# Celsius

## Temperature can be measured in a unit called Celsius, also known as centigrade.

Celsius is measured in degrees and symbolized with °C Some common measurements:

-The freezing point of water, which is 0 °C

-The boiling point of water, which is 100 °C

However, it is important to note that the measurement can be affected by water composition and air pressure.

Its for this reason that the ocean water, which contains a high salt content, will freeze at below 0 °C, and boiling water on top of Mount Everest, at a very high altitude will reduce its boiling point to below 100 °C.

Conversion to Fahrenheit 0°C = 32°F

It is very easy to convert a temperature in Celsius(°C) to a temperature in Fahrenheit (°F) In order to do this we much multiply our temperature in Celsius by 9/5, and then add 32:

°F = °C × 9/5 + 32

Example We will do a conversion of 30 degrees Celsius to degrees Fahrenheit:

°F = 30°C × 9/5 + 32

°F = 54 + 32

°F = 86

Conversion to Kelvin 0°C = 273.15 K

A temperature in Kelvin (K) can be easily converted from a temperature in Celsius (°C).

To do this we must simply add 273.15 to our Celsius (°C) measurement

K = °C + 273.15

Example We will do a conversion of 30 degrees Celsius to Kelvin:

K = 30°C + 273.15

K= 303.15

Conversion to Rankine 0°C = 491.67°R   A temperature in Rankine (°R) can be easily converted from a temperature in Celsius (°C).

To do this we must simply add 273.15 to our Celsius (°C) measurement, and then multiply by 9/5

°R = °C + 273.15 x 9/5

Example We will do a conversion of 30 degrees Celsius to degrees Rankine:

°R = (30°C + 273.15) × 9/5

°R = 303.15 x 9/5

°R = 545.67

Celsius table

 Celsius (°C) Fahrenheit (°F) Rankine (°R) Kelvin (K) Temperature -25 °C -13°F 446.67 °R 248.15 K Very cold winter day 0 °C 32.0 °F 491.67 °R 273.15 K Water freezing point 21 °C 69.8 °F 529.47 °R 294.15 K Room temperature 37 °C 98.6 °F 558.27 °R 310.15 K Normal body temperature 100 °C 212.0 °F 671.67 °R 373.15 K Water boiling point