The process of transferring the value of temperature from one unit to another is known as temperature conversion. Scroll down to learn about temperature conversion formulas. Temperature is measured using scales such as Kelvin, Celsius, and Fahrenheit, among others. Water’s freezing and boiling points are 273.15K and 373.15K, respectively, on the Kelvin scale. Water’s freezing and boiling points are 32°F and 212°F, respectively, on the Fahrenheit scale. The freezing and boiling points of water are 0°C and 100°C, respectively, on the Celsius scale.

There are three major temperature conversions that can occur:

  • Between Celsius and Kelvin
  • Between Fahrenheit and Kelvin
  • Between Celsius and Fahrenheit.

What is Temperature Conversion Formulas?

Temperature conversion formulas are formulas for converting the value of temperature from one unit to another. There are numerous temperature conversion methods. The most generally used temperature scales are Kelvin, Celsius, and Fahrenheit. The temperature conversion formulas are described below:

  • Celsius to Kelvin: K = C + 273.15.
  • Kelvin to Celsius: C = K – 273.15.
  • Fahrenheit to Celsius: C = (F-32) (5/9)
  • Celsius to Fahrenheit: F = C(9/5) + 32
  • Fahrenheit to Kelvin: K = (F-32) (5/9) + 273.15
  • Kelvin to Fahrenheit: F = (K-273.15) (9/5) + 32

Pressure Conversion table

Temperature Units

Temperature can be measured or recorded in various units such as Kelvin, Celsius, and Fahrenheit. Temperature is measured in three separate units: Celsius (°C), Fahrenheit (°F), and Kelvin (K).

The SI unit of temperature measurement is Kelvin, but Fahrenheit and Celsius are commonly used scales.

Celsius

The Celsius scale was named after Swedish astronomer Anders Celsius, who invented it in 1742. Celsius, commonly known as centigrade, is based on the freezing point of water (0°) and the boiling point of water (100°). The temperature in Celsius is denoted by °C. A human body’s average temperature is 37°C.

Fahrenheit

The Fahrenheit scale is a temperature scale named after Daniel Gabriel Fahrenheit, who invented it. The boiling temperature of the water on this scale is 212° F, and the freezing point is 32° F. The temperature in Fahrenheit is denoted by the symbol °F. The average body temperature is 98.6°F.

Kelvin

The SI temperature unit is Kelvin. K is the unit symbol. It bears the name of physicist William Thomson, 1st Baron Kelvin (1824–1907). Unlike in Celsius or Fahrenheit, the degree symbol ° is not used to represent temperature here.

Temperature Conversion Formulas between Celsius and Kelvin

The following formulas are used to convert temperatures between Celsius and Kelvin:

  • The Celsius to Kelvin temperature conversion formula is: K = C + 273.15
  • C = K 273.15 is the temperature conversion formula from Kelvin to Celsius.

Example: Convert 15 °C into Kelvin.

Solution:

C = 15°C

K= C + 273.15

= 15+273.15

=288.15 K

So, we could say that, 15°C is equivalent to 288.15 K.

Temperature Conversion Formulas between Fahrenheit and Celsius

The following formulas are used to convert temperatures between Fahrenheit and Celsius:

  • The Fahrenheit to Celsius temperature conversion formula is: C = (F – 32) 5/9
  • F = C(9/5) + 32 is the temperature conversion formula from Celsius to Fahrenheit.

Example: Convert 120°F on the Celsius scale

Solution:

F= 120°F (Given)

C= (F – 32) 5/9

= (120-32) 5/9

=88* 5/9

=440/9

=48.88C

So, we could say that 120 °F is equivalent to 48.88°C

Temperature Conversion Formulas between Fahrenheit and Kelvin

The following formulas are used to convert temperatures between Fahrenheit and Kelvin:

The following is the temperature conversion formula from Fahrenheit to Kelvin:

K = (F − 32) × 5/9 + 273.15

The Kelvin to Fahrenheit temperature conversion formula is:

F = (K – 273.15) × 9/5 + 32

Example: Convert 150 degrees Fahrenheit to Kelvin.

Solution: F = 150 F(Given).

K = (F − 32) × 5/9 + 273.15

=(150 − 32) × 5/9 + 273.15

=118 × 5/9 + 273.15

=590/9 + 273.15

=65.55

= 338.7 K

So, we could say that, 150 °F is equivalent to 338.7K

Temperature Conversion Table Formula

Unit To Celsius To Fahrenheit To Kelvin
Celsius C (°) C(9⁄5) + 32 C + 273.15
Fahrenheit (F − 32) × 5⁄9 F (F − 32) × 5⁄9 + 273.15
Kelvin K – 273.15 (K – 273.15) * 9/5 + 32 K

Some Tips and Tricks to Remember Temperature Conversion Formulas:

  • To remember the temperature conversion formula without fractions, remember 5(°F)= 9(°C) +160.
  • Another method for converting Celsius to Fahrenheit is to double the Celsius degree by 1.8 and then add 32.
  • Subtract 30 from the Celsius temperature and divide by 2 to get the estimated temperature in degrees Fahrenheit.

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