Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin instantly.
Overview
Convert temperatures between Celsius, Fahrenheit, and Kelvin. These three scales cover most practical needs: Celsius for everyday metric use, Fahrenheit for US-system contexts, and Kelvin for scientific and thermodynamic calculations. The tool computes all three values simultaneously from any one input.
Common use cases
- Understand weather forecasts reported in Fahrenheit when you use Celsius.
- Convert oven temperatures in recipes from °F to °C or vice versa.
- Convert process temperatures in engineering between Celsius and Kelvin.
- Check freezing/boiling reference points when calibrating instruments.
Examples and notes
- 100°C (boiling point of water) = 212°F = 373.15 K.
- Normal human body temperature is 37°C = 98.6°F.
- A US recipe calling for 350°F means your oven should be set to 175°C.
Important note
Kelvin has no degree symbol — 300 K, not 300°K. Negative Kelvin values are physically impossible; if your input produces a negative Kelvin result, the input temperature is below absolute zero.
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
Multiply the Celsius value by 9/5 then add 32. For example, 100°C × 9/5 + 32 = 212°F.
What is absolute zero in Celsius?
Absolute zero is 0 Kelvin = −273.15°C = −459.67°F. It is the lowest theoretically possible temperature.
What temperature is the same in Celsius and Fahrenheit?
−40° is the point where Celsius and Fahrenheit scales intersect: −40°C = −40°F.
Why does Kelvin have no degree symbol?
Kelvin is an absolute scale, not a relative one. By international convention, it is written as '300 K' without a degree symbol.