What is 1 °F in Celsius?

1 °F = -17.22 °C. In the other direction, 1 °C = 33.8 °F.

What is the Fahrenheit scale?

The Fahrenheit scale sets water’s freezing point at 32 and its boiling point at 212, giving 180 degrees between them. It remains the everyday scale in the United States and a handful of territories.

What is the Celsius scale?

The Celsius scale places 0 at the freezing point of water and 100 at its boiling point at standard pressure. It is the civil temperature scale almost everywhere outside the United States.

Is 350°F the same as 180°C?

Not exactly: 350°F is 176.7°C. Recipes round to 180°C, which makes little difference for most baking.

Unit-To-Unit Temperature conversion

Fahrenheit to Celsius

1 °F = -17.22 °C

Subtract 32 first, then multiply by 5/9 — doing it in the other order is the most common error. The quick approximation of subtracting 30 and halving is within about 2 degrees across normal weather temperatures.

Formula °C = (°F − 32) × 5/9

Fahrenheit (°F) max 24 digits

Celsius (°C) max 24 digits

Type in either field — the other updates on every keystroke. Need other units? Open the full temperature converter.

Fahrenheit to Celsius — quick reference
Fahrenheit	Celsius
-40 °F	-40 °C
-20 °F	-28.89 °C
-10 °F	-23.33 °C
0 °F	-17.78 °C
10 °F	-12.22 °C
20 °F	-6.67 °C
25 °F	-3.89 °C
30 °F	-1.11 °C
37 °F	2.78 °C
50 °F	10 °C
75 °F	23.89 °C
100 °F	37.78 °C
200 °F	93.33 °C

Celsius to Fahrenheit — reverse
Celsius	Fahrenheit
-40 °C	-40 °F
-20 °C	-4 °F
-10 °C	14 °F
0 °C	32 °F
10 °C	50 °F
20 °C	68 °F
25 °C	77 °F
30 °C	86 °F
37 °C	98.6 °F
50 °C	122 °F
75 °C	167 °F
100 °C	212 °F
200 °C	392 °F

Worked examples

Common values
Situation	From	To
Cold winter day	0 °F	-17.78 °C
Water freezes	32 °F	0 °C
Room temperature	72 °F	22.22 °C
Body temperature	98.6 °F	37 °C
Oven setting	350 °F	176.67 °C
Water boils	212 °F	100 °C

Mental-math shortcut

Subtract 30 and halve. For 72°F: 42 halved is 21°C, against an exact 22.2°C.

Where this conversion comes up

US weather, ovens, thermostats and clinical thermometers use Fahrenheit. 98.6°F is 37°C, a 72°F room is 22.2°C, and a 350°F oven is 176.7°C (many ovens set to 175°C). A 0°F winter day is -17.8°C.

Common mistakes

Subtract 32 before multiplying by 5/9, not after. Skipping the subtraction gives answers about 18 degrees too high. For fevers keep one decimal place: 100.4°F is 38°C.

Background

Daniel Gabriel Fahrenheit, a Danzig-born instrument maker, built reliable mercury thermometers in the early 1700s. His scale was later fixed so water freezes at 32 and boils at 212, exactly 180 degrees apart.

Learn more

Frequently asked

What is 1 °F in Celsius?: 1 °F = -17.22 °C. In the other direction, 1 °C = 33.8 °F.
What is the Fahrenheit scale?: The Fahrenheit scale sets water’s freezing point at 32 and its boiling point at 212, giving 180 degrees between them. It remains the everyday scale in the United States and a handful of territories.
What is the Celsius scale?: The Celsius scale places 0 at the freezing point of water and 100 at its boiling point at standard pressure. It is the civil temperature scale almost everywhere outside the United States.
Is 350°F the same as 180°C?: Not exactly: 350°F is 176.7°C. Recipes round to 180°C, which makes little difference for most baking.

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