Kelvin (K)
The kelvin is the SI base unit of thermodynamic temperature, with 0 K at absolute zero and increments the same size as one Celsius degree.
Kelvin appears in physics, chemistry, and engineering wherever absolute temperature is required.
Kelvin to Celsius
Convert kelvin to celsius instantly. Type in either field — results update live.
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Temperature Kelvin Celsius
1 kelvin = -272.15 degrees Celsius
Unit
Unit
Conversion table
Selected K values converted to °C using the exact offset formulas from this tool.
| K | °C |
|---|---|
| 0 | -273.15 |
| 200 | -73.15 |
| 273.15 | 0 |
| 300 | 26.85 |
| 373.15 | 100 |
How to convert
Exact offset formulas in both directions, plus a worked example.
°C = K − 273.15
K = °C + 273.15
Subtract 273.15 from kelvin to get Celsius.
Add 273.15 to Celsius to get kelvin.
Example: convert 300 K to °C
300 K → 26.85 °C (kelvin to celsius)
About these units
Short background on the units used in this conversion.
Celsius (°C)
The Celsius scale sets the freezing point of water at 0° and the boiling point at 100° at standard atmospheric pressure.
Celsius is the everyday temperature scale in most countries, on weather forecasts, and in science alongside kelvin.
Frequently asked questions
How do I convert kelvin to celsius?
Subtract 273.15 from kelvin to get Celsius. The formula is
°C = K − 273.15.What is a useful reference point?
273.15 K equals 0 °C (for example, water freezes at 0°C = 32°F = 273.15 K).
Is this Kelvin to Celsius converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.
All kelvin conversions
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