Convert Celsius, Fahrenheit and Kelvin instantly
Temperature describes how hot or cold something is. In daily life, the most common scales are Celsius and Fahrenheit, while Kelvin is used heavily in science and engineering.
For recipes and oven settings, the cooking temperature converter may be more useful than the general temperature converter.
This free temperature converter helps switch between Celsius, Fahrenheit and Kelvin in seconds. It is useful for weather readings, schoolwork, science, engineering, cooking and everyday conversions.
Many people need quick answers to questions like what is 100°F in Celsius, what is 37°C in Fahrenheit, or how to convert Kelvin to Celsius. This page covers the key formulas and common reference points as well as providing the instant calculator above.
The most common formulas are:
| Conversion | Formula |
|---|---|
| Celsius to Fahrenheit | °F = (°C × 9/5) + 32 |
| Fahrenheit to Celsius | °C = (°F − 32) × 5/9 |
| Celsius to Kelvin | K = °C + 273.15 |
| Kelvin to Celsius | °C = K − 273.15 |
| Fahrenheit to Kelvin | K = (°F − 32) × 5/9 + 273.15 |
| Kelvin to Fahrenheit | °F = (K − 273.15) × 9/5 + 32 |
Some values come up again and again in search and in real life. These are useful anchor points to remember.
| Celsius | Fahrenheit | Kelvin | Meaning |
|---|---|---|---|
| -273.15°C | -459.67°F | 0 K | Absolute zero |
| 0°C | 32°F | 273.15 K | Water freezes |
| 20°C | 68°F | 293.15 K | Typical room temperature |
| 37°C | 98.6°F | 310.15 K | Normal body temperature |
| 100°C | 212°F | 373.15 K | Water boils |
Celsius is the standard scale in most countries, so it is commonly used in weather reports, product labels and science education. Fahrenheit remains common in the United States for weather and household use.
That means people often need to convert between them while travelling, following recipes, reading product instructions or comparing weather forecasts from different countries.
Kelvin is different because it begins at absolute zero, the lowest possible temperature. Because of that, it is used in physics, chemistry and engineering rather than daily life.
Unlike Celsius and Fahrenheit, Kelvin values are written without the degree symbol. For example, 300 K is the correct style, not 300°K.
For additonal conversion needs, try the Length Converter, Weight Converter, Area Converter, Volume Converter, and Cooking Temperature Converter.
Multiply the Celsius value by 9/5, then add 32. For example, 20°C becomes 68°F.
0°C equals 32°F, which is the freezing point of water.
No. Kelvin starts at 0 K, which is absolute zero, so values below that are not valid.
A commonly used reference is 37°C, which equals 98.6°F.