Convert Celsius to Kelvin (C to K)
Instantly convert celsius to kelvin with this free online converter. Type a value below and the result updates in real time. All calculations run in your browser, nothing is sent to a server.
Celsius to Kelvin Formula
K = C + 273.15
Add 273.15 to the Celsius value.
Common Celsius to Kelvin Conversions
| Celsius (C) | Kelvin (K) |
|---|---|
| -40 C | 233.15 K |
| -20 C | 253.15 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 |
| 50 C | 323.15 K |
| 100 C | 373.15 K |
How to Convert Celsius to Kelvin
- Enter the celsius value in the input field above.
- The kelvin result appears instantly as you type.
- Click the copy button to copy the result to your clipboard.
- To convert in the other direction, click the Swap button or visit the Kelvin to Celsius converter.
Frequently Asked Questions
How many kelvin are in one celsiu?
Use the converter above to find the exact value for any celsius amount.
What is the formula to convert C to K?
The formula is: K = C + 273.15. Add 273.15 to the Celsius value.
How do I convert kelvin back to celsius?
Use our reverse converter: Kelvin to Celsius. You can also click the "Swap" button above the converter.
Is this converter accurate?
Yes. This converter uses the standard conversion factor and handles up to 8 decimal places of precision. All calculations run instantly in your browser with no rounding shortcuts.
Do I need to sign up to use this converter?
No. This converter is completely free with no signup, no account, and no usage limits. Your data never leaves your browser.
About This Tool
- Tool
- FreeToolPark Celsius to Kelvin Converter
- Type
- Free online tool, no signup required
- Domain Expertise
- Unit conversion, measurement systems, data format conversion
- Privacy
- 100% client-side, no data stored
- Description
- Free celsius to kelvin converter. Instantly convert C to K with a reference table of common values. No signup, runs in your browser.
Cite This Tool
FreeToolPark. "Celsius to Kelvin Converter." FreeToolPark, 2026, www.freetoolpark.com/tools/convert/c-to-k. Accessed April 14, 2026.