Celsius to Kelvin Converter

Convert Celsius to Kelvin instantly. Free °C to K converter with quick reference table and formula. Kelvin = Celsius + 273.15. Used in physics and chemistry.

273.15
Kelvin (K)
Input Value
0°C (Celsius)
Kelvin is the SI unit of temperature. Absolute zero (0K) is the lowest possible temperature.

How to Convert Celsius to Kelvin

Simple formula with a worked example

To convert Celsius (°C) to Kelvin (K), use this formula:

K = °C + 273.15

Example: Convert 25 °C to K

25 °C = 298.15 K

To convert back, use: °C = K − 273.15

Celsius to Kelvin Conversion Table

Quick reference for common Celsius to Kelvin conversions

Celsius (°C)Kelvin (K)
-40 °C233.15 K
-20 °C253.15 K
0 °C273.15 K
10 °C283.15 K
20 °C293.15 K
25 °C298.15 K
37 °C310.15 K
50 °C323.15 K
100 °C373.15 K
200 °C473.15 K

About Celsius and Kelvin

Understanding these temperature scales

Celsius (°C)

Celsius is the most widely used temperature scale. Water freezes at 0°C and boils at 100°C at sea level.

Kelvin (K)

Kelvin is the SI unit of temperature. Absolute zero (0K) is the lowest possible temperature.

When You Need This Conversion

  • physics calculations
  • chemistry lab work
  • scientific research
  • engineering thermodynamics

Did you know? The Kelvin scale starts at absolute zero (−273.15°C), the coldest possible temperature where all molecular motion ceases. It's the SI unit of temperature.

Frequently Asked Questions

Common questions about converting Celsius to Kelvin

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