Celsius to Kelvin converter

Convert degrees Celsius (°C) to kelvin (K). Formula: K = °C + 273.15.

Converter tool

Formula: K = °C + 273.15

Quick examples

CelsiusKelvin
-273.150
0273.15
25298.15
100373.15

How to convert Celsius to Kelvin

Formula: K = °C + 273.15.

Reverse conversion: °C = K − 273.15

Tip: Use the swap button to reverse the calculation instantly.

Celsius → Kelvin FAQs

What constants are used?

We use exact constants: 273.15 and 459.67 for Kelvin relations; 9/5 and 5/9 for °C/°F.

How do I go the other way?

°C = K − 273.15

Are the results rounded?

Calculations use exact constants; values are displayed with sensible rounding for readability.