°C to °F conversion line
The straight line maps any Celsius reading to Fahrenheit. The red dot is your value; the smaller dots mark freezing, room, body and boiling temperatures.
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Temperature
Celsius to Fahrenheit Converter
Convert Celsius (°C) to Fahrenheit (°F) instantly, with the exact formula, a full equivalents readout and a conversion chart. Ideal for US weather, travel, recipes and lab work.
Result
98.6 °F
How to convert Celsius to Fahrenheit
Because 100 Celsius degrees cover the same span as 180 Fahrenheit degrees, you first stretch the Celsius value by 9/5, then add Fahrenheit's 32-degree offset so both scales agree at the freezing point of water.
°F = (°C × 9/5) + 32
°F = (°C × 1.8) + 32
°F = (°C × 1.8) + 32
Worked example
A European recipe calls for a 200°C oven. Multiply by 1.8 to get 360, then add 32: 360 + 32 = 392°F, so set a US oven to about 390–400°F.
Quick mental estimate
Double the Celsius value and add 30: (°C × 2) + 30. A 25°C afternoon is about (25 × 2) + 30 = 80°F, close to the exact 77°F.
Celsius to Fahrenheit reference table
| Celsius | Fahrenheit | Where you see it |
|---|---|---|
| −18°C | −0.4°F | Home freezer |
| 0°C | 32°F | Water freezes |
| 20°C | 68°F | Room temperature |
| 37°C | 98.6°F | Body temperature |
| 40°C | 104°F | High fever / heat wave |
| 100°C | 212°F | Water boils |
| 180°C | 356°F | Baking oven |
Quick mental conversion and reference temperatures
For weather you can estimate in your head: double the Celsius value and add 30. That gives 70 °F for 20 °C (exact: 68 °F) and stays within about 2 °F between 0 and 20 °C, drifting further off above that. Use the exact formula for cooking and fever readings.
| Reference point | Celsius → Fahrenheit |
|---|---|
| Absolute zero | -273.15 °C = -459.67 °F |
| Water freezes | 0 °C = 32 °F |
| Room temperature | 20 °C = 68 °F |
| Normal body temperature | 37 °C = 98.6 °F |
| Water boils (sea level) | 100 °C = 212 °F |
| Oven, moderate | 180 °C = 356 °F |
Frequently asked questions
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 (1.8), then add 32. For example, 20°C: 20 × 1.8 + 32 = 68°F.
What is 37°C in Fahrenheit?
37°C equals 98.6°F, the classic normal body temperature.
Is there a quick way to estimate °C to °F?
Double the Celsius value and add 30. For 20°C, 20 × 2 + 30 = 70°F, close to the exact 68°F.
What is 180°C in Fahrenheit for baking?
180°C equals 356°F, usually rounded to a 350°F oven setting.
What is 40°C in Fahrenheit?
40°C equals 104°F, which signals a high fever or a very hot day.
At what temperature do the two scales read the same?
At −40°: −40°C equals −40°F. It is the single crossover point of the two scales.
What is 180 °C in Fahrenheit?
356 °F (180 × 9/5 + 32), usually written as 350 °F in US recipes.
Is there a quick way to convert °C to °F?
Double it and add 30 for a rough answer. For accuracy, multiply by 1.8 and add 32.
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