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.
How the calculation works
Converts source to Celsius, then maps to Fahrenheit/Kelvin.
Edge cases and validation notes
- Absolute-zero boundaries
- Negative temperatures
- Fractional precision
Worked examples
- 350°F -> 176.6667°C
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.