TempConvert

Fahrenheit to Celsius converter

Type a Fahrenheit value and read Celsius instantly, with the other two scales alongside. The formula is °C = (°F − 32) × 5/9.

  • 32 °F = 0 °C
  • 68 °F = 20 °C
  • 98.6 °F = 37 °C
  • 350 °F = 176.67 °C
°F
°C
K
°R
°C°F−40−20020406080100120−4004080120160200240
Drag the column. Left: Celsius. Right: Fahrenheit.

How to convert Fahrenheit to Celsius

°C = (°F − 32) × 5/9

Undo the two differences between the scales in reverse order: take away the 32-degree offset, then shrink the degrees by 5/9 because a Fahrenheit degree is smaller. Step through it:

°C = (°F − 32) × 5/9

-40°F0°F32°F100°F212°F350 °F from 0 °F

Start with 350 °F on the Fahrenheit scale.

= 176.67 °C

The mental shortcut, and where it breaks

"Subtract 30, then halve" works for weather: 70 °F gives 20 °C (exactly 21.1 °C). At 350 °F it gives 160 °C against the true 176.7 °C, far enough off to underbake a cake. See the oven conversion table for kitchen numbers.

°F to °C table

Fahrenheit (°F)Celsius (°C)
−40 °F−40 °C
−20 °F−28.89 °C
0 °F−17.78 °C
10 °F−12.22 °C
20 °F−6.67 °C
32 °F0 °C
40 °F4.44 °C
50 °F10 °C
60 °F15.56 °C
65 °F18.33 °C
68 °F20 °C
70 °F21.11 °C
72 °F22.22 °C
75 °F23.89 °C
80 °F26.67 °C
90 °F32.22 °C
98.6 °F37 °C
100 °F37.78 °C
104 °F40 °C
150 °F65.56 °C
212 °F100 °C
300 °F148.89 °C
325 °F162.78 °C
350 °F176.67 °C
375 °F190.56 °C
400 °F204.44 °C
425 °F218.33 °C
450 °F232.22 °C
500 °F260 °C

Need more rows? The full temperature conversion chart goes from −50 to 300 °C.

Every Fahrenheit value we have a page for

Questions

How do you convert Fahrenheit to Celsius?

Use °C = (°F − 32) × 5/9. For example, 68 °F is 20 °C.

What is 0 °F in Celsius?

0 °F equals −17.78 °C.

What is 100 °F in Celsius?

100 °F equals 37.78 °C.

Why use Celsius?

Celsius is the everyday scale almost everywhere outside the United States: 0 °C is where water freezes and 100 °C where it boils at sea level.

What temperature is 350 °F in Celsius?

350 °F is 176.7 °C exactly; recipes round it to 180 °C, or 160 °C in a fan oven (gas mark 4).

Is 100 °F a fever?

100 °F is 37.8 °C. The NHS treats 38 °C (100.4 °F) or above as a high temperature, so 100 °F is just under that line. For health advice, contact a doctor or NHS 111.

Is there a quick way to convert F to C in my head?

Subtract 30 and halve it. It is close for weather (within about 1 °C between 40 and 80 °F) but is off by 18 °C or more at oven temperatures.