Celsius or centigrade is a unit of temperature.
The freezing/melting point of water is about zero degrees celsius (0 °C) at a pressure of 1 atmosphere.
The boiling point of water is about one hundred degrees celsius (100 °C) at a pressure of 1 atmosphere.
The exact values depend on the water composition (usually the amount of salt) and the air pressure.
Seawater contains salt and the freezing point is reduced below 0 °C.
When boiling water on a mountain above sea level the boiling point is reduced below 100 °C.
The symbol of Celsius degrees is °C.
Kelvin is a unit of temperature.
The freezing/melting point of water is about 273.15K at a pressure of 1 atmosphere.
The symbol of Kelvin unit is K.
0 degrees Celsius is equal to 273.15 Kelvin:
0 °C = 273.15 K
The temperature T in Kelvin (K) is equal to the temperature T in degrees Celsius (°C) plus 273.15:
T(K) = T(°C) + 273.15
Convert 20 degrees Celsius to Kelvin:
T(K) = 20°C + 273.15 = 293.15 K
| Celsius (°C) | Kelvin (K) | Description |
|---|---|---|
| -273.15 °C | 0 K | absolute zero temperature |
| -50 °C | 223.15 K | |
| -40 °C | 233.15 K | |
| -30 °C | 243.15 K | |
| -20 °C | 253.15 K | |
| -10 °C | 263.15 K | |
| 0 °C | 273.15 K | freezing/melting point of water |
| 10 °C | 283.15 K | |
| 20 °C | 293.15 K | |
| 21 °C | 294.15 K | room temperature |
| 30 °C | 303.15 K | |
| 37 °C | 310.15 K | average body temperature |
| 40 °C | 313.15 K | |
| 50 °C | 323.15 K | |
| 60 °C | 333.15 K | |
| 70 °C | 343.15 K | |
| 80 °C | 353.15 K | |
| 90 °C | 363.15 K | |
| 100 °C | 373.15 K | boiling point of water |
| 200 °C | 473.15 K | |
| 300 °C | 573.15 K | |
| 400 °C | 673.15 K | |
| 500 °C | 773.15 K | |
| 600 °C | 873.15 K | |
| 700 °C | 973.15 K | |
| 800 °C | 1073.15 K | |
| 900 °C | 1173.15 K | |
| 1000 °C | 1273.15 K |
