100 Celsius to Kelvin – Answer with Formula

100 degrees Celsius is equal to 373.15 kelvin.

To convert Celsius to kelvin, you add 273.15 to the Celsius temperature. This happens because kelvin scale starts at absolute zero, which is -273.15 degrees Celsius, so the two scales have a fixed offset. Therefore, 100 Celsius plus 273.15 equals 373.15 kelvin.

Conversion Tool

Conversion Formula

The conversion from Celsius (°C) to kelvin (K) uses a simple addition formula:

K = °C + 273.15

Kelvin scale starts at absolute zero, the lowest temperature possible where particles have minimal energy. The Celsius scale sets 0°C at water’s freezing point. Because kelvin scale begins 273.15 degrees below zero Celsius, adding 273.15 converts Celsius to kelvin correctly.

For example, converting 100°C:

• 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 as input value
  • Add 273.15: 25 + 273.15 = 298.15
  • So, 25°C equals 298.15 K
• Convert -40°C to kelvin:
  • Start with -40
  • Add 273.15: -40 + 273.15 = 233.15
  • Result is 233.15 K
• Convert 0°C to kelvin:
  • Value is 0
  • Add 273.15: 0 + 273.15 = 273.15
  • Absolute freezing point of water is 273.15 K
• Convert 50.5°C:
  • Input 50.5
  • Add 273.15: 50.5 + 273.15 = 323.65
  • Final kelvin temperature is 323.65 K

Conversion Chart

The chart shows Celsius values from 75.0 to 125.0, alongside their kelvin equivalents. You can find a Celsius temperature on left column, then read across to see its kelvin value. This is helpful for quick reference without needing to calculate manually.

Related Conversion Questions

• What is the kelvin equivalent of 100 degrees Celsius?
• How do I convert 100 °C to kelvin using a formula?
• Is 100 Celsius hotter than 373 kelvin?
• What temperature in kelvin matches 100°C exactly?
• Can 100 °C be directly converted to kelvin without a calculator?
• Why does converting 100 Celsius to kelvin add 273.15?
• How to convert negative Celsius values like -100 °C to kelvin?

Conversion Definitions

Celsius: Celsius is a temperature scale where zero degrees marks the freezing point of water, and 100 degrees marks boiling point at standard atmospheric pressure. Temperatures are measured relative to these fixed points, widely used for weather and scientific measurements.

Kelvin: Kelvin is an absolute temperature scale starting at absolute zero, the lowest possible temperature where particles have minimal motion. Each kelvin is equal in size to one degree Celsius but shifted so zero kelvin equals -273.15 °C.

Conversion FAQs

Why does the kelvin scale start at absolute zero?

The kelvin scale sets zero at absolute zero, which is the theoretical point where all molecular motion stops. This makes kelvin useful in physics and chemistry because it represent absolute energy content, unlike Celsius that sets zero at water’s freezing point.

Can kelvin values be negative like Celsius?

No, kelvin temperatures can’t be negative. Because zero kelvin is absolute zero, temperatures below this doesn’t exist physically. Celsius and Fahrenheit can have negative values because their zero points are arbitrarily set relative to freezing and boiling water.

Is the formula for converting Celsius to kelvin always adding 273.15?

Yes, the conversion from Celsius to kelvin always involves adding 273.15. This value is the exact difference between zero Celsius and absolute zero on the kelvin scale, which keeps the scale consistent for scientific calculations.

What is the difference in precision between Celsius and kelvin?

Both Celsius and kelvin scales have equal step size per degree, meaning a change of 1°C equals 1 K. Precision depends on measuring instruments, not the scale itself, so converting between these doesn’t affect accuracy if proper decimal places are used.

Why do scientists prefer kelvin over Celsius?

Scientists use kelvin because it starts at absolute zero, providing an absolute reference point for temperature. This is critical in thermodynamics and physics where absolute energy levels matter, unlike Celsius which is relative to water’s freezing point.