Celsius to Kelvin Converter
Convert °C to K instantly — and see every other temperature unit at once.
1 °C=274.15 K
1 °C in every unit
Celsiusfrom
1°C
Fahrenheit
33.8°F
Kelvin
274.15K
Rankine
493.47°R
Common Celsius to Kelvin conversions
| Celsius (°C) | Kelvin (K) |
|---|---|
| -273.15 °C | 0 K |
| -100 °C | 173.15 K |
| -40 °C | 233.15 K |
| 0 °C | 273.15 K |
| 20 °C | 293.15 K |
| 25 °C | 298.15 K |
| 37 °C | 310.15 K |
| 100 °C | 373.15 K |
| 500 °C | 773.15 K |
| 1000 °C | 1273.15 K |
The formula
Celsius is used worldwide for everyday temperature — weather, cooking, and science.
Kelvin is the SI base unit of temperature, used in physics and chemistry — it starts at absolute zero.
Worked examples
0 °C→273.15 K— Freezing point of water
Apply °C + 273.15 with input = 0. Result: 273.15 K.
100 °C→373.15 K— Boiling point of water
Apply °C + 273.15 with input = 100. Result: 373.15 K.
25 °C→298.15 K— Room temperature
Apply °C + 273.15 with input = 25. Result: 298.15 K.
-273.15 °C→0 K— Absolute zero
Apply °C + 273.15 with input = -273.15. Result: 0 K.
FAQ
How do I convert Celsius to Kelvin?
Use the formula: K = °C + 273.15. You can also use the converter above — type any value and the result updates instantly.
Where are Celsius used?
Celsius is used worldwide for everyday temperature — weather, cooking, and science.
Where are Kelvin used?
Kelvin is the SI base unit of temperature, used in physics and chemistry — it starts at absolute zero.
How do I convert Kelvin back to Celsius?
Use the Kelvin to Celsius converter.