How to Convert Kelvin to Celsius
Converting Kelvin to Celsius is essential in scientific applications. Kelvin is the SI unit of temperature, but Celsius is more commonly used in everyday applications.
155.0 K = -118.15 °C
To convert Kelvin to Celsius, simply subtract 273.15 from the Kelvin value.
Step-by-Step
- Start with your value: 155.0 K
- Subtract 273.15
- Result: -118.15 °C
Formula: °C = K - 273.15
💡 Memory Tip: 273.15 K = 0°C (water freezing). 373.15 K = 100°C (water boiling). Kelvin is always 273.15 degrees higher than Celsius.
Kelvin to Celsius Quick Reference
| Kelvin | °C | Common Reference |
|---|---|---|
| 0 | -273.15 | Absolute zero (coldest) |
| 233.15 | -40 | Same in both scales |
| 273.15 | 0 | Water freezing point |
| 293.15 | 20 | Room temperature |
| 310.15 | 37 | Body temperature |
| 373.15 | 100 | Water boiling point |
Understanding Kelvin and Celsius
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.
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.
Learn more about Celsius on Wikipedia →
Key Facts
Kelvin is used in scientific equations. Kelvin doesn't use the degree symbol. Absolute zero (0 K) is the coldest possible temperature.
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
155 K equals -118.15 °C. Formula: K - 273.15 = °C
°C = K - 273.15
For 155 K: 155 - 273.15 = -118.15 °C
155 K = -180.67 °F
155 K is -118.2°C - below freezing but still valid (not absolute zero).
Kelvin is an absolute temperature scale starting from absolute zero, so it's measured in "kelvins" not "degrees Kelvin". Just like meter, not "degree meter".