Convert Kelvin (K) to Celsius (°C) instantly. Enter any value and get the result immediately.
K → °C Converter
| Kelvin (K) | Celsius (°C) |
|---|---|
| 0.1 K | -273.05 °C |
| 0.5 K | -272.65 °C |
| 1 K | -272.15 °C |
| 2 K | -271.15 °C |
| 5 K | -268.15 °C |
| 10 K | -263.15 °C |
| 20 K | -253.15 °C |
| 50 K | -223.15 °C |
| 100 K | -173.15 °C |
| 200 K | -73.15 °C |
| 500 K | 226.85 °C |
| 1000 K | 726.85 °C |
| 5000 K | 4726.85 °C |
| 10000 K | 9726.85 °C |
Converting Kelvin to Celsius is very simple — just subtract 273.15:
Examples:
Kelvin (K) is the SI base unit of temperature — the official scientific standard used worldwide. Named after British physicist Lord Kelvin (William Thomson), it is an absolute temperature scale that starts at absolute zero (0 K) — the coldest possible temperature in the universe where all atomic and molecular motion stops completely.
Important: Kelvin does not use the degree symbol (°). It is written simply as "K", not "°K". This distinguishes it from Celsius and Fahrenheit which are relative scales.
Celsius (°C) is the most widely used temperature scale in daily life worldwide. Developed by Swedish astronomer Anders Celsius in 1742, it is part of the metric system. Its two reference points are: 0°C (freezing point of water) and 100°C (boiling point of water) at standard atmospheric pressure.
| Kelvin (K) | Celsius (°C) | Reference Point |
|---|---|---|
| 0 K | -273.15 °C | Absolute zero |
| 4 K | -269.15 °C | Liquid helium temperature |
| 77 K | -196.15 °C | Liquid nitrogen temperature |
| 183.95 K | -89.2 °C | Coldest recorded on Earth |
| 255.37 K | -17.78 °C | 0°F (Fahrenheit zero) |
| 273.15 K | 0 °C | Freezing point of water |
| 293.15 K | 20 °C | Room temperature |
| 310.15 K | 37 °C | Human body temperature |
| 373.15 K | 100 °C | Boiling point of water |
| 1273.15 K | 1000 °C | Molten lava |
| 5778 K | 5504.85 °C | Surface of the Sun |
| Feature | Kelvin (K) | Celsius (°C) |
|---|---|---|
| Zero point | Absolute zero | Freezing point of water |
| Degree symbol | No (just K) | Yes (°C) |
| Can be negative? | No | Yes |
| Freezing point of water | 273.15 K | 0°C |
| Boiling point of water | 373.15 K | 100°C |
| Used in | Science worldwide | Daily life worldwide |
The formula is: °C = K − 273.15. Subtract 273.15 from the Kelvin value. Example: 300 K − 273.15 = 26.85°C.
0 K = -273.15°C. This is absolute zero — the theoretically coldest possible temperature where all molecular motion stops.
273.15 K = 0°C. This is the freezing point of water. Formula: 273.15 − 273.15 = 0°C.
373.15 K = 100°C. This is the boiling point of water at sea level. Formula: 373.15 − 273.15 = 100°C.
310.15 K = 37°C. This is the normal human body temperature — a commonly used reference in biology and medicine.
No. Kelvin cannot be negative because it starts at absolute zero (0 K) — the coldest possible temperature. Any Kelvin value below 0 is physically impossible in classical thermodynamics.