How to Convert Celsius to Kelvin
Converting Celsius to Kelvin is essential in scientific applications. Kelvin is the SI unit of temperature and is used in physics, chemistry, and engineering calculations.
0.0 °C = 273.15 K
To convert Celsius to Kelvin, simply add 273.15 to the Celsius value. That's it!
Step-by-Step
- Start with your value: 0.0 °C
- Add 273.15
- Result: 273.15 K
Formula: K = °C + 273.15
💡 Memory Tip: 0°C = 273.15 K (water freezing). 100°C = 373.15 K (water boiling). Absolute zero = 0 K = -273.15°C.
Celsius to Kelvin Quick Reference
| °C | Kelvin | Common Reference |
|---|---|---|
| -273.15 | 0 | Absolute zero (coldest possible) |
| -40 | 233.15 | Same in both scales |
| 0 | 273.15 | Water freezing point |
| 20 | 293.15 | Room temperature |
| 37 | 310.15 | Body temperature |
| 100 | 373.15 | Water boiling point |
Understanding Celsius and Kelvin
What is Celsius?
Celsius (°C) is a temperature scale used by most countries worldwide. Water freezes at 0°C and boils at 100°C at sea level. The scale was originally called centigrade.
What is Kelvin?
Kelvin (K) is the SI unit of temperature. Unlike Celsius and Fahrenheit, Kelvin starts at absolute zero (the coldest possible temperature). 0 K = -273.15°C.
Learn more about Kelvin on Wikipedia →
Key Facts
Kelvin is used in scientific equations. No negative values in Kelvin. Kelvin doesn't use the degree symbol (°K is wrong, just K). Water freezes at 273.15 K.
Key Conversion Points
- 0 K = -273.15°C (absolute zero)
- 273.15 K = 0°C (freezing)
- 293.15 K = 20°C (room temp)
- 310.15 K = 37°C (body temp)
- 373.15 K = 100°C (boiling)
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Frequently Asked Questions
0 °C equals 273.15 K. Formula: K = °C + 273.15
K = °C + 273.15
For 0°C: 0 + 273.15 = 273.15 K
0 °C = 32.00 °F. Formula: (°C × 9/5) + 32
Absolute zero = 0 K = -273.15°C. This is the coldest possible temperature where all molecular motion stops.
No, Kelvin cannot be negative. 0 K is absolute zero - the lowest possible temperature. Negative Kelvin would mean less than nothing!