How to convert Celsius to Fahrenheit
Celsius and Fahrenheit are related by a formula rather than a single factor. Recipes, weather apps and medical guidance switch between Celsius and Fahrenheit, and the offset of 32 makes mental conversion easy to get wrong.
Celsius to Fahrenheit conversion table
| Celsius (°C) | Fahrenheit (°F) |
|---|---|
| -40 °C | -40 °F |
| -20 °C | -4 °F |
| -10 °C | 14 °F |
| 0 °C | 32 °F |
| 10 °C | 50 °F |
| 20 °C | 68 °F |
| 25 °C | 77 °F |
| 30 °C | 86 °F |
| 37 °C | 98.6 °F |
| 40 °C | 104 °F |
| 50 °C | 122 °F |
| 100 °C | 212 °F |
About the units
Celsius (°C)
Celsius sets water freezing at 0 °C and boiling at 100 °C at sea level.
Fahrenheit (°F)
Fahrenheit sets water freezing at 32 °F and boiling at 212 °F; it is used in the US.
How to use this converter
- Type the number of Celsius (°C) in the input box.
- The result in Fahrenheit appears instantly — no button needed.
- See the same value in every other temperature unit just below.
- Use “Swap units” to convert Fahrenheit back to Celsius.
When you’ll use the celsius to fahrenheit conversion
A European cake recipe says to bake at 180 °C, but your oven dial is in Fahrenheit. Converting gives 356 °F, so you set the oven to 350 °F, the closest standard setting.
You are traveling and the forecast shows 28 °C. Converting gives about 82 °F, which tells you to pack summer clothes.
💡 For a quick estimate in your head, double it and add 30 (20 °C → about 70 °F; exact 68 °F).
Watch out for these mix-ups
- Multiplying by 1.8 and forgetting to add 32.
- Converting a temperature change with the full formula.
- Assuming 0 °C and 0 °F describe the same temperature.
- Rounding body temperatures too much when it matters.
Tips for better results
- For a temperature change, multiply by 1.8 without adding 32.
- Use common anchors: 0 °C = 32 °F, 20 °C = 68 °F, 37 °C = 98.6 °F.
- Round oven temperatures to the nearest 25 °F setting.
💡 Practical tip: −40 is the one temperature that reads the same in Celsius and Fahrenheit.
Frequently asked questions
How many Fahrenheit are in one celsius?
33.8 °F corresponds to 1 °C. Because this scale uses an offset or an inverse relationship, there is no single multiplication factor — use the formula above.
How do I convert Celsius to Fahrenheit?
Apply the formula shown on this page, or enter your value in the converter for an instant exact answer.
What is 37 °C in °F?
37 °C = 98.6 °F. Also, 0 °C = 32 °F and 100 °C = 212 °F.
What is the difference between a celsius and a fahrenheit?
Celsius sets water freezing at 0 °C and boiling at 100 °C at sea level. Fahrenheit sets water freezing at 32 °F and boiling at 212 °F; it is used in the US.
Is this tool free and private?
Yes — the Celsius to Fahrenheit is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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