Degrees Celsius to Kelvin
1 degree Celsius = 274.15 kelvin · 1 K = -272.15 °C
1 degree Celsius = 274.15 kelvin
How it’s calculated
K = °C + 273.15
- Temperature scales have different zero points, so the conversion adds or subtracts an offset as well as scaling.
- 1 °C = 274.15 K · 1 K = -272.15 °C
Show worked solutionFactor, unit cancellation and rounding, step by step
Use the exact scale definitions
Temperature scales have different zero points, so this is not a single multiplication: it adds or subtracts an offset as well as scaling. The definitions are exact (0 °C = 273.15 K; 1 °F = 5/9 K; absolute zero = −459.67 °F). Source: BIPM SI Brochure (9th ed.).
Step 1: add the offset
Add 273.15 (0 °C = 273.15 K exactly).
Round the answer
Rounded to 5 significant figures.
Answer: 274.15 K · Temperature readings include an offset; for a temperature difference use only the scale factor.
1 °C in other units
Batch convert °C → K
- 1 °C = 274.15 K
- 5 °C = 278.15 K
- 10 °C = 283.15 K
- 25 °C = 298.15 K
Quick examples
- 1 degree Celsius = 274.15 kelvin
- 5 degrees Celsius = 278.15 kelvin
- 10 degrees Celsius = 283.15 kelvin
- 25 degrees Celsius = 298.15 kelvin
- 100 degrees Celsius = 373.15 kelvin
About these units
Degree Celsius (°C)
SI (metric)
T(°C) = T(K) − 273.15.
Source: BIPM SI Brochure (9th ed.)
Kelvin (K)
SI (metric)
SI base unit of thermodynamic temperature; 0 K is absolute zero.
Source: BIPM SI Brochure (9th ed.)
Degrees Celsius to kelvin conversion table
| 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 |
| 60 °C | 333.15 K |
| 80 °C | 353.15 K |
| 100 °C | 373.15 K |
| 150 °C | 423.15 K |
| 180 °C | 453.15 K |
| 200 °C | 473.15 K |
Related conversions
Frequently asked questions
How do I convert degrees Celsius to kelvin?
Use K = °C + 273.15. Temperature scales have different zero points, so the conversion adds or subtracts an offset as well as scaling.
How many kelvin are in 1 degree Celsius?
1 degree Celsius (°C) equals 274.15 kelvin (K).
How many degrees Celsius are in 1 kelvin?
1 kelvin (K) equals -272.15 degrees Celsius (°C).
What is 10 °C in K?
10 degrees Celsius = 283.15 kelvin.
What is a degree Celsius?
T(°C) = T(K) − 273.15.
What is a kelvin?
SI base unit of thermodynamic temperature; 0 K is absolute zero.
Formula: K = °C + 273.15. Factors last reviewed 2026-10-27.