How do I convert Celsius (°C) to Kelvin (K)?

1 celsius equals 274.15 kelvin using SI-based conversion and precise factors.

What is the formula to convert Celsius (°C) to Kelvin (K)?

Temperature conversions include an offset (e.g., +273.15 for K, or +/−32 with ratio 5/9 and 9/5).

Yes, it follows an exact affine transformation between scales (ratio + offset).

Use the shareable URL pattern: /convert/celsius-to-kelvin/1

Category: Temperature

Value From To Precision

274.15 kelvin

1 celsius = 274.15 kelvin

High-precision rounding: 6 decimals

We convert by pivoting through the SI base unit for Temperature and applying exact factors where applicable.

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Temperature scales combine ratios and offsets; Kelvin is absolute.

Celsius (°C)

Offset scale with 0 °C at water’s freezing point.

History: Named after Anders Celsius; redefined via absolute scales.

Kelvin (K)

Absolute thermodynamic scale; SI base unit.

History: Defined via Boltzmann constant since 2019.