Celsius to Kelvin Conversion Chart
Reference chart converting Celsius (°C) to Kelvin (K). Covers temperatures from absolute zero to common scientific and industrial values.
For a custom value not in this chart, use the interactive Celsius to Kelvin converter.
| Celsius (°C) | Kelvin (K) |
|---|---|
| -273.15 °C | 0 K |
| -200 °C | 73.15 K |
| -100 °C | 173.15 K |
| -40 °C | 233.15 K |
| -20 °C | 253.15 K |
| -10 °C | 263.15 K |
| 0 °C | 273.15 K |
| 10 °C | 283.15 K |
| 20 °C | 293.15 K |
| 25 °C | 298.15 K |
| 37 °C | 310.15 K |
| 50 °C | 323.15 K |
| 100 °C | 373.15 K |
| 150 °C | 423.15 K |
| 200 °C | 473.15 K |
| 300 °C | 573.15 K |
| 500 °C | 773.15 K |
| 1000 °C | 1273.15 K |
Conversion Formula
K = °C + 273.15 °C = K − 273.15 Example: 100°C + 273.15 = 373.15 K (boiling point of water at sea level) Key reference points: Absolute zero: −273.15°C = 0 K Liquid nitrogen: −196°C = 77.15 K Dry ice (CO₂): −78.5°C = 194.65 K Freezing (water): 0°C = 273.15 K Room temperature: 20–22°C = 293–295 K Body temperature: 37°C = 310.15 K Boiling (water): 100°C = 373.15 K Surface of the sun: ~5,500°C ≈ 5,773 K
Frequently Asked Questions
What is 0°C in Kelvin?
0°C + 273.15 = 273.15 K. This is the freezing point of water at standard atmospheric pressure. Kelvin starts at absolute zero (0 K = −273.15°C), so water freezes at 273.15 K.
What is 25°C in Kelvin?
25°C + 273.15 = 298.15 K. This is a standard reference temperature used in chemistry and thermodynamics, often called 'standard temperature' (STP alternatives exist).
What is absolute zero in Celsius?
Absolute zero is 0 K = −273.15°C. It is the lowest possible temperature — the point at which all atomic thermal motion would theoretically cease. It has never been achieved experimentally.
Why is Kelvin used in science instead of Celsius?
Kelvin is an absolute scale starting at the coldest possible temperature (0 K). This makes it essential for thermodynamic calculations where temperatures must never be negative. Gas law formulas like PV=nRT require absolute temperature; using Celsius would give wrong results.
Is the degree size the same for Celsius and Kelvin?
Yes. A difference of 1°C equals a difference of 1 K. The only difference between the scales is where zero is placed: 0°C = 273.15 K. So converting C to K only requires adding 273.15 — no scaling factor is needed.
Related Converters
Related Charts
Related Guides
Need a custom value?
This chart covers common values. For any number, use the interactive converter.
Use the interactive converter →All conversion values are calculated using internationally recognized conversion factors. Results are provided for general informational purposes — verify critical values independently. Read our full disclaimer.