Celsius to Kelvin (°C → K) Conversion
to
Celsius
°C
Result
Calculation steps
About this conversion
Intro
This page converts celsius (°C) to kelvin (K). Use it when your temperature is given in celsius and you need the equivalent in kelvin for reports, engineering work, or everyday reference.
Definition
Temperature measures how hot or cold something is and is used in weather, cooking, manufacturing, HVAC, chemistry, and engineering. Quick context on kelvin: Kelvin (K) is the SI thermodynamic temperature unit used in science and engineering. It starts at absolute zero, so it never uses negative values for physically possible temperatures.
Formula: Celsius to Kelvin
K = C + 273.15
Add 273.15 to convert Celsius to Kelvin.
Worked examples
Example 1: 0 °C → 273.15 K
- Start with 0 °C.
- Apply the conversion formula.
- Result: 273.15 K.
Example 2: 25 °C → 298.15 K
- Start with 25 °C.
- Apply the conversion formula.
- Result: 298.15 K.
Example 3: 100 °C → 373.15 K
- Start with 100 °C.
- Apply the conversion formula.
- Result: 373.15 K.
Quick reference table
| From | To |
|---|---|
| -40 °C | 233.15 K |
| 0 °C | 273.15 K |
| 10 °C | 283.15 K |
| 20 °C | 293.15 K |
| 25 °C | 298.15 K |
| 37 °C | 310.15 K |
| 50 °C | 323.15 K |
| 100 °C | 373.15 K |
FAQs
How do I convert Celsius to Kelvin?
Use the formula shown above and enter your value in the converter. It will calculate the equivalent in Kelvin (K) instantly.
What is Kelvin (K) used for?
Kelvin (K) is the SI thermodynamic temperature unit used in science and engineering. It starts at absolute zero, so it never uses negative values for physically possible temperatures.
Why does temperature conversion use “+32” or “+459.67”?
Temperature scales can have different zero points. Fahrenheit and Rankine use offsets relative to Celsius/Kelvin, so conversions include an addition/subtraction step.
Is Centigrade the same as Celsius?
Yes. Centigrade is a historical/alternate name for the Celsius scale, and the numeric values are the same.
Which unit is absolute: Celsius/Fahrenheit or Rankine?
Rankine is an absolute scale (like Kelvin). Celsius and Fahrenheit are relative scales that don’t start at absolute zero.
Do these conversions depend on pressure (like boiling point)?
The unit conversion itself does not depend on pressure. However, physical phenomena like boiling/freezing points can change with pressure—this tool only converts units.