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.
Fahrenheit is a unit of temperature.
The freezing/melting point of water is about 32 °F at a pressure of 1 atmosphere.
The symbol of Fahrenheit degrees is °F.
0 degrees Celsius is equal to 32 degrees Fahrenheit:
0 °C = 32 °F
The temperature in degrees Fahrenheit (°F) is equal to the temperature in degrees Celsius (°C) times 9/5 plus 32:
Fahrenheit = Celsius × 9/5 + 32
or
Fahrenheit = Celsius × 1.8 + 32
Convert 20 degrees Celsius to degrees Fahrenheit:
Fahrenheit = 20°C × 9/5 + 32 = 68 °F
| Celsius (°C) | Fahrenheit (°F) | Description |
|---|---|---|
| -273.15 °C | -459.67 °F | absolute zero temperature |
| -50 °C | -58.0 °F | |
| -40 °C | -40.0 °F | |
| -30 °C | -22.0 °F | |
| -20 °C | -4.0 °F | |
| -10 °C | 14.0 °F | |
| -9 °C | 15.8 °F | |
| -8 °C | 17.6 °F | |
| -7 °C | 19.4 °F | |
| -6 °C | 21.2 °F | |
| -5 °C | 23.0 °F | |
| -4 °C | 24.8 °F | |
| -3 °C | 26.6 °F | |
| -2 °C | 28.4 °F | |
| -1 °C | 30.2 °F | |
| 0 °C | 32.0 °F | freezing point of water |
| 1 °C | 33.8 °F | |
| 2 °C | 35.6 °F | |
| 3 °C | 37.4 °F | |
| 4 °C | 39.2 °F | |
| 5 °C | 41.0 °F | |
| 6 °C | 42.8 °F | |
| 7 °C | 44.6 °F | |
| 8 °C | 46.4 °F | |
| 9 °C | 48.2 °F | |
| 10 °C | 50.0 °F | |
| 11 °C | 51.8 °F | |
| 12 °C | 53.6 °F | |
| 13 °C | 55.4 °F | |
| 14 °C | 57.2 °F | |
| 15 °C | 59.0 °F | |
| 16 °C | 60.8 °F | |
| 17 °C | 62.6 °F | |
| 18 °C | 64.4 °F | |
| 19 °C | 66.2 °F | |
| 20 °C | 68.0 °F | |
| 21 °C | 69.8 °F | room temperature |
| 22 °C | 71.6 °F | |
| 23 °C | 73.4 °F | |
| 24 °C | 75.2 °F | |
| 25 °C | 77.0 °F | |
| 26 °C | 78.8 °F | |
| 27 °C | 80.6 °F | |
| 28 °C | 82.4 °F | |
| 29 °C | 84.2 °F | |
| 30 °C | 86.0 °F | |
| 31 °C | 87.8 °F | |
| 32 °C | 89.6 °F | |
| 33 °C | 91.4 °F | |
| 34 °C | 93.2 °F | |
| 35 °C | 95.0 °F | |
| 36 °C | 96.8 °F | |
| 37 °C | 98.6 °F | average body temperature |
| 38 °C | 100.4 °F | |
| 39 °C | 102.2 °F | |
| 40 °C | 104.0 °F | |
| 50 °C | 122.0 °F | |
| 60 °C | 140.0 °F | |
| 70 °C | 158.0 °F | |
| 80 °C | 176.0 °F | |
| 90 °C | 194.0 °F | |
| 100 °C | 212.0 °F | boiling point of water |
| 200 °C | 392.0 °F | |
| 300 °C | 572.0 °F | |
| 400 °C | 752.0 °F | |
| 500 °C | 932.0 °F | |
| 600 °C | 1112.0 °F | |
| 700 °C | 1292.0 °F | |
| 800 °C | 1472.0 °F | |
| 900 °C | 1652.0 °F | |
| 1000 °C | 1832.0 °F |
