Temperature conversion formulas refer to changing the value of temperature from one unit to another. They are many temperature conversion methods. Among them Kelvin, Celsius and Fahrenheit are the most commonly used methods. According to the Kelvin scale, the freezing point of water is 273.15K and the boiling point is 373.15K. According to the Fahrenheit scale, the freezing point of water is 32°F and the boiling point is 212°F. According to the Celsius scale, the freezing point of water is 0°C and the boiling point is 100°C.
What are Temperature Conversion Formulas?
There can be three main conversions of temperature which are:
- Conversion Between Celsius and Kelvin
- Conversion Between Fahrenheit and Kelvin
- Conversion Between Celsius and Fahrenheit
Conversion of Temperature Between Celsius and Kelvin
- The temperature conversion formula from Celsius to Kelvin is:
| K = C + 273.15 |
- The temperature conversion formula from Kelvin to Celcius is:
| C = K − 273.15 |
Conversion of Temperature Between Fahrenheit and Celsius
Fahrenheit to Celsius and Celsius to Fahrenheit formulas are listed below. These formulas will help to convert the temperature into required units.
- The temperature conversion formula from Fahrenheit to Celsius is:
| C = (F − 32) × 5⁄9 |
- The Temperature Conversion Formula from Celsius to Fahrenheit is:
| F = C(9⁄5) + 32 |
Conversion of Temperature Between Fahrenheit and Kelvin
- The Temperature Conversion Formula from Fahrenheit to Kelvin is:
| K = (F − 32) × 5⁄9 + 273.15 |
- The Temperature Conversion Formula from Kelvin to Fahrenheit is:
| F = (K – 273.15) × 9⁄5 + 32 |
Temperature Conversion Formula Table
| Unit | To Celsius | To Fahrenheit | To Kelvin |
|---|---|---|---|
| Celsius (C) | 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 |
Solved Examples
Question: What is 30°C in Kelvin?
Solution:
The temperature conversion formula from Celsius to Kelvin is, K = C + 273.15
K = 30 + 273.15 K = 303.15
Question 2: Convert 50°C to °F.
Solution:
Celsius to Fahrenheit conversion formula is given by:
°F = °C(9⁄5) + 32
= 50 (9/5) + 32
= 90 + 32
= 122
Therefore, 50°C = 122°F
Question 3: Convert 113°F to Kelvin.
Solution:
Fahrenheit to Kelvin conversion formula is given by:
K = (F − 32) × 5⁄9 + 273.15
= (113 – 32) × (5/9) + 273.15
= 81 × (5/9) + 273.15
= 45 + 273.15
= 318.15
Therefore, 113°F = 318.15 K
Question 4: Convert 225 K to Celsius.
Solution:
Kelvin to Celsius conversion formula is given by:
C = K – 273.15
= 225 – 273.15
= -48.15
Therefore, 225 K = -48.15°C
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