Celsius to Kelvin Converter
Kelvin is the SI unit of temperature — the scale of physics labs, chemistry, and thermodynamics — while Celsius is the everyday scale most people actually read. Converting Celsius to Kelvin is routine in science classes and engineering: gas laws, material specs, and experiment protocols all demand kelvin. The conversion is the simplest in thermometry: K = °C + 273.15, because the two scales share the same degree size and differ only by the offset of absolute zero. The converter above handles it instantly, the table lists lab-relevant values, and the FAQs explain absolute zero and why kelvin has no degree symbol.
Celsius to Kelvin Calculator
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Quick Reference Table
| Celsius (°C) | Kelvin (K) |
|---|---|
| 1 | 274.15 |
| 2 | 275.15 |
| 3 | 276.15 |
| 4 | 277.15 |
| 5 | 278.15 |
| 6 | 279.15 |
| 7 | 280.15 |
| 8 | 281.15 |
| 9 | 282.15 |
| 10 | 283.15 |
| -273.15 | 0 |
| 0 | 273.15 |
| 100 | 373.15 |
| 1000 | 1273.15 |
Frequently Asked Questions
How many kelvin are in 20 celsius?
20 celsius = 293.15 kelvin. Just apply the conversion to any value with the converter above.
What is the formula to convert celsius to kelvin?
To convert celsius to kelvin, add 273.15 to the Celsius temperature. In short: K = °C + 273.15.
What is absolute zero in Celsius?
Absolute zero is −273.15°C, which equals 0 K — the coldest temperature physically possible, where molecular motion stops. Enter -273.15 in the converter above and watch it return exactly 0 K.
How do I convert kelvin back to celsius?
Simply reverse the math: to go from kelvin to celsius, use °C = K − 273.15. Or use our dedicated Kelvin to Celsius converter.