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.
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 |
Real-world scenarios
Celsius and Fahrenheit in real situations
Packing for a trip from the forecast
A forecast of 28 °C for your arrival day means 82.4 °F — shorts weather. A forecast of 12 °C is 53.6 °F, which calls for a jacket you might have left behind if you had read 12 as a Fahrenheit-style number. Converting the week's high and low before you pack takes a minute and prevents the classic mistake of dressing for the wrong scale entirely.
Reading a fever on a foreign thermometer
Many thermometers sold outside the US read only in Celsius. A reading of 38.5 °C is 101.3 °F, a clear fever, while 37 °C is the normal 98.6 °F. Knowing two anchor points — 37 is normal, 38 is a mild fever, 39.5 °C is 103.1 °F and worth medical advice — lets you act on the number instead of guessing at it.
Setting an oven from a metric recipe
A recipe written for 180 °C converts to 356 °F, and the standard US oven setting is 350 °F, close enough that every cookbook makes the same rounding. Our full oven temperature guide covers Gas Mark and fan-assisted settings for the whole working range.
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.
At what temperature are Celsius and Fahrenheit the same?
The two scales meet at minus 40: −40 °C equals −40 °F exactly. It is the only point where the readings match, and a handy check that a conversion was done correctly.
What is 350 °F in Celsius?
350 °F is 176.7 °C, which recipes round to 180 °C, or Gas Mark 4. See the oven temperature guide for the full chart including fan-assisted ovens.
How can I convert Celsius to Fahrenheit in my head?
Double the Celsius value and add 30. For 20 °C that gives 70, close to the exact 68 °F. The shortcut is fine for weather, but use the exact formula, multiply by 1.8 and add 32, for cooking and anything health related.