Degrees Celsius to Kelvin Converter
Convert degrees Celsius to kelvin instantly with this free degrees Celsius to kelvin converter. Enter any value to get an accurate temperature conversion, plus the formula, the conversion factor and a full reference table.
What is 1 degree Celsius in kelvin?
1 degree Celsius is equal to exactly 274.15 kelvin.
1°C → 274.15K using K = °C + 273.15
1 degree Celsius = 274.15 kelvin
Degrees Celsius to Kelvin formula
K = °C + 273.15
Temperature scales use an offset as well as a ratio, so degrees Celsius and kelvin cannot be converted by multiplication alone.
Worked examples
- -20 degrees Celsius = 253.15 kelvin — -20°C → 253.15K using K = °C + 273.15
- 10 degrees Celsius = 283.15 kelvin — 10°C → 283.15K using K = °C + 273.15
- 30 degrees Celsius = 303.15 kelvin — 30°C → 303.15K using K = °C + 273.15
Degrees Celsius to Kelvin conversion table
Every value below is calculated with the exact conversion factor and rounded for display.
| Degrees Celsius (°C) | Kelvin (K) |
|---|---|
| -40 °C | 233.15 K |
| -20 °C | 253.15 K |
| -10 °C | 263.15 K |
| 0 °C | 273.15 K |
| 5 °C | 278.15 K |
| 10 °C | 283.15 K |
| 15 °C | 288.15 K |
| 20 °C | 293.15 K |
| 25 °C | 298.15 K |
| 30 °C | 303.15 K |
| 35 °C | 308.15 K |
| 37 °C | 310.15 K |
| 40 °C | 313.15 K |
| 50 °C | 323.15 K |
| 75 °C | 348.15 K |
| 100 °C | 373.15 K |
When you need to convert degrees Celsius to kelvin
- Setting an oven from a recipe written in the other scale.
- Reading a weather forecast while travelling.
- Interpreting a thermostat, fever reading or industrial spec sheet.
Getting a feel for the scale
A converted number is easier to trust when you can picture it. These reference points let you sanity-check the result at a glance.
Degree Celsius (°C)
- Water freezes at 0 °C and boils at 100 °C
- Room temperature is about 21 °C
Kelvin (K)
- 0 K is absolute zero
- Room temperature is about 294 K
Common mistakes to avoid
- Multiplying without applying the offset. Temperature scales do not share a zero point, so a plain conversion factor gives the wrong answer.
- Converting a temperature difference the same way as a temperature. A change of 10 °C is a change of 18 °F, not 50 °F.
- Rounding too early. Convert first at full precision, then round the final answer to the precision the task actually needs.
How precise does the answer need to be?
For weather and cooking, one decimal place is more than enough. Clinical and laboratory readings normally need 0.1° resolution, and scientific work should carry the full value through the calculation before rounding.
How these units are defined
- Degree Celsius (°C): Water freezes at 0 °C and boils at 100 °C at sea level. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
- Kelvin (K): The SI base unit of temperature, starting at absolute zero. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
Related conversions
Frequently asked questions
- What is 1 degree Celsius in kelvin?
- 1 degree Celsius is equal to 274.15 kelvin.
- How many degrees Celsius are in one kelvin?
- There are -272.15 degrees Celsius in 1 kelvin.
- How do you convert degrees Celsius to kelvin?
- Use the formula K = °C + 273.15.
- What is 10 degrees Celsius in kelvin?
- 10 degrees Celsius is 283.15 kelvin. 10°C → 283.15K using K = °C + 273.15.