Celsius to Fahrenheit Converter (°C to °F)
Type a temperature in either box to convert °C to °F or °F to °C. See the sum with your numbers and what the temperature means: body, weather or oven.
Auto shows up to 4 decimal places. Advanced adds Kelvin, Rankine, more decimals and scientific notation.
Paste a list of numbers, one per line. Each line is converted with the units above.
Common temperatures
Tap one to put it in the converter.
Celsius to Fahrenheit and Fahrenheit to Celsius charts
| Celsius | Fahrenheit |
|---|---|
| −40 °C | −40 °F |
| −30 °C | −22 °F |
| −20 °C | −4 °F |
| −18 °C | −0.4 °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 |
| 21 °C | 69.8 °F |
| 22 °C | 71.6 °F |
| 25 °C | 77 °F |
| 30 °C | 86 °F |
| 35 °C | 95 °F |
| 36 °C | 96.8 °F |
| 36.5 °C | 97.7 °F |
| 37 °C | 98.6 °F |
| 37.5 °C | 99.5 °F |
| 38 °C | 100.4 °F |
| 39 °C | 102.2 °F |
| 40 °C | 104 °F |
| 45 °C | 113 °F |
| 50 °C | 122 °F |
| 60 °C | 140 °F |
| 70 °C | 158 °F |
| 80 °C | 176 °F |
| 90 °C | 194 °F |
| 100 °C | 212 °F |
| 150 °C | 302 °F |
| 180 °C | 356 °F |
| 200 °C | 392 °F |
| 220 °C | 428 °F |
| 250 °C | 482 °F |
| Fahrenheit | Celsius |
|---|---|
| −40 °F | −40.0 °C |
| −10 °F | −23.3 °C |
| 0 °F | −17.8 °C |
| 10 °F | −12.2 °C |
| 20 °F | −6.7 °C |
| 32 °F | 0.0 °C |
| 40 °F | 4.4 °C |
| 50 °F | 10.0 °C |
| 60 °F | 15.6 °C |
| 65 °F | 18.3 °C |
| 68 °F | 20.0 °C |
| 70 °F | 21.1 °C |
| 72 °F | 22.2 °C |
| 75 °F | 23.9 °C |
| 80 °F | 26.7 °C |
| 85 °F | 29.4 °C |
| 90 °F | 32.2 °C |
| 95 °F | 35.0 °C |
| 97 °F | 36.1 °C |
| 98.6 °F | 37.0 °C |
| 99 °F | 37.2 °C |
| 100 °F | 37.8 °C |
| 100.4 °F | 38.0 °C |
| 101 °F | 38.3 °C |
| 102 °F | 38.9 °C |
| 103 °F | 39.4 °C |
| 104 °F | 40.0 °C |
| 110 °F | 43.3 °C |
| 212 °F | 100.0 °C |
| 300 °F | 148.9 °C |
| 325 °F | 162.8 °C |
| 350 °F | 176.7 °C |
| 375 °F | 190.6 °C |
| 400 °F | 204.4 °C |
| 425 °F | 218.3 °C |
| 450 °F | 232.2 °C |
Oven temperatures and gas marks
Oven dials and recipes use these rounded pairs (typical UK and US settings), not exact conversions.
| Gas mark | °C | °F | Heat |
|---|---|---|---|
| ¼ | 110 °C | 225 °F | Very cool |
| ½ | 120 °C | 250 °F | Very cool |
| 1 | 140 °C | 275 °F | Cool |
| 2 | 150 °C | 300 °F | Warm |
| 3 | 170 °C | 325 °F | Moderate |
| 4 | 180 °C | 350 °F | Moderate |
| 5 | 190 °C | 375 °F | Moderately hot |
| 6 | 200 °C | 400 °F | Moderately hot |
| 7 | 220 °C | 425 °F | Hot |
| 8 | 230 °C | 450 °F | Very hot |
| 9 | 240 °C | 475 °F | Very hot |
| 10 | 260 °C | 500 °F | Very hot |
More converters
How your temperature is converted
Your numbers, step by step. °F = °C × 9 ÷ 5 + 32.
