Celsius to Kelvin Converter
Enter the temperature in celsius below to convert it to kelvin.
Convert Celsius to Kelvin
Enter a value in celsius (°C) to convert to kelvin (K).
Celsius to Kelvin Conversion Table
Table showing various celsius measurements converted to kelvin. Click any preset value or arrow to load it into the converter.
How to Convert Celsius to Kelvin
To convert celsius (°C) to kelvin (K), apply the thermodynamic scale offset formula rather than a single multiplication factor because the two temperature scales have different zero points.
You can use this standard formula to convert celsius to kelvin:
Each temperature reading in celsius is scaled and shifted by the zero-point offset to obtain the exact temperature in kelvin.
For example, here's how to convert 25 °C to kelvin using the formula above:
How Many Kelvin Are in a Celsius?
On the Celsius scale, a reading of 1 °C corresponds to 274.15 K on the Kelvin scale.
Our celsius to kelvin calculator automatically converts your temperature measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Celsius and kelvin are both units used to measure temperature. Keep reading to learn more about each unit.
What Is a Celsius?
Temperature scale where water freezes at 0 °C and boils at 100 °C. It serves as a primary reference unit for measuring temperature across scientific and practical applications. [1]
The celsius is classified as an International System of Units (SI) unit of temperature. Celsius can be abbreviated as °C; for example, 1 celsius can be written as 1 °C.
As the primary coherent reference unit for temperature in this category, all other temperature units are mathematically anchored to the celsius (°C).
In practice, celsius (°C) are widely used across standard temperature applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
What Is a Kelvin?
Base SI thermodynamic temperature scale starting at absolute zero (0 K = -273.15 °C). It serves as a primary reference unit for measuring temperature across scientific and practical applications. [2]
The kelvin is classified as an International System of Units (SI) unit of temperature. Kelvin can be abbreviated as K; for example, 1 kelvin can be written as 1 K.
When working with kelvin (K) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, kelvin (K) are widely used across standard temperature applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
When converting temperature between celsius (°C) and kelvin (K), keep full floating-point precision (1 °C = 274.15 K; 1 K = -272.15 °C) during intermediate calculations and round only the final kelvin figure to match your instrument tolerance.
More Celsius & Kelvin Conversions
Need to calculate in the opposite direction? Use our kelvin to celsius converter (K to °C) to switch your starting unit immediately. You can also explore related tools such as converting fahrenheit to kelvin, converting celsius to fahrenheit, or converting celsius to rankine.
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Temperature)·Temperature Metrology Standard — Celsius (°C) to Kelvin (K)
- [2]BIPM SpecificationBIPM (SI Base Unit: Kelvin (K))·Unit Specifications: Celsius (°C) & Kelvin (K)
- [3]NIST SP 811 ReferenceNIST SP 811 (NIST SP 811 App. B.9 (Heat & Temp))·Conversion Factors & Mathematical Basis (°C to K)