Celsius to Fahrenheit Converter
Enter a value below to convert Celsius to Fahrenheit - the formula is °F = °C × 9/5 + 32, so 0 °C is 32 °F and 100 °C is 212 °F. For the reverse, use our Fahrenheit to Celsius converter.
°F = °C × 9/5 + 32, so 1 °C = 33.8 °F. Convert Celsius to Fahrenheit. Need the reverse? See Fahrenheit to Celsius.
Celsius
- Definition
- The degree Celsius (symbol: °C) is the unit of the Celsius temperature scale, on which water freezes at 0 °C and boils at 100 °C at standard atmospheric pressure. One degree Celsius is the same size as one kelvin, and the two scales are offset by 273.15 (0 °C = 273.15 K).
- History / origin
- The scale was proposed by the Swedish astronomer Anders Celsius in 1742. His original version was inverted - 0 for boiling and 100 for freezing - and was later flipped to today's orientation. It was long called "centigrade" before "degree Celsius" became the official name in 1948.
- Current use
- Celsius is the everyday temperature unit in almost every country and the standard for weather, cooking, medicine, and science worldwide, with the notable exception of the United States, which uses Fahrenheit for daily life.
Fahrenheit
- Definition
- The degree Fahrenheit (symbol: °F) is the unit of the Fahrenheit temperature scale, on which water freezes at 32 °F and boils at 212 °F at standard pressure. The 180-degree span between those points makes each Fahrenheit degree exactly 5/9 of a Celsius degree.
- History / origin
- The scale was devised by the physicist Daniel Gabriel Fahrenheit in 1724. He set 0 °F using a freezing brine mixture and originally pegged the human body near 96 °F; the scale was later re-fixed to the freezing and boiling points of water at 32 °F and 212 °F.
- Current use
- Fahrenheit remains the primary scale for weather, cooking, and body temperature in the United States and a few associated territories. Most of the rest of the world uses Celsius, so converting between the two is a frequent everyday task.
Celsius to Fahrenheit conversion table
| Celsius [°C] | Fahrenheit [°F] |
|---|---|
| -40 °C | -40 °F |
| -30 °C | -22 °F |
| -20 °C | -4 °F |
| -10 °C | 14 °F |
| 0 °C | 32 °F |
| 10 °C | 50 °F |
| 20 °C | 68 °F |
| 30 °C | 86 °F |
| 37 °C | 98.6 °F |
| 40 °C | 104 °F |
| 50 °C | 122 °F |
| 100 °C | 212 °F |
Popular Celsius to Fahrenheit conversions
Everyday weather, body, and oven temperatures in Fahrenheit, rounded to two decimals - the Celsius values people look up most.
| Celsius [°C] | Fahrenheit [°F] |
|---|---|
| 0 °C | 32 °F |
| 10 °C | 50 °F |
| 15 °C | 59 °F |
| 20 °C | 68 °F |
| 25 °C | 77 °F |
| 30 °C | 86 °F |
| 35 °C | 95 °F |
| 37 °C | 98.60 °F |
| 38 °C | 100.40 °F |
| 40 °C | 104 °F |
| 180 °C | 356 °F |
| 200 °C | 392 °F |
How to convert Celsius to Fahrenheit
To convert Celsius to Fahrenheit, multiply the temperature by 9/5 (1.8) and add 32. Temperature is a non-linear conversion: the scales have different zero points, so you cannot use a single multiplier - the 32-degree offset must be added after scaling.
°F = °C × 9/5 + 32 = °C × 1.8 + 32
0 °C = 32 °F · 100 °C = 212 °F · -40 °C = -40 °F
Example. To convert 20 °C to Fahrenheit, scale by 1.8 and add 32: 20 °C = 20 × 1.8 + 32 = 68 °F. Body temperature is 37 °C = 37 × 1.8 + 32 = 98.6 °F.
When you need to convert Celsius to Fahrenheit
Celsius-to-Fahrenheit conversion comes up whenever a metric temperature has to be read on the US scale. Common cases:
- Reading a weather forecast given in Celsius when you are used to Fahrenheit, or traveling to the United States.
- Following a recipe with oven temperatures in Celsius on a Fahrenheit-marked oven dial.
- Checking a body temperature taken in Celsius against the familiar 98.6 °F benchmark.
- Setting a thermostat or appliance whose display uses Fahrenheit from a value quoted in Celsius.
- Reading scientific or product data sheets in Celsius for an American audience that expects Fahrenheit.
Frequently asked questions
How do I convert Celsius to Fahrenheit?
Multiply the Celsius temperature by 9/5 (1.8) and then add 32. For example, 20 °C = 20 × 1.8 + 32 = 68 °F. The full formula is °F = °C × 9/5 + 32.
How many degrees Fahrenheit is 1 degree Celsius?
A reading of 1 °C equals 33.8 °F. There is no single multiplier, because the scales do not share a zero point - you must add the 32-degree offset after scaling. A change of 1 °C does equal a change of 1.8 °F, though.
Is 0 degrees Celsius equal to 32 degrees Fahrenheit?
Yes. Water freezes at 0 °C, which is exactly 32 °F. That 32-degree gap is the offset built into the conversion formula.
What is 37 degrees Celsius in Fahrenheit?
37 °C equals 98.6 °F, the figure usually quoted as normal human body temperature: 37 × 1.8 + 32 = 98.6 °F.
What is 180 degrees Celsius in Fahrenheit?
180 °C equals 356 °F. This is a common moderate oven setting: 180 × 1.8 + 32 = 356 °F.
What is 100 degrees Celsius in Fahrenheit?
100 °C equals 212 °F. That is the boiling point of water at sea level: 100 × 1.8 + 32 = 212 °F.
Why is -40 the same in Celsius and Fahrenheit?
At -40 the two scales cross: -40 °C = -40 °F. Solving °C × 1.8 + 32 = °C gives exactly -40, the one temperature where both scales read the same number.
How do I convert Celsius to Fahrenheit in my head?
Double the Celsius value and add about 30 for a quick estimate. For example, 20 °C is roughly 40 + 30 = 70 °F, and the exact value is 68 °F.
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