Temperature Converter
Convert between Celsius, Fahrenheit and Kelvin instantly. Type a temperature and see all three scales at once. Free and accurate.
Convert temperature
–Celsius
–Fahrenheit
–Kelvin
Formulas: °F = °C x 9/5 + 32. K = °C + 273.15.
How to use the Temperature Converter
- Enter a temperature.
- Choose the scale it is in: Celsius, Fahrenheit or Kelvin.
- Read the equivalent in all three scales. Results update as you type.
- Values below absolute zero are flagged because they cannot exist.
Frequently asked questions
How do you convert Celsius to Fahrenheit?
Multiply by 9/5 (1.8) and add 32. For example 20 C is 20 x 1.8 + 32 = 68 F.
How do you convert Fahrenheit to Celsius?
Subtract 32, then multiply by 5/9. For example 98.6 F is (98.6 – 32) x 5/9 = 37 C.
What is Kelvin?
Kelvin is the SI unit of temperature. It starts at absolute zero, so it has no negative values, and one kelvin is the same size as one degree Celsius.
At what temperature are Celsius and Fahrenheit equal?
At -40. Minus 40 C and minus 40 F are the same temperature.
What are the freezing and boiling points of water?
At standard atmospheric pressure, water freezes at 0 C (32 F) and boils at 100 C (212 F).