/5
- Kelvin from Rankine: [K] = [ R] 5/9
Calculating Wind Chill
Wind Chill = 35.74 + 0.6215(T) - 35.75((V)^0.16) + 0.4275(T)((V)^0.16)
- T is the air temperature in degrees Fahrenheit ( F)
- V is the wind speed in Miles Per Hour (MPH)