Productive ToolboxCelsius to Fahrenheit Converter
Convert Celsius to Fahrenheit and back instantly, with the formula, worked steps and a °C to °F chart.
37 °C = 98.6 °F
That is 310.15 K on the Kelvin scale.
°F = °C × 9/5 + 32
°F = 37 × 1.8 + 32
°F = 66.6 + 32 = 98.6
Conversion chart
| Celsius | Fahrenheit |
|---|---|
| -40 °C | -40 °F |
| -35 °C | -31 °F |
| -30 °C | -22 °F |
| -25 °C | -13 °F |
| -20 °C | -4 °F |
| -15 °C | 5 °F |
| -10 °C | 14 °F |
| -5 °C | 23 °F |
| 0 °C | 32 °F |
| 5 °C | 41 °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 |
| 40 °C | 104 °F |
| 45 °C | 113 °F |
| 50 °C | 122 °F |
| 55 °C | 131 °F |
| 60 °C | 140 °F |
| 65 °C | 149 °F |
| 70 °C | 158 °F |
| 75 °C | 167 °F |
| 80 °C | 176 °F |
| 85 °C | 185 °F |
| 90 °C | 194 °F |
| 95 °C | 203 °F |
| 100 °C | 212 °F |
Everyday reference points
Related tools
How to Convert Celsius to Fahrenheit
To convert Celsius to Fahrenheit, multiply by 9/5 (or 1.8) and add 32. To go the other way, Fahrenheit to Celsius, subtract 32 and divide by 1.8.
°F = °C × 9/5 + 32
°C = (°F − 32) × 5/9
Example: 25 °C × 1.8 = 45; 45 + 32 = 77 °F
Example: 68 °F − 32 = 36; 36 ÷ 1.8 = 20 °C
The two scales measure the same thing with different zero points and step sizes. Water freezes at 0 °C (32 °F) and boils at 100 °C (212 °F) at sea level, so 100 Celsius degrees span the same range as 180 Fahrenheit degrees. That ratio, 180/100 = 9/5, is where the 1.8 in the formula comes from, and the 32 is the offset between the two freezing points.
How to Use This Converter
- 1Type a temperature: Enter a value in the Celsius box to get Fahrenheit, or in the Fahrenheit box to get Celsius. The other box updates as you type.
- 2Read the steps: The working below the boxes shows the formula with your number filled in, so you can check or copy the calculation.
- 3Use a quick value or the chart: Tap a common temperature such as 0 °C, 20 °C or 37 °C, or pick a row from the conversion chart.
- 4Copy the result: Copy the conversion, for example "37 °C = 98.6 °F", to paste into a recipe, report or message.
Everyday Temperatures in °C and °F
| Situation | Celsius | Fahrenheit |
|---|---|---|
| Weather: a mild spring day | 15 °C | 59 °F |
| Weather: a hot summer day | 30 °C | 86 °F |
| Home thermostat | 21 °C | 69.8 °F |
| Normal body temperature | 37 °C | 98.6 °F |
| Fever threshold | 38 °C | 100.4 °F |
| Oven for cakes | 180 °C | 356 °F (set 350 °F) |
| Oven for roasting | 200 °C | 392 °F (set 400 °F) |
| Freezer | −18 °C | −0.4 °F (≈ 0 °F) |
* Oven dials and recipes round to the nearest 25 °F or 10 °C, so a recipe's 180 °C and 350 °F are the same setting.
Tips & Common Mistakes
- 💡Multiply before adding. 20 °C is 20 × 1.8 + 32 = 68 °F, not (20 + 32) × 1.8 = 93.6 °F.
- 💡Subtract before dividing going the other way. 98.6 °F is (98.6 − 32) ÷ 1.8 = 37 °C.
- 💡A temperature change converts without the 32: a rise of 10 °C is a rise of 18 °F.
- 💡For a quick weather estimate, double the Celsius value and add 30. Use the exact formula for cooking, medicine and science.
- 💡Kelvin has no degree sign and starts at absolute zero: K = °C + 273.15.
Frequently Asked Questions
What is the formula to convert Celsius to Fahrenheit?
°F = °C × 9/5 + 32. Multiply the Celsius temperature by 1.8, then add 32. For example, 25 °C × 1.8 = 45, and 45 + 32 = 77 °F.
How do I convert Fahrenheit to Celsius?
°C = (°F − 32) × 5/9. Subtract 32, then divide by 1.8. For example, 68 °F − 32 = 36, and 36 ÷ 1.8 = 20 °C.
What is 37 °C in Fahrenheit?
37 °C is 98.6 °F, the traditional value for normal human body temperature: 37 × 1.8 + 32 = 98.6.
What is 0 °C in Fahrenheit?
0 °C is 32 °F, the temperature at which water freezes at sea level.
What is 180 °C in Fahrenheit for an oven?
180 °C is 356 °F. Recipes usually round it to 350 °F, a moderate oven. 200 °C is 392 °F, usually written as 400 °F.
At what temperature are Celsius and Fahrenheit the same?
At −40. −40 °C × 1.8 + 32 = −40 °F, so the two scales meet there.
Is there a quick way to estimate °F from °C in my head?
Double the Celsius value and add 30. It gives 70 °F for 20 °C (exact: 68 °F) and is close for everyday weather, but use the exact formula for cooking, medicine or science.
Which countries use Fahrenheit?
The United States and a few territories and small nations use Fahrenheit for everyday temperatures. Most of the world, including Europe, Canada and Australia, uses Celsius.
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