Temperature Converter
Convert temperatures between Celsius, Fahrenheit and Kelvin.
Results update as you type.
About this calculator
A temperature converter changes a reading between Celsius, Fahrenheit and Kelvin. Unlike most unit conversions these scales do not share a zero point, so the tool converts through Celsius using the exact offset-and-scale formulas rather than a single multiplier.
Frequently asked questions
How do I convert Celsius to Fahrenheit?
Multiply the Celsius value by 9/5 and add 32. So 100 °C = 100 × 1.8 + 32 = 212 °F, the boiling point of water, and 0 °C = 32 °F, its freezing point.
How do I convert Fahrenheit to Celsius?
Subtract 32, then multiply by 5/9. For example 98.6 °F = (98.6 − 32) × 5/9 = 37 °C, normal human body temperature.
What is Kelvin?
Kelvin is the absolute temperature scale used in science. It uses the same degree size as Celsius but starts at absolute zero, so K = °C + 273.15. Water freezes at 273.15 K.
Results are estimates for general guidance only, not financial, medical or tax advice.