Temperature Converter
Enter a temperature to see it in Celsius, Fahrenheit and Kelvin.
Results
- 100 °F =
- Kelvin
American recipes, US weather forecasts and some thermometers use Fahrenheit. Temperature conversion differs from other units: multiplying by a factor is not enough, because the zero point shifts as well.
On the Celsius scale water freezes at 0 and boils at 100. On Fahrenheit those points are 32 and 212. Kelvin, used in science, starts at absolute zero (−273.15 °C).
How to calculate Temperature conversion
- Enter the temperature.
- Choose the units to convert from and to.
- Read the result and the value on the third scale.
Temperature conversion formula
°C = (°F − 32) × 5 ÷ 9°F = °C × 9 ÷ 5 + 32K = °C + 273.15
Temperature conversion example
100 °F is (100 − 32) × 5 ÷ 9 = 37.78 °C. An oven at 180 °C is 180 × 9 ÷ 5 + 32 = 356 °F.
Temperature conversion: common questions
Is there a quick way to convert in my head?
Roughly: subtract 30 from Fahrenheit and halve it. For 80 °F that gives 25 °C; the exact value is 26.7 °C.
What temperature counts as a fever?
Usually 38 °C or above, which is 100.4 °F.
Where do the two scales meet?
At −40. −40 °C and −40 °F are the same temperature.