Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit instantly. Type any °C temperature and get the exact °F result. Includes the formula, common temperature reference points, and cooking examples.
Degrees Fahrenheit (°F)
Need the reverse? Convert degrees Fahrenheit to degrees Celsius →
Common Degrees Celsius to Degrees Fahrenheit Conversions
| degrees Celsius (°C) | degrees Fahrenheit (°F) | Note |
|---|---|---|
| -40 °C | -40 °F | Same in both scales |
| -20 °C | -4 °F | Very cold winter |
| 0 °C | 32 °F | Freezing point of water |
| 20 °C | 68 °F | Room temperature |
| 37 °C | 98.6 °F | Normal body temperature |
| 100 °C | 212 °F | Boiling point of water |
| 180 °C | 356 °F | Baking (UK / AU recipes) |
| 200 °C | 392 °F | Hot oven (°C) |
| 220 °C | 428 °F | Very hot oven (°C) |
The Celsius-to-Fahrenheit Formula
The formula to convert Celsius to Fahrenheit is: °F = °C × 9/5 + 32. First multiply by 9/5 (= 1.8) to scale the degree size, then add 32 to account for Fahrenheit's offset from the water freezing point. Example: 25°C × 1.8 + 32 = 45 + 32 = 77°F. For a quick mental estimate: multiply by 2 and add 30 (works well in the common weather range: 20°C × 2 + 30 = 70°F vs. exact 68°F).
Cooking with Celsius and Fahrenheit Ovens
International recipes — particularly from the UK, Europe, and Australia — specify oven temperatures in Celsius. If your oven shows Fahrenheit, you need to convert. Common cooking temperatures: 160°C = 320°F (low, for custards and slow roasts). 180°C = 356°F (moderate, closest to US standard 350°F). 200°C = 392°F (hot, for roasted vegetables and bread). 220°C = 428°F (very hot, for pizza and high-heat roasting). Fan-assisted (convection) ovens run hotter — reduce the recipe temperature by about 20°C (or 25°F) when using convection mode.
Understanding the Celsius Scale in Weather and Medicine
Celsius uses physically meaningful reference points: 0°C = water freezes; 100°C = water boils (at sea level). This makes it easier to reason about weather: below 0°C means ice; 10°C is cold; 20°C is pleasant; 30°C is hot; 40°C is dangerously hot. In medicine, the scale is equally intuitive: normal body temperature is 37°C; a fever is typically above 38°C; heat stroke is a concern above 40°C. The US's use of Fahrenheit for weather means that Americans reading international weather forecasts often need to convert, while international travelers to the US face the reverse.
Frequently Asked Questions
What is the formula to convert Celsius to Fahrenheit?
°F = °C × 9/5 + 32. Multiply by 1.8 then add 32. Example: 100°C × 1.8 + 32 = 212°F.
What is 37°C in Fahrenheit?
37°C × 9/5 + 32 = 66.6 + 32 = 98.6°F. This is normal human body temperature.
What is 180°C in Fahrenheit for baking?
180°C × 1.8 + 32 = 324 + 32 = 356°F. US recipes typically round this to 350°F, so 180°C is the rough equivalent of the standard US baking temperature of 350°F.
What is a quick way to convert Celsius to Fahrenheit without a calculator?
Multiply by 2 and add 30. This is an approximation (exact formula multiplies by 1.8 and adds 32), but it works well for everyday temperatures. For 25°C: 25 × 2 + 30 = 80°F (exact: 77°F). The approximation overestimates by 2–3°F in the normal weather range.