ToolNestCelsius to Kelvin Converter
Convert celsius to kelvin instantly with our free temperature converter. 0 °C = 273.15 K — type any value below and the result updates live.
Celsius to Kelvin Formula
K = °C + 273.15 (°C = K − 273.15)
Kelvin has no negative values — 0 K is absolute zero, the coldest theoretically possible temperature (−273.15 °C).
Celsius to Kelvin Conversion Table
| Celsius | Kelvin | |
|---|---|---|
| -273.15 °C | = | 0 K |
| 0 °C | = | 273.15 K |
| 20 °C | = | 293.15 K |
| 25 °C | = | 298.15 K |
| 100 °C | = | 373.15 K |
| 1,000 °C | = | 1,273.15 K |
About Celsius and Kelvin
Celsius sets 0° at water's freezing point and 100° at boiling (at sea level). The metric standard used by science and nearly every country.
Kelvin is the absolute temperature scale starting at absolute zero (0 K = −273.15 °C). The SI unit used in physics and engineering.
Frequently Asked Questions
What is the formula to convert celsius to kelvin?
K = °C + 273.15. To convert back, use °C = K − 273.15.
0 °C = 273.15 K — how do I convert other values?
Type any value into the converter above; it applies the offset formula automatically, handling the different zero points of the two scales.
Why can't I just multiply to convert temperature?
Because celsius and kelvin start at different zero points. Kelvin has no negative values — 0 K is absolute zero, the coldest theoretically possible temperature (−273.15 °C).
Where is celsius-to-kelvin conversion used?
Celsius sets 0° at water's freezing point and 100° at boiling (at sea level). The metric standard used by science and nearly every country. Kelvin is the absolute temperature scale starting at absolute zero (0 K = −273.15 °C). The SI unit used in physics and engineering.