Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin, Rankine, and Réaumur temperature scales.
Celsius°C
0Water freezes at 0°C, boils at 100°C
Fahrenheit°F
32Water freezes at 32°F, boils at 212°F
KelvinK
273.15Absolute zero = 0K, no degree symbol
Rankine°R
491.67Absolute scale using Fahrenheit degrees
Réaumur°Ré
0Historic scale, water boils at 80°Ré
Reference Points
| Point | °C | °F | K |
|---|---|---|---|
| Absolute Zero | -273.15 | -459.67 | 0 |
| Water Freezes | 0 | 32 | 273.15 |
| Body Temp | 37 | 98.6 | 310.15 |
| Water Boils | 100 | 212 | 373.15 |
Temperature Converter
Convert temperatures between all major scales: Celsius, Fahrenheit, Kelvin, Rankine, and Réaumur.
Temperature Scales
- Celsius: Metric scale, water freezes at 0°, boils at 100°
- Fahrenheit: US customary, water freezes at 32°, boils at 212°
- Kelvin: SI base unit, absolute zero = 0K
- Rankine: Absolute scale using Fahrenheit degree size
- Réaumur: Historical scale, water boils at 80°
Fun Facts
- -40° is the same in both Celsius and Fahrenheit
- Kelvin never uses a degree symbol
- Body temperature is 98.6°F or 37°C
Puzzle Uses
Temperature conversions may appear in puzzles involving weather, cooking, science themes, or as a way to encode numbers.