Temperature unit converter
Convert between °C, °F, K, °R and more, with formulas and tables.
Popular temperature conversions
Conversion matrix
Each cell is how many of the column unit equal 1 of the row unit. Tap a value for the full table.
| °C | °F | K | °R | |
|---|---|---|---|---|
| 1 °C | 1 | 33.8 | 274.15 | 493.47 |
| 1 °F | -17.2222 | 1 | 255.928 | 460.67 |
| 1 K | -272.15 | -457.87 | 1 | 1.8 |
| 1 °R | -272.594 | -458.67 | 0.555556 | 1 |
The units
- °C (degrees Celsius): Metric everyday and process temperature.
- °F (degrees Fahrenheit): US everyday and process temperature.
- K (kelvin): The SI absolute temperature scale; zero is absolute zero.
- °R (degrees Rankine): Absolute Fahrenheit scale used in US thermodynamics.
Temperature scales have different zero points, so these conversions add or subtract an offset, not just multiply. A temperature difference converts differently: a change of 1 °C equals a change of 1 K and 1.8 °F.