Common Converters
Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin, Rankine and Réaumur temperature scales. Temperature conversion uses affine formulas rather than multiplication because the scales have different zero points.
TEMPERATURE CONVERTER — INSTANT RESULT
All supported units — temperature
| Unit | Symbol | To kelvin (K) | From kelvin (K) |
|---|---|---|---|
| Celsius | °C | see scale formulas (affine conversion) | |
| Fahrenheit | °F | see scale formulas (affine conversion) | |
| Kelvin | K | see scale formulas (affine conversion) | |
| Rankine | °R | see scale formulas (affine conversion) | |
| Réaumur | °Ré | see scale formulas (affine conversion) | |
Popular temperature conversions
Frequently asked questions
What units does this temperature converter support?
It supports 5 units: Celsius (°C), Fahrenheit (°F), Kelvin (K), Rankine (°R), Réaumur (°Ré).
What is the base unit of temperature?
The SI reference unit is the kelvin (K). Every conversion is computed by converting the input to the base unit, then from the base unit to the target unit, so chained precision is preserved.
Is this converter accurate?
Yes. Conversion factors use exact legal definitions where they exist (for example 1 in = 25.4 mm exactly) and CODATA/ISO constants otherwise. Results are shown to up to 10 significant figures.