0 °C = 32 °F
Roughly freezing point. Multiply 0 by 9/5 to get 0, then add 32. The result is 32 °F.
Fast answers, clean math
Celsius and Fahrenheit converter
Convert either direction on one page. Enter a value, choose the source and destination units, or use Swap units to reverse the calculation.
Unit converter
Celsius and Fahrenheit converter
One pair, both directions
Use the correct unit definition
Temperature scales require an offset as well as a ratio. Convert Celsius to Fahrenheit with °F = (°C × 9/5) + 32. Convert Fahrenheit to Celsius with °C = (°F − 32) × 5/9. Swapping the units changes the formula automatically.
A temperature value and a temperature interval are different. A change of 1 °C equals a change of 1.8 °F, but an absolute reading of 1 °C does not equal 1.8 °F because the scale origins differ. The two scales show the same numerical value at −40, a useful check when testing a conversion.
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Formula
How to convert degree Celsius to degree Fahrenheit (°C → °F)
Celsius and Fahrenheit do not share a zero point, so the conversion uses both a multiplication and an addition rather than a single factor.
Formula: °F = (°C × 9/5) + 32
To reverse it, subtract 32 and multiply by 5/9: °C = (°F − 32) × 5/9.
For example, 20 °C becomes (20 × 9/5) + 32 = 36 + 32 = 68 °F.
| Degree celsius (°C) | Degree 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 |
| 100 °C | 212 °F |
Step by step
Worked degree Celsius to degree Fahrenheit examples
20 °C = 68 °F
Roughly room temperature. Multiply 20 by 9/5 to get 36, then add 32. The result is 68 °F.
37 °C = 98.6 °F
Roughly body temperature. Multiply 37 by 9/5 to get 66.6, then add 32. The result is 98.6 °F.
Formula
How to convert degree Fahrenheit to degree Celsius (°F → °C)
Fahrenheit and Celsius use different zero points, so the conversion subtracts 32 first and then scales by 5/9.
Formula: °C = (°F − 32) × 5/9
To reverse it, multiply by 9/5 and add 32: °F = (°C × 9/5) + 32.
For example, 68 °F becomes (68 − 32) × 5/9 = 36 × 5/9 = 20 °C.
| Degree fahrenheit (°F) | Degree celsius (°C) |
|---|---|
| -40 °F | -40 °C |
| 0 °F | -17.78 °C |
| 32 °F | 0 °C |
| 50 °F | 10 °C |
| 68 °F | 20 °C |
| 72 °F | 22.22 °C |
| 90 °F | 32.22 °C |
| 98.6 °F | 37 °C |
| 100 °F | 37.78 °C |
| 150 °F | 65.56 °C |
| 212 °F | 100 °C |
Step by step
Worked degree Fahrenheit to degree Celsius examples
32 °F = 0 °C
Roughly freezing point. Subtract 32 from 32 to get 0, then multiply by 5/9. The result is 0 °C.
72 °F = 22.22 °C
Roughly room temperature. Subtract 32 from 72 to get 40, then multiply by 5/9. The result is 22.22 °C.
98.6 °F = 37 °C
Roughly body temperature. Subtract 32 from 98.6 to get 66.6, then multiply by 5/9. The result is 37 °C.
Background
What is a degree Celsius?
Celsius is a temperature scale on which water freezes at 0 degrees and boils at 100 degrees at standard atmospheric pressure.
Proposed by Swedish astronomer Anders Celsius in 1742, the scale (originally inverted) became the everyday temperature standard across most of the world.
Everyday scale: 0 °C is freezing, 20 to 22 °C is comfortable room temperature, 37 °C is normal human body temperature, and 100 °C is boiling water.
System: metric (SI-derived).
Background
What is a degree Fahrenheit?
Fahrenheit is a temperature scale on which water freezes at 32 degrees and boils at 212 degrees at standard atmospheric pressure.
Devised by physicist Daniel Gabriel Fahrenheit in 1724, the scale remains the standard for weather and cooking in the United States.
Everyday scale: 32 °F is freezing, 68 to 72 °F is comfortable room temperature, 98.6 °F is normal body temperature, and 212 °F is boiling water.
System: US customary.
Where it helps
When you need to convert degree Celsius to degree Fahrenheit
Weather and travel
Forecasts use Celsius in most countries and Fahrenheit in the United States. Converting helps you pack correctly and know what a forecast really feels like before a trip.
Cooking and baking
Oven temperatures and recipe instructions appear in both scales. Converting accurately prevents undercooking or burning when you follow a recipe written for another country.
Health and home
Body temperature, thermostats, and appliance settings mix the two scales. Converting helps you read a thermometer or set a device that uses the unit you are less familiar with.
Accuracy
Precision and common mistakes
The most common mistake with temperature is forgetting the offset and only scaling the number. Because Celsius and Fahrenheit start from different zero points, you must add or subtract 32 in the right order, not just multiply.
For everyday weather and cooking, whole degrees are fine. For body temperature, keep one decimal place, since half a degree can matter. The calculator above keeps full precision and shows the formula so you can check the steps.
| Use case | Good rounding |
|---|---|
| Weather and everyday use | Whole degrees |
| Cooking and ovens | Nearest 5 degrees |
| Body temperature | 1 decimal place |
| Lab and scientific work | Use the exact formula, then round at the end |
Plain answers
Degree celsius to degree Fahrenheit FAQ
How do you convert Celsius to Fahrenheit?
Multiply the Celsius value by 9/5 (which is 1.8) and then add 32. For example, 25 degrees Celsius becomes 25 times 1.8 plus 32, which is 77 degrees Fahrenheit.
What is 20 degrees Celsius in Fahrenheit?
20 degrees Celsius equals 68 degrees Fahrenheit, a typical comfortable room temperature.
What is normal body temperature in Fahrenheit?
Normal human body temperature of 37 degrees Celsius equals 98.6 degrees Fahrenheit.
Why is there a plus 32 in the formula?
Because the two scales have different zero points. Water freezes at 0 degrees Celsius but 32 degrees Fahrenheit, so the conversion must add 32 after scaling.
Is the Celsius to Fahrenheit conversion exact?
Yes. The relationship between Celsius and Fahrenheit is defined exactly, so the formula gives an exact result for any temperature.