Celsius ↔ Kelvin
Convert between °C and K
Celsius ↔ Kelvin
Quick Facts
- •0 K = −273.15°C (absolute zero)
- •273.15 K = 0°C
- •Water boils at 373.15 K
Celsius and Kelvin
Kelvin is the SI base unit of temperature, used in science and engineering. 0 K (−273.15°C) is absolute zero — the lowest possible temperature. To convert: K = °C + 273.15. Room temperature (22°C) is about 295 K.
How to convert Celsius to Kelvin
Celsius and Kelvin are related by a linear formula with a constant offset, so you cannot simply multiply. Apply the full formula below.
Formula
Kelvin = (Celsius × 1) + 273.15
Worked example
Convert 10 °C to K: 10 °C = 283.15 K.
Celsius to Kelvin reference table
Use this quick lookup for common celsius to kelvin values.
| Celsius (°C) | Kelvin (K) |
|---|---|
| 1 °C | 274.15 K |
| 2 °C | 275.15 K |
| 5 °C | 278.15 K |
| 10 °C | 283.15 K |
| 20 °C | 293.15 K |
| 25 °C | 298.15 K |
| 50 °C | 323.15 K |
| 75 °C | 348.15 K |
| 100 °C | 373.15 K |
| 250 °C | 523.15 K |
Frequently asked questions
What is the formula to convert Celsius to Kelvin?
Apply the linear formula Kelvin = (Celsius × 1) + 273.15. For example, 10 °C equals 283.15 K.
How many kelvin are in 1 celsiu?
1 °C equals 274.15 K.
How do I convert kelvin back to celsius?
Use the converter above and enter the value in the Kelvin field.
Is this Celsius to Kelvin converter accurate?
Yes. Conversions use the internationally accepted ratio for celsius and kelvin and are calculated to 2 decimal places in your browser.
What is 10 °C in K?
10 °C equals 283.15 K.
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This calculator is for educational and reference purposes only. Always verify critical calculations independently.