Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin and Rankine instantly, with common reference temperatures.
About Temperature Converter
This temperature converter changes a temperature between Celsius, Fahrenheit, Kelvin and Rankine as you type. Enter a value in any of the four boxes and the other three update at once, so it works as a Celsius to Fahrenheit and Fahrenheit to Celsius converter in one.
A reference table lists familiar temperatures such as the freezing and boiling points of water, normal body temperature and a hot Indian summer day. It is handy for checking fever readings, oven settings in recipes, weather reports from abroad and science homework. The converter is free, needs no sign-up and runs in your browser.
How to use Temperature Converter
- Type a temperature in any of the four boxes.
- The other three scales update as you type.
- Use the reference table for familiar temperatures such as body temperature or boiling water.
Frequently asked questions
What is the formula for Celsius to Fahrenheit?
°F = °C × 9/5 + 32. For example 37 °C × 1.8 + 32 = 98.6 °F.
What is the formula for Fahrenheit to Celsius?
°C = (°F − 32) × 5/9. For example (100 − 32) × 5/9 = 37.78 °C.
Why doesn’t Kelvin use a degree sign?
Kelvin is an absolute scale starting at absolute zero, and since 1967 its unit is simply “kelvin” (K). 0 °C = 273.15 K.
At what temperature are Celsius and Fahrenheit equal?
At −40: −40 °C is exactly −40 °F.
What is 100 °F in Celsius?
100 °F is about 37.8 °C. Subtract 32 and multiply by 5/9.
What is normal body temperature in Fahrenheit?
Normal body temperature is about 37 °C, which is 98.6 °F.
How do I convert Celsius to Kelvin?
Add 273.15 to the Celsius value. So 25 °C is 298.15 K.
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