Kelvin ↔ Celsius Converter

Instantly convert between Kelvin (K) and Celsius (°C). Kelvin is an absolute temperature scale — it cannot be negative.

Kelvin (K)

Celsius (°C)

Formula: °C = K − 273.15 | K = °C + 273.15

Note: 0 K is absolute zero (−273.15 °C). Kelvin values below 0 are invalid.