Celsius to Fahrenheit (°C to °F)
°F = °C × 9 ÷ 5 + 32
| degrees Celsius | degrees Fahrenheit |
|---|---|
| -40 °C | -40 °F |
| -20 °C | -4 °F |
| -10 °C | 14 °F |
| 0 °C | 32 °F |
| 5 °C | 41 °F |
| 10 °C | 50 °F |
| 15 °C | 59 °F |
| 20 °C | 68 °F |
Multiply the Celsius temperature by 9/5 (1.8) and add 32. Water freezes at 0 °C (32 °F) and boils at 100 °C (212 °F) at sea level, so 100 Celsius degrees span 180 Fahrenheit degrees.
Formula
°F = °C × 9 ÷ 5 + 32
Example: 0 degrees Celsius = 32 degrees Fahrenheit.
How to convert degrees Celsius to degrees Fahrenheit in your head
- Double it and add 30: 15 °C → 30 + 30 = 60 °F (exact: 59). Good for weather, poor for ovens.
- Each 5 °C is 9 °F. From 10 °C = 50 °F, 15 °C is 59 °F, 20 °C is 68 °F and 25 °C is 77 °F.
- For metric recipes, multiply by 1.8 and add 32 exactly, then round to the nearest 25 °F oven setting: 190 °C → 374 → 375 °F.
Celsius to Fahrenheit chart
| degrees Celsius | degrees Fahrenheit |
|---|---|
| -40 | -40 |
| -20 | -4 |
| -10 | 14 |
| 0 | 32 |
| 5 | 41 |
| 10 | 50 |
| 15 | 59 |
| 20 | 68 |
| 25 | 77 |
| 30 | 86 |
| 35 | 95 |
| 37 | 98.6 |
| 38 | 100.4 |
| 40 | 104 |
| 100 | 212 |
| 160 | 320 |
| 180 | 356 |
| 200 | 392 |
| 220 | 428 |
Celsius to Fahrenheit for weather, fevers and metric recipes
| What | degrees Celsius | degrees Fahrenheit |
|---|---|---|
| Celsius and Fahrenheit meet | -40 | -40 |
| Freezer (−18 °C) | -18 | -0.4 |
| -10 | 14 | |
| Water freezes (sea level) | 0 | 32 |
| 10 | 50 | |
| 16 | 60.8 | |
| Room temperature (example) | 21 | 69.8 |
| 25 | 77 | |
| 30 | 86 | |
| Typical body temperature | 37 | 98.6 |
| Fever threshold (commonly used) | 38 | 100.4 |
| 40 | 104 | |
| Water boils (sea level) | 100 | 212 |
| 160 | 320 | |
| Moderate oven | 180 | 356 |
| 190 | 374 | |
| Hot oven | 200 | 392 |
| 220 | 428 | |
| 250 | 482 |
Good to know
Quick estimate for weather: double it and add 30. 20 °C × 2 + 30 = 70 °F (exact: 68). Close enough to decide on a jacket, not for a recipe.
Oven settings on metric recipes: 180 °C is 356 °F (use 350 °F), 200 °C is 392 °F (use 400 °F), 220 °C is 428 °F (use 425 °F).
More conversions: our free unit converter covers 100+ units, each with its formula.
Read next: High-temperature °F to °C chart: ovens, pizza ovens, kilns and forges
Common celsius to fahrenheit mistakes
- Adding 32 before multiplying. °C × 9/5 + 32 is not (°C + 32) × 9/5: for 20 °C the first gives 68 °F, the second 93.6 °F.
- Converting a change in temperature with the full formula. A rise of 10 °C is a rise of 18 °F (10 × 1.8); do not add 32 for differences.
- Using double-and-add-30 for baking. At 200 °C it gives 430 °F; the real value is 392 °F, so the oven runs about 40 °F hot.
- Forgetting the fan-oven adjustment. Metric recipes written for fan ovens are usually about 20 °C lower than conventional ones; the conversion itself is exact (SI Brochure; NIST SP 811 §4.2.1.1).
Sources
Frequently asked questions
What is 37 °C in Fahrenheit?
37 °C is 98.6 °F — typical body temperature.
What is 180 °C in Fahrenheit?
180 °C is 356 °F; recipes usually round it to 350 °F.
What is 25 °C in Fahrenheit?
25 °C is 77 °F.
What is 30 °C in Fahrenheit?
30 °C is 86 °F.
What is 40 °C in Fahrenheit?
40 °C is 104 °F.
What is 200 °C in Fahrenheit?
200 °C is 392 °F; recipes usually round it to 400 °F.
What is 38 °C in Fahrenheit?
38 °C is 100.4 °F, the temperature commonly used as the fever threshold.
What is 0 °C in Fahrenheit?
0 °C is 32 °F, the freezing point of water.
What is −18 °C in Fahrenheit?
−18 °C is −0.4 °F, the usual freezer setting (0 °F).
How do you convert a temperature change from °C to °F?
Multiply the change by 1.8 and do not add 32. A change of 5 °C is a change of 9 °F.