100 degrees Celsius equals 373.15 kelvin.
To convert Celsius to kelvin, you add 273.15 to the Celsius temperature. This is because kelvin starts at absolute zero, which is -273.15°C, so to get kelvin value you shift the scale by this constant amount.
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. Since kelvin doesn’t use negative values, you shift the Celsius temperature by adding 273.15. For example, if you have 100°C, then:
- Start with the Celsius value: 100
- Add 273.15 to it: 100 + 273.15 = 373.15
- The result is 373.15 kelvin
Conversion Example
- Convert 25°C to kelvin:
- Take the Celsius value: 25
- Add 273.15: 25 + 273.15 = 298.15
- Result is 298.15 K
- Convert -40°C to kelvin:
- Start with -40
- Add 273.15: -40 + 273.15 = 233.15
- Kelvin temperature is 233.15 K
- Convert 0°C to kelvin:
- Celsius value is 0
- Add 273.15: 0 + 273.15 = 273.15
- Kelvin equals 273.15 K
- Convert 50°C to kelvin:
- Take 50 as Celsius
- Add 273.15: 50 + 273.15 = 323.15
- Result: 323.15 K
- Convert -273.15°C to kelvin:
- The lowest Celsius temperature is -273.15
- Add 273.15: -273.15 + 273.15 = 0
- Kelvin starts at 0 K
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 |
The chart help you quickly find the kelvin equivalent for Celsius values between 75 and 125. Just find the Celsius temperature in the left column and read across to see the kelvin value.
Related Conversion Questions
- How much is 100 degrees Celsius in kelvin?
- What is the kelvin temperature for 100 Celsius?
- Convert 100°C to kelvin temperature scale?
- How to calculate kelvin from 100 degrees Celsius?
- What kelvin value corresponds to 100 Celsius?
- Is 100°C equal to more than 300 kelvin?
- How do you change 100 celsius into kelvin units?
Conversion Definitions
Celsius (°C): Celsius is a temperature scale where water freezes at 0 degrees and boils at 100 degrees under standard atmospheric pressure. It is a metric unit commonly used worldwide, based on the properties of water, allowing easy temperature measurement in everyday life and science.
Kelvin (K): Kelvin is the SI base unit of temperature, used mainly in science and engineering. It starts at absolute zero, the lowest possible temperature where particles stop moving. The kelvin scale does not use degree symbol and is directly related to Celsius by adding 273.15.
Conversion FAQs
Why add 273.15 when converting Celsius to kelvin?
Because kelvin scale starts at absolute zero, which is −273.15°C. Adding 273.15 shifts Celsius temperatures upwards so the lowest point is zero kelvin. This removal of negative numbers makes kelvin useful for scientific calculations about energy and particle motion.
Can temperature in kelvin be negative?
No, kelvin temperature can’t be negative. Zero kelvin is absolute zero, the lowest temperature possible where molecular motion stops. Negative temperatures are meaningless in kelvin scale, unlike Celsius or Fahrenheit which can have negative values.
Is kelvin used only in physics?
Kelvin is mostly used in science fields like physics, chemistry, and astronomy because it relates to absolute energy states of matter. However, Celsius is more common in daily life for weather and cooking. Kelvin is preferred where precise temperature measurement is needed.
How precise is the conversion from Celsius to kelvin?
The conversion is exact to the decimal point 273.15, based on the definition of the kelvin scale. Rounding errors can occur when displaying many decimals, but for practical purposes, conversions are very precise and reliable.
Does converting 100°C to kelvin change the meaning of temperature?
The temperature’s physical meaning stays the same but represented on a different scale. Celsius is relative to water freezing and boiling, kelvin measures absolute thermal energy starting from zero. So 100°C equals 373.15 K but both describe the same thermal state.
Last Updated : 08 July, 2025
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Sandeep Bhandari holds a Bachelor of Engineering in Computers from Thapar University (2006). He has 20 years of experience in the technology field. He has a keen interest in various technical fields, including database systems, computer networks, and programming. You can read more about him on his bio page.