Temperature Converter
Celsius to Fahrenheit
Convert Celsius to Fahrenheit below — useful for weather, cooking and reading a thermometer in the US.
Convert Celsius to Fahrenheit
Celsius
100 °C
Fahrenheit
212 °F
Kelvin
373.15 K
How to convert Celsius to Fahrenheit
Multiply the Celsius temperature by 9/5 (1.8) and add 32: °F = °C × 9/5 + 32.
Example: 20 °C is 20 × 1.8 + 32 = 68 °F. A 37 °C body temperature is 98.6 °F.
Celsius to Fahrenheit table
| Celsius | Fahrenheit |
|---|---|
| −10 °C | 14 °F |
| 0 °C | 32 °F |
| 10 °C | 50 °F |
| 20 °C | 68 °F |
| 30 °C | 86 °F |
| 37 °C | 98.6 °F |
| 40 °C | 104 °F |
| 100 °C | 212 °F |
| 160 °C | 320 °F |
| 180 °C | 356 °F |
| 200 °C | 392 °F |
| 220 °C | 428 °F |
Everyday and oven Celsius temperatures in Fahrenheit.
The double-and-add-30 shortcut, and where it fails
The popular mental shortcut — double the Celsius figure and add 30 — is exact at 10 °C and drifts steadily away from there, by 0.2 degrees for every degree of distance.
At 20 °C it says 70 °F when the answer is 68 °F; at 30 °C it says 90 °F against 86 °F; at 40 °C it is six degrees high. It is fine for deciding what to wear and misleading for anything involving a fever or an oven, where the real formula is worth the extra second.
Body temperature and fever
This is where precision matters most, because clinical thresholds are defined in specific numbers rather than approximations.
| Celsius | Fahrenheit | Usually described as |
|---|---|---|
| 36.1–37.2 °C | 97.0–99.0 °F | Normal range |
| 37.5 °C | 99.5 °F | Slightly raised |
| 38.0 °C | 100.4 °F | The standard fever threshold |
| 39.0 °C | 102.2 °F | High fever |
| 40.0 °C | 104.0 °F | Very high — medical guidance advised |
Oven temperatures and gas marks
Recipes cross between three scales, and ovens are rarely accurate to better than a few degrees, so the conventional rounded equivalents below are what cookbooks use.
| Celsius | Fahrenheit | Gas mark | Typical use |
|---|---|---|---|
| 140 °C | 275 °F | 1 | Slow cooking, meringues |
| 160 °C | 325 °F | 3 | Rich fruit cakes |
| 180 °C | 350 °F | 4 | The default baking temperature |
| 200 °C | 400 °F | 6 | Roasting vegetables, pastry |
| 220 °C | 425 °F | 7 | Bread, hot roasting |
| 240 °C | 475 °F | 9 | Pizza, very hot roasting |
Conventional oven conversions used in recipes.
Why the formula has a +32 in it
The two scales disagree on both their zero point and their step size. Fahrenheit puts water's freezing point at 32 °F rather than 0 °C, which is where the +32 comes from, and divides the gap between freezing and boiling into 180 degrees instead of 100 — the ratio 180/100, or 9/5.
A consequence people enjoy: the two scales meet at −40, where −40 °C and −40 °F are the same temperature. It is the only point where they agree.
Thermostats, forecasts and travel
Reading a forecast in the unfamiliar scale is mostly about learning a handful of anchors rather than calculating each time. If you know that 0 °C is 32 °F, 10 °C is 50 °F, 20 °C is 68 °F and 30 °C is 86 °F, everything else is interpolation — every 5 °C step is 9 °F.
Thermostats need more care than forecasts, because the comfortable band is narrow. A room set to 20 °C is 68 °F, and one degree Celsius of change is nearly two degrees Fahrenheit — so a thermostat nudged by what feels like a small amount in one scale is a larger change than expected in the other.
What each temperature feels like
- −10 °C (14 °F) — hard frost; thick winter clothing.
- 0 °C (32 °F) — freezing point; ice on the roads.
- 10 °C (50 °F) — cool; a jacket day.
- 20 °C (68 °F) — comfortable room temperature.
- 25 °C (77 °F) — warm summer day.
- 30 °C (86 °F) — hot; shade and water matter.
- 35 °C (95 °F) and above — heat that becomes a health risk with humidity.
Frequently asked questions
What is 37 degrees Celsius in Fahrenheit?
37 °C is 98.6 °F — normal human body temperature.
Is 20°C hot or cold?
20 °C (68 °F) is mild, comfortable room temperature — neither hot nor cold for most people.
What is 180°C in Fahrenheit (for baking)?
180 °C is 356 °F (often rounded to 350 °F). 200 °C is 392 °F (≈400 °F) and 220 °C is 428 °F (≈425 °F).
What is 200°C in Fahrenheit?
200 °C equals 200 × 9/5 + 32 = 392 °F.
At what temperature are Celsius and Fahrenheit the same?
At −40 degrees. −40 °C and −40 °F are the same temperature, and it is the only point where the two scales meet.
What counts as a fever in Fahrenheit?
The standard threshold is 38 °C, which is 100.4 °F. Below that is usually described as a raised temperature rather than a fever.
Does the double-and-add-30 trick work?
Only near 10 °C, where it is exact. It runs 2 degrees high at 20 °C and 4 degrees high at 30 °C, so use the real formula whenever accuracy matters.