Temperature Converter
Convert temperature between Celsius, Fahrenheit, and Kelvin for weather, cooking, and science.
Learn how it works: How to Convert Celsius to FahrenheitHow the temperature converter works
Type a reading, choose the scale it is on, and select the scale you want it in. The result appears straight away, and the swap button turns a Celsius-to-Fahrenheit conversion into Fahrenheit-to-Celsius without retyping.
Temperature does not scale by a single multiplier the way distance or weight does, because each scale starts counting from a different point. This tool handles the shift for you, so a fever check or an oven setting comes out right every time.
Reference temperatures across the scales
| Water freezes | 0 °C / 32 °F / 273.15 K |
| Room temperature | 20 °C / 68 °F |
| Body temperature | 37 °C / 98.6 °F |
| Water boils | 100 °C / 212 °F / 373.15 K |
| Absolute zero | −273.15 °C / −459.67 °F / 0 K |
Three scales and where each is used
Celsius anchors its zero at the freezing point of water and 100 at the boiling point, which makes it the everyday scale for most of the world and the standard for weather reports outside the United States.
Fahrenheit remains the household scale in the United States, putting freezing at 32 and boiling at 212. Kelvin is the scientist's choice: it shares the size of a Celsius degree but begins at absolute zero, the point where molecular motion stops, so it never goes negative. That floor is why this converter declines to drop below 0 K.
Frequently asked questions
- How do I convert Celsius to Fahrenheit?
- Multiply the Celsius value by 9/5 and add 32. So 20 °C becomes 68 °F. A quick estimate is to double the Celsius figure and add 30, which lands close for everyday temperatures.
- What is normal body temperature in Fahrenheit?
- Around 98.6 °F, which is 37 °C. Normal readings vary a little by person and time of day, so anything from roughly 97 to 99 °F is generally considered typical.
- Why does Kelvin not use a degree symbol?
- Kelvin is measured as an absolute count from zero rather than degrees above a reference point, so values are written as plain numbers followed by K, such as 300 K.
- What is absolute zero?
- Absolute zero is the coldest temperature possible, where particle motion reaches its minimum. It equals 0 K, −273.15 °C, or −459.67 °F. No reading can fall below it, which is why the converter blocks colder values.
- What oven temperature is 180 °C in Fahrenheit?
- 180 °C is 356 °F, a common moderate baking heat. Many recipes round this to 350 °F, which is 177 °C, so the small gap rarely affects the result.