Celsius to Kelvin Converter
Convert celsius to kelvin online. 100 °C = 373.15 K. Free, instant Celsius-to-Kelvin converter. Works both ways with a formula and reference table.
Celsius → Kelvin
1 °C = 274.15 K
Celsius to Kelvin conversion table
| Celsius (°C) | Kelvin (K) |
|---|---|
| 1 °C | 274.15 K |
| 2 °C | 275.15 K |
| 5 °C | 278.15 K |
| 10 °C | 283.15 K |
| 25 °C | 298.15 K |
| 50 °C | 323.15 K |
| 100 °C | 373.15 K |
- Instant, live Celsius ↔ Kelvin conversion
- Accurate to the exact formula
- Converts in both directions
- Reference table of common values
- 100% private — runs entirely in your browser
- Free, no sign-up, works offline
How to use the Celsius to Kelvin Converter
- 1
Type the number of celsius in the first box.
- 2
Read the equivalent value in kelvin instantly in the second box.
- 3
Or type a Kelvin value to convert back to celsius — it works both ways.
- 4
Copy the result, or check the reference table for common conversions.
About the Celsius to Kelvin Converter
The ByteTools Celsius to Kelvin Converter turns any Celsius temperature into Kelvin instantly using the standard conversion formula, K = °C + 273.15. Type a value and the result updates live, with the formula and a quick reference table shown below.
Temperature conversions are essential for weather, cooking, science and travel between countries that use Celsius and Fahrenheit. Everything is calculated locally in your browser — nothing is uploaded — so it is fast, private and works offline. Enter a number in either box to convert both ways, and use the table for common Celsius-to-Kelvin values at a glance.
Frequently asked questions
What is the formula to convert Celsius to Kelvin?
Use K = °C + 273.15. Enter any Celsius value and this tool applies the formula instantly. For example, 100 °C equals 373.15 K.
What is 0 °C in Kelvin?
Zero °C equals 273.15 K. Temperature scales have different zero points, so the conversion is an offset formula rather than a simple multiplication.
How do I convert Kelvin back to Celsius?
Apply the inverse formula, or simply use our Kelvin to Celsius converter for the reverse direction. Both pages share the same exact conversion so the numbers always match.
Is this Celsius to Kelvin converter free and private?
Yes. The conversion runs entirely in your browser with JavaScript — nothing you type is uploaded, logged or stored. It is completely free, needs no sign-up and keeps working offline once loaded.