Kelvin to Celsius Converter

Convert Kelvin to Celsius instantly. Free K to °C converter with quick reference table and formula. Celsius = Kelvin − 273.15. Essential for science students.

-273.15
Celsius (°C)
Input Value
0K (Kelvin)
Celsius is the most widely used temperature scale. Water freezes at 0°C and boils at 100°C at sea level.

How to Convert Kelvin to Celsius

Simple formula with a worked example

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

°C = K − 273.15

Example: Convert 300 K to °C

300 K = 26.85 °C

To convert back, use: K = °C + 273.15

Kelvin to Celsius Conversion Table

Quick reference for common Kelvin to Celsius conversions

Kelvin (K)Celsius (°C)
0 K-273.15 °C
50 K-223.15 °C
100 K-173.15 °C
200 K-73.15 °C
273.15 K0 °C
300 K26.85 °C
310 K36.85 °C
373.15 K100 °C
500 K226.85 °C
1,000 K726.85 °C

About Kelvin and Celsius

Understanding these temperature scales

Kelvin (K)

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

Celsius (°C)

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

When You Need This Conversion

  • reading scientific papers
  • lab temperature interpretation
  • physics homework
  • astronomy data

Frequently Asked Questions

Common questions about converting Kelvin to Celsius

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Last updated Mar 21, 2026