Temperature Converter
Convert Celsius, Fahrenheit, Kelvin, Rankine and Réaumur quickly and accurately.
How is it calculated?
How does temperature conversion work?
Temperature conversion uses formulas that can include multiplication, division and offsets. To convert Celsius to Fahrenheit, multiply by 9/5 and add 32. To convert Fahrenheit to Celsius, subtract 32 and multiply by 5/9. The Kelvin scale starts at absolute zero, equivalent to -273.15 °C.
Conversion examples
- 0 °C = 32 °F.
- 100 °C = 212 °F.
- 25 °C = 77 °F.
- 0 °C = 273.15 K.
- -40 °C = -40 °F.
- 0 K = -273.15 °C.
Frequently asked questions
How do you convert Celsius to Fahrenheit?
Multiply the Celsius temperature by 9/5 and add 32. For example, 20 °C equals 68 °F.
How do you convert Fahrenheit to Celsius?
Subtract 32 from the Fahrenheit temperature and multiply by 5/9. For example, 68 °F equals 20 °C.
What is 100 degrees Fahrenheit in Celsius?
100 °F is approximately 37.7778 °C.
What is the difference between Celsius and Kelvin?
Both scales have equally sized intervals but different zero points. Add 273.15 to Celsius to obtain Kelvin.
What is absolute zero?
Absolute zero is 0 K, equivalent to -273.15 °C, -459.67 °F and 0 °R.