How to convert Fahrenheit to Celsius
- 1 Type a value in the degrees Fahrenheit box; the degrees Celsius appear as you type.
- 2 Or type in the degrees Celsius box to convert the other way.
- 3 Use the conversion table below for common values, or copy the result.
US oven temperatures
US recipes use a few standard oven settings: 325 °F is 163 °C, 350 °F is 177 °C, 375 °F is 191 °C, 400 °F is 204 °C and 425 °F is 218 °C. Most metric ovens are marked in steps of 10 °C, so round to the nearest mark, and lower it by about 20 °C for a fan oven.
Convert recipe weights with Ounces to Grams. To go from °C to °F, use Celsius to Fahrenheit.
- Round oven temperatures to the nearest 10 °C mark on a metric dial.
- For sugar and frying, use a probe thermometer, as a few degrees make a difference.
- A change of 9 °F equals a change of 5 °C, which helps with quick mental sums.
Features
Exact formula
Subtract 32, then multiply by 5/9.
Oven settings
325, 350, 375, 400 and 425 °F in the chart.
Two-way
Type °C to get °F.
When to use it
US recipes
350 °F is 176.7 °C, usually set as 180 °C, or 160 °C in a fan oven. Converting cups and ounces too? Use Ounces to Grams.
Fever readings
100.4 °F is 38 °C and 102 °F is 38.9 °C. Converting the other way? Use Celsius to Fahrenheit.
Thermostats
A room at 72 °F is 22.2 °C; 68 °F is 20 °C.
Pool and bath water
Pool heaters and hot tubs in the US are set in Fahrenheit; 80 °F is 26.7 °C and 104 °F, a common hot tub limit, is 40 °C.
Related Unit tasks
Frequently asked questions
How do I convert Fahrenheit to Celsius?
Subtract 32, multiply by 5 and divide by 9. 77 °F − 32 = 45, × 5/9 = 25 °C.
What is 98.6 °F in Celsius?
98.6 °F is 37 °C.
What is 350 °F in Celsius?
350 °F is 176.7 °C; most ovens are set to 180 °C.
Is there a quick way to estimate?
Subtract 30 and halve it. 80 °F gives 25 °C; the exact answer is 26.7 °C.
What is 32 °F in Celsius?
32 °F is 0 °C, the freezing point of water.
What fever temperature in °F needs a doctor?
Many guidelines treat 100.4 °F (38 °C) or above as a fever; seek medical advice for very high or long-lasting fevers, especially in babies.
Who uses Fahrenheit?
Mainly the United States and a few small countries; almost everywhere else uses Celsius.
What is 100 °F in Celsius?
100 °F is 37.8 °C.
What is 0 °F in Celsius?
0 °F is −17.8 °C, the temperature of a typical freezer.
What is 425 °F in Celsius?
425 °F is 218.3 °C; most metric recipes use 220 °C, or 200 °C in a fan oven.
Why is the formula not a simple multiplication?
The two scales start at different points: water freezes at zero Celsius but thirty-two Fahrenheit. You must remove that offset before scaling, which is why you subtract first and then multiply.
How do I convert oven settings with a fan?
Convert the temperature first, then reduce it by about twenty degrees Celsius for a fan oven, because moving air cooks food faster at the same setting.
Does my thermometer need converting?
Many digital thermometers can switch between the two scales with a button. Check the small letter on the display, either C or F, before you read the number.
Which unit do thermostats in hotels use?
Hotels in the United States use Fahrenheit, while most others use Celsius. If a room thermostat shows a number like seventy, it is set in Fahrenheit and equals about twenty-one degrees Celsius.
Built and reviewed by Hamza Farooq, founder and lead developer
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