Celsius to Fahrenheit Converter
Convert degrees Celsius to degrees Fahrenheit in one step. Negative temperatures are supported, and the formula and common values are shown below.
Fahrenheit = (Celsius × 9/5) + 32
Celsius to Fahrenheit Formula
To convert Celsius to Fahrenheit, multiply the Celsius temperature by 9/5 (that is, 1.8) and then add 32. Unlike length or weight, the two scales start from different zero points, so adding 32 is essential. To convert back, subtract 32 and multiply by 5/9.
How to Convert Celsius to Fahrenheit
- Enter the temperature in °C. Decimals such as 36.6 work, and you can type a minus sign for negative values or use the Toggle sign button on a phone.
- The Fahrenheit result appears instantly, or press Convert Now.
- Use Swap Units to convert Fahrenheit to Celsius, Copy Result to copy the answer, or Clear to start again.
By hand: multiply by 1.8, then add 32. For a quick estimate, double the Celsius value and add 30. It is close for everyday temperatures, for example 20 °C gives 70 °F against the exact 68 °F.
The converter rejects values below absolute zero (−273.15 °C), since no temperature can be lower.
Practical Examples
- Body temperature: 37 °C × 9/5 + 32 = 98.6 °F.
- Room temperature: 22 °C = 71.6 °F.
- Hot day: 40 °C = 104 °F.
- Cold winter day (negative): −10 °C = 14 °F, and −30 °C = -22 °F.
- Oven: 180 °C = 356 °F.
Celsius to Fahrenheit – Common Values
Quick reference for frequently used conversions
| Celsius (°C) | Fahrenheit (°F) | Kelvin (K) |
|---|---|---|
| -40 °C | -40 °F | 233.15 K |
| -30 °C | -22 °F | 243.15 K |
| -20 °C | -4 °F | 253.15 K |
| -10 °C | 14 °F | 263.15 K |
| 0 °C | 32 °F | 273.15 K |
| 5 °C | 41 °F | 278.15 K |
| 10 °C | 50 °F | 283.15 K |
| 15 °C | 59 °F | 288.15 K |
| 20 °C | 68 °F | 293.15 K |
| 25 °C | 77 °F | 298.15 K |
| 30 °C | 86 °F | 303.15 K |
| 37 °C | 98.6 °F | 310.15 K |
| 40 °C | 104 °F | 313.15 K |
| 50 °C | 122 °F | 323.15 K |
| 100 °C | 212 °F | 373.15 K |
| 150 °C | 302 °F | 423.15 K |
| 180 °C | 356 °F | 453.15 K |
| 200 °C | 392 °F | 473.15 K |
| 220 °C | 428 °F | 493.15 K |
Where and Why This Conversion Is Used
Most countries use Celsius, while the United States and a few others use Fahrenheit for weather and cooking. Converting between them is part of everyday life when you travel, cook or read international data.
- Weather and travel: forecasts abroad may be in the other scale, and knowing that 30 °C is a hot 86 °F day helps you plan.
- Cooking and baking: recipes and oven dials use °C or °F, and a wrong setting can ruin a dish.
- Health: thermometers differ by region, and a normal body temperature of about 37 °C is 98.6 °F.
- Science and engineering: lab data is usually in °C or K, while some industrial equipment in the US reads in °F.
- HVAC and home: thermostats, freezers and water heaters are labelled in different units depending on the market.
For other everyday conversions see the KG to LBS Converter and the KM to Miles Converter.