Convert Celsius to Kelvin
Use this free converter to change celsius (°C) into kelvin (K). Celsius and kelvin both measure temperature. As a quick reference, 1 °C equals 274.15 K, and 1 K equals -272.15 °C.
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Kelvin (K)
274.15
1 °C = 274.15 K
Temperature conversion table
| Celsius | Kelvin |
|---|---|
| 0.01 | 273.16 |
| 0.1 | 273.25 |
| 0.5 | 273.65 |
| 1 | 274.15 |
| 2 | 275.15 |
| 3 | 276.15 |
| 5 | 278.15 |
| 10 | 283.15 |
| 20 | 293.15 |
| 25 | 298.15 |
| 50 | 323.15 |
| 100 | 373.15 |
| 1,000 | 1273.15 |
How to convert Celsius to Kelvin
K = °C + 273.15
- Enter the number of celsius you want to convert.
- The converter instantly shows the equivalent value in kelvin.
- For example, 25 °C = 298.15 K using the formula above.
- Use the swap button to reverse the conversion (kelvin to celsius).
About these units
Celsius (°C)
- Definition
- The degree Celsius (°C) is a metric temperature unit where water freezes at 0° and boils at 100° at standard pressure.
- History
- Proposed by Swedish astronomer Anders Celsius in 1742 (originally inverted), the scale was later flipped to its modern form.
- Current use
- Celsius is the everyday temperature scale across most of the world for weather, cooking, and medicine.
Kelvin (K)
- Definition
- The kelvin (K) is the SI base unit of temperature, starting at absolute zero with the same degree size as Celsius.
- History
- Proposed by William Thomson (Lord Kelvin) in 1848 and redefined in 2019 by fixing the Boltzmann constant.
- Current use
- Kelvin is used throughout science and engineering, especially in physics, chemistry, and astronomy.
Frequently asked questions
How many kelvin are in a celsius?
There are 274.15 K in 1 °C. To convert, apply the temperature formula shown above.
How do I convert celsius to kelvin?
K = °C + 273.15 For example, 10 °C = 283.15 K.
Is this celsius-to-kelvin converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Celsius to other temperature units
| Unit | 1 Celsius equals |
|---|---|
| Fahrenheit (°F) | 33.8 °F |
| Kelvin (K) | 274.15 K |
| Rankine (°R) | 493.47 °R |