1 celsius = 33.8 °F
1 °C = 33.8 °F · type math like (12*4)+6.5
Celsius to Fahrenheit is the conversion for anyone using a recipe, weather forecast or thermostat from a different system. Most of the world reports weather and oven temperatures in Celsius, while the United States, its territories and a few Caribbean countries use Fahrenheit, so travellers and cooks hit this conversion constantly.
Gardeners and pool owners also use this pair. Seed packets from European suppliers give germination temperatures in Celsius, such as 20–25 °C for tomatoes, which is 68–77 °F. Pool heaters set to 28 °C are warming the water to 82.4 °F, a comfortable swimming temperature.
Refrigerators should be at or below 4 °C, which is 39.2 °F.
Hot tubs are typically set to 38 °C, which is 100.4 °F.
Useful anchor points help check any answer: 10 °C is 50 °F, 20 °C is 68 °F, and 30 °C is 86 °F. Each 10 °C step adds 18 °F.
°F = (°C × 9/5) + 32
Reverse: 1 °F = -17.222222 °C.
A recipe says bake at 180 °C. What is that in Fahrenheit?
Answer: 180 °C = 356 °F (use 350 °F on most ovens).
| °C | °F |
|---|---|
| -40 °C | -40 °F |
| -30 °C | -22 °F |
| -20 °C | -4 °F |
| -10 °C | 14 °F |
| 0 °C | 32 °F |
| 1 °C | 33.8 °F |
| 2 °C | 35.6 °F |
| 3 °C | 37.4 °F |
| 4 °C | 39.2 °F |
| 5 °C | 41 °F |
| 6 °C | 42.8 °F |
| 7 °C | 44.6 °F |
| 8 °C | 46.4 °F |
| 9 °C | 48.2 °F |
| 10 °C | 50 °F |
| 11 °C | 51.8 °F |
| 12 °C | 53.6 °F |
| °C | °F |
|---|---|
| 13 °C | 55.4 °F |
| 14 °C | 57.2 °F |
| 15 °C | 59 °F |
| 16 °C | 60.8 °F |
| 17 °C | 62.6 °F |
| 18 °C | 64.4 °F |
| 19 °C | 66.2 °F |
| 20 °C | 68 °F |
| 25 °C | 77 °F |
| 30 °C | 86 °F |
| 40 °C | 104 °F |
| 50 °C | 122 °F |
| 75 °C | 167 °F |
| 100 °C | 212 °F |
| 250 °C | 482 °F |
| 500 °C | 932 °F |
| 1 000 °C | 1 832 °F |
180 °C, the default in many European recipes, is 356 °F, so set a US oven to 350 °F.
30 °C is 86 °F; a heatwave at 40 °C is 104 °F.
−40 °C is exactly −40 °F, the only point where the two scales give the same number.
Multiplying by 1.8 alone gives 20 °C as 36 °F. You must add 32 after multiplying, giving 68 °F.
Order matters. (20 + 32) × 1.8 = 93.6, which is wrong. Multiply first, then add.
A rise of 10 °C is a rise of 18 °F, not 50 °F. Differences use only the 1.8 factor.
A degree Celsius is the same size as one kelvin. The Celsius scale is defined from the Kelvin scale as °C = K − 273.15, so water freezes close to 0 °C and boils close to 100 °C at sea-level pressure.
Origin. Swedish astronomer Anders Celsius proposed a 100-step scale in 1742, but he set boiling at 0 and freezing at 100. Carl Linnaeus and others flipped it soon after his death. It was officially named Celsius in 1948.
Used today. Weather, cooking, medicine and science in almost every country, including the UK, Canada and Australia.
A Fahrenheit degree is 5/9 of a Celsius degree. On this scale water freezes at 32 °F and boils at 212 °F, 180 degrees apart.
Origin. Daniel Gabriel Fahrenheit, a Polish-born German instrument maker, introduced the scale in 1724. He used a brine mixture for 0 and set roughly human body heat near 96.
Used today. Everyday weather, ovens and thermostats in the United States, Puerto Rico, Belize, the Bahamas, the Cayman Islands and Liberia.
Double the Celsius figure and add 30. For 25 °C that gives 80 °F; the exact answer is 77 °F. It is close for weather but drifts at oven temperatures.
32 °F, the freezing point of water.
212 °F, the boiling point of water at sea level.
The US never completed metrication for everyday use. Weather services, ovens and thermostats were built around Fahrenheit and public pressure to switch has been low.
428 °F, typically set as 425 °F for roasting.