100 degrees Celsius is equal to 373.15 kelvin.
The conversion from Celsius to kelvin is done by adding 273.15 to the Celsius temperature. This is because the kelvin scale is an absolute temperature scale starting at absolute zero, and 0°C corresponds to 273.15 K.
Conversion Tool
Result in kelvin:
Conversion Formula
The formula to convert Celsius (°C) to kelvin (K) is:
K = °C + 273.15
This formula works because the kelvin scale starts at absolute zero, which is -273.15°C. So you add 273.15 to any Celsius temperature to find its equivalent in kelvin.
For example, converting 100°C to kelvin:
- Start with 100°C
- Add 273.15 to 100: 100 + 273.15 = 373.15
- The result is 373.15 K
Conversion Example
- Convert 25°C to kelvin:
- Take 25°C
- Add 273.15: 25 + 273.15 = 298.15 K
- So, 25°C equals 298.15 kelvin
- Convert -40°C to kelvin:
- Start with -40°C
- Add 273.15: -40 + 273.15 = 233.15 K
- The kelvin value is 233.15 K
- Convert 0°C to kelvin:
- 0°C + 273.15 = 273.15 K
- This means freezing point of water is 273.15 K
- Convert 150°C to kelvin:
- 150 + 273.15 = 423.15 K
- 150°C equals 423.15 kelvin
Conversion Chart
| Celsius (°C) | Kelvin (K) |
|---|---|
| 75.0 | 348.15 |
| 80.0 | 353.15 |
| 85.0 | 358.15 |
| 90.0 | 363.15 |
| 95.0 | 368.15 |
| 100.0 | 373.15 |
| 105.0 | 378.15 |
| 110.0 | 383.15 |
| 115.0 | 388.15 |
| 120.0 | 393.15 |
| 125.0 | 398.15 |
This chart shows Celsius temperatures from 75 to 125 degrees and their kelvin equivalents. To use it, find your Celsius value, then read across to see the kelvin number. This can saves time for quick checks without calculation.
Related Conversion Questions
- What is 100 degrees Celsius in kelvin exactly?
- How do I convert 100°C to kelvin in a simple way?
- Is 100 Celsius higher than 370 kelvin?
- Why do I add 273.15 when converting 100 Celsius to kelvin?
- What kelvin temperature corresponds to boiling water at 100°C?
- Can you explain 100°C to kelvin conversion step-by-step?
- What’s the difference between 100°C and its kelvin value?
Conversion Definitions
Celsius (°C): Celsius is a scale and unit of temperature where 0 degrees represents the freezing point of water and 100 degrees marks the boiling point at standard atmospheric pressure. It’s widely used for everyday temperature measurements globally, especially in science and weather reports.
Kelvin (K): Kelvin is the SI base unit of temperature, used mostly in science. It starts at absolute zero, the lowest possible temperature where all molecular motion stops. Unlike Celsius, kelvin has no negative values and increments are same size as Celsius degrees.
Conversion FAQs
Why does kelvin start at 0 but Celsius doesn’t?
Kelvin scale begins at absolute zero (0 K), which is the theoretical point where particles have minimal energy. Celsius zero is based on water’s freezing point. So, kelvin reflects absolute thermal energy, Celsius is relative to water’s physical state.
Can temperature in kelvin be negative?
No, kelvin cannot be negative because it starts at absolute zero, the lowest possible temperature. Negative kelvin values would imply less than zero thermal energy, which is impossible physically.
Is boiling water always 373.15 K?
Boiling water at standard atmospheric pressure equals 373.15 K, but if pressure changes, boiling temperature changes too. So 373.15 K is correct only at 1 atmosphere pressure.
Are Celsius and kelvin degree sizes different?
No, the size of one degree is same in both scales. The difference lies in where zero starts. Celsius zero is water freezing point, kelvin zero is absolute zero.
How precise is the 273.15 constant?
273.15 is a defined value setting the zero point between Celsius and kelvin scales. It’s precise for most practical purposes but can vary slightly in scientific measurements involving thermodynamic definitions.