Convert Celsius to Kelvin
Degrees Celsius to kelvin. Enter a value to convert, or use the Celsius to Kelvin chart further down the page.
Degrees Celsius and kelvin are measured on scales with different zero points, so the conversion needs a formula rather than a single factor.
How to convert Celsius to Kelvin
Degrees Celsius and kelvin use different zero points, so you cannot convert them with a single multiplication. Apply the formula K = °C + 273.15 instead.
K = °C + 273.15
Worked example
Convert 20 °C to kelvin:
20 °C = 293.15 K
Celsius to Kelvin conversion chart
Use this Celsius to Kelvin table for quick reference without typing anything.
| degrees Celsius (°C) | kelvin (K) |
|---|---|
| -40 °C | 233.15 K |
| -30 °C | 243.15 K |
| -20 °C | 253.15 K |
| -10 °C | 263.15 K |
| 0 °C | 273.15 K |
| 10 °C | 283.15 K |
| 20 °C | 293.15 K |
| 25 °C | 298.15 K |
| 30 °C | 303.15 K |
| 37 °C | 310.15 K |
| 40 °C | 313.15 K |
| 50 °C | 323.15 K |
| 100 °C | 373.15 K |
What is a degree Celsius?
The Celsius scale places 0 °C at the freezing point of water and 100 °C at its boiling point at standard pressure. It is the everyday temperature scale in almost every country.
What is a kelvin?
The kelvin is the SI base unit of temperature. It starts at absolute zero and uses the same degree size as Celsius, so 0 K equals −273.15 °C.
Frequently asked questions
How many Kelvin are in a degree Celsius?
Degrees Celsius and kelvin have no fixed ratio, because the two scales start at different zero points. Convert between them with K = °C + 273.15 instead of multiplying by a single number.
How do you convert Celsius to Kelvin?
Degrees Celsius and kelvin use different zero points, so you cannot convert them with a single multiplication. Apply the formula K = °C + 273.15 instead.
What is 10 Celsius in Kelvin?
10 Celsius equals 283.15 Kelvin. The conversion chart on this page lists the other values people look up most often.
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