- 1
Your temperature
37 °C
- 2
Times 9 ÷ 5
37 × 1.8 = 66.6
- 3
Add 32
66.6 + 32 = 98.6 °F
- 4
Quick check
37 × 2 + 30 ≈ 104 °F
Read more: the formula, a worked example, Kelvin and the quick estimate
The formula
Fahrenheit = Celsius × 9 ÷ 5 + 32
Celsius = (Fahrenheit − 32) × 5 ÷ 9
Kelvin = Celsius + 273.15
Rankine = Fahrenheit + 459.67
9 ÷ 5 is 1.8, so you can also write °F = °C × 1.8 + 32 and °C = (°F − 32) ÷ 1.8. The 32 is there because water freezes at 32 °F but 0 °C. Between freezing and boiling there are 180 Fahrenheit degrees but only 100 Celsius degrees, so each Celsius degree is 1.8 Fahrenheit degrees.
Worked example
Convert 37 °C to Fahrenheit. Multiply by 9 ÷ 5: 37 × 1.8 = 66.6. Add 32: 66.6 + 32 = 98.6 °F.
Going back: 98.6 °F − 32 = 66.6, and 66.6 ÷ 1.8 = 37 °C.
Fahrenheit to Celsius
Do the steps the other way round: take away 32 first, then multiply by 5 ÷ 9. A US recipe at 350 °F is (350 − 32) × 5 ÷ 9 ≈ 176.7 °C, and a 72 °F room is 22.2 °C. Use the swap button (⇄) to turn the converter round.
The quick estimate
Double the Celsius figure and add 30 to get roughly the Fahrenheit figure (or take away 30 and halve for the other way). It is exactly right at 10 °C (50 °F) and gets further out the further you go: 30 °C is 86 °F, not 90 °F, and at 37 °C it gives 104 °F instead of 98.6 °F. Use the exact formula for body and oven temperatures.
Kelvin and Rankine
Scientists use Kelvin, which starts at absolute zero (0 K = −273.15 °C) and has the same size steps as Celsius. Rankine does the same for Fahrenheit: 0 °R = −459.67 °F. Kelvin has no degree sign: water boils at 373.15 K. The converter won't go below absolute zero, because nothing can be colder.
The formulas are exact by definition (SI Brochure: K = °C + 273.15; 1 °F = 5/9 K). Fever guide: NHS, a high temperature is 38 °C or more. Oven gas marks are the usual rounded dial settings. Checked 11 October 2026.
Common questions
How do you convert Celsius to Fahrenheit?
Multiply the Celsius temperature by 9, divide by 5 (the same as multiplying by 1.8), then add 32. So 37 °C is 37 × 1.8 + 32 = 98.6 °F, and 20 °C is 68 °F. For a quick estimate in your head, double the Celsius figure and add 30: 20 °C comes out at about 70 °F.
How do you convert Fahrenheit to Celsius?
Take away 32, then multiply by 5 and divide by 9 (the same as dividing by 1.8). So 350 °F is (350 − 32) ÷ 1.8 ≈ 176.7 °C, which oven dials round to 180 °C. And 72 °F is 22.2 °C. The quick estimate is to take away 30 and halve it.
What is 37 °C in Fahrenheit?
37 °C is exactly 98.6 °F, the figure usually given for normal body temperature. The NHS says a high temperature (a fever) is 38 °C or more, which is 100.4 °F. Body temperature naturally moves up and down a little during the day, so a reading slightly above or below 37 °C can be normal.
At what temperature are Celsius and Fahrenheit the same?
At −40. Minus 40 °C is exactly −40 °F, because −40 × 1.8 + 32 = −40. Above that, the Fahrenheit number is always bigger than the Celsius number; below it, the Fahrenheit number is smaller (more negative). For example, −50 °C is −58 °F, while 0 °C is 32 °F.
What is 180 °C in Fahrenheit and gas mark?
180 °C is 180 × 1.8 + 32 = 356 °F. Recipes and oven dials round it to 350 °F, which is gas mark 4, a moderate oven. 200 °C is 392 °F, usually written as 400 °F or gas mark 6. The oven table on this page lists every gas mark.
What are Kelvin and Rankine?
Both start at absolute zero, the coldest anything can be. Kelvin uses Celsius-sized steps, so K = °C + 273.15 and water freezes at 273.15 K. Rankine uses Fahrenheit-sized steps, so °R = °F + 459.67. Absolute zero is 0 K = 0 °R = −273.15 °C = −459.67 °F. Switch to Advanced to convert them.
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