Calculator Institute
MenuClose

Fahrenheit to Celsius

Convert degrees Fahrenheit to degrees Celsius with the exact formula, see each step, and look up common temperatures in the charts below.

Convert

Minus signs and decimals work: −12.5

70 °F in Celsius

21.11 °C

21.11 °C = 70 °F = 294.26 K

Fahrenheit70 °F
Subtract 32−32
Difference38
÷ 1.8 (the same as × 5/9)21.11 °C
Kelvin ((°F + 459.67) ÷ 1.8)294.26 K
Quick estimate: subtract 30, then halveclose between about 30 and 70 °F, further off outside20 °C

Fahrenheit to Celsius chart

0 °F to 212 °F in steps of 5 degrees, Celsius to one decimal
FahrenheitCelsius
0 °F−17.8 °C
5 °F−15 °C
10 °F−12.2 °C
15 °F−9.4 °C
20 °F−6.7 °C
25 °F−3.9 °C
30 °F−1.1 °C
35 °F1.7 °C
40 °F4.4 °C
45 °F7.2 °C
50 °F10 °C
55 °F12.8 °C
60 °F15.6 °C
65 °F18.3 °C
70 °F21.1 °C
75 °F23.9 °C
80 °F26.7 °C
85 °F29.4 °C
90 °F32.2 °C
95 °F35 °C
100 °F37.8 °C
105 °F40.6 °C
110 °F43.3 °C
115 °F46.1 °C
120 °F48.9 °C
125 °F51.7 °C
130 °F54.4 °C
135 °F57.2 °C
140 °F60 °C
145 °F62.8 °C
150 °F65.6 °C
155 °F68.3 °C
160 °F71.1 °C
165 °F73.9 °C
170 °F76.7 °C
175 °F79.4 °C
180 °F82.2 °C
185 °F85 °C
190 °F87.8 °C
195 °F90.6 °C
200 °F93.3 °C
205 °F96.1 °C
210 °F98.9 °C
212 °F100 °C

How this is calculated

Subtract 32 from the Fahrenheit temperature, then multiply by 5/9, which is the same as dividing by 1.8: °C = (°F − 32) × 5/9. For 70 °F: 70 − 32 = 38, and 38 ÷ 1.8 = 21.11 °C. The formula is exact (NIST Special Publication 811). Subtract the 32 first: the two scales start at different points, and only the difference from freezing is scaled.

For a quick estimate, subtract 30 and halve. 70 °F gives 20 °C against the exact 21.1 °C, and 50 °F gives 10 °C, which is exact. The estimate stays within about 1 degree between 30 and 70 °F and drifts further outside that range.

Kelvin, the scale of science, starts at absolute zero: K = (°F + 459.67) ÷ 1.8. Absolute zero is −459.67 °F or −273.15 °C, and nothing gets colder.

Body temperature

MedlinePlus gives 98.6 °F (37 °C) as the generally accepted average body temperature and notes that studies find a range from about 97 °F to 99 °F (36.1 °C to 37.2 °C). The CDC defines a fever as a measured temperature of 100.4 °F (38 °C) or higher.

Body temperatures from 96 °F to 105 °F
FahrenheitCelsius
96 °F35.6 °C
96.5 °F35.8 °C
97 °F36.1 °C
97.5 °F36.4 °C
98 °F36.7 °C
98.5 °F36.9 °C
99 °F37.2 °C
99.5 °F37.5 °C
100 °F37.8 °C
100.5 °F38.1 °C
101 °F38.3 °C
101.5 °F38.6 °C
102 °F38.9 °C
102.5 °F39.2 °C
103 °F39.4 °C
103.5 °F39.7 °C
104 °F40 °C
104.5 °F40.3 °C
105 °F40.6 °C

Oven temperatures

A U.S. recipe gives the oven setting in Fahrenheit, so it needs converting for an oven marked in Celsius. The last column rounds to the nearest 5 °C: 350 °F is exactly 176.67 °C, which rounds to 175 °C.

Oven settings from 250 °F to 500 °F
FahrenheitCelsiusNearest 5 °C
250 °F121.1 °C120 °C
275 °F135 °C135 °C
300 °F148.9 °C150 °C
325 °F162.8 °C165 °C
350 °F176.7 °C175 °C
375 °F190.6 °C190 °C
400 °F204.4 °C205 °C
425 °F218.3 °C220 °C
450 °F232.2 °C230 °C
475 °F246.1 °C245 °C
500 °F260 °C260 °C

Temperatures worth knowing

Each value from the source named in the row
WhatFahrenheitCelsius
Absolute zero−459.67 °F−273.15 °C
Celsius and Fahrenheit are equal−40 °F−40 °C
Freezer (FDA)0 °F−17.78 °C
Water freezes (sea level)32 °F0 °C
Refrigerator, at or below (FDA)40 °F4.44 °C
Normal body temperature, average (MedlinePlus)98.6 °F37 °C
Fever, at or above (CDC)100.4 °F38 °C
Steaks, roasts, chops, fish: safe minimum (FoodSafety.gov)145 °F62.78 °C
Ground beef and pork: safe minimum (FoodSafety.gov)160 °F71.11 °C
Chicken, turkey and leftovers: safe minimum (FoodSafety.gov)165 °F73.89 °C
Water boils (sea level)212 °F100 °C

Food-safety charts print rounded Celsius values: FoodSafety.gov lists 165 °F as 74 °C and 145 °F as 63 °C, and the FDA gives 40 °F as 4 °C and 0 °F as −18 °C. Water freezes at 32 °F and boils at 212 °F at normal sea-level air pressure; at higher altitude it boils at a lower temperature.

Sources

Checked against the sources below on .

Questions people ask

How do you convert Fahrenheit to Celsius?

Subtract 32, then divide by 1.8 (or multiply by 5/9). 50 °F − 32 = 18, and 18 ÷ 1.8 = 10 °C.

What is 98.6 °F in Celsius?

37 °C: 98.6 − 32 = 66.6, and 66.6 ÷ 1.8 = 37. It is the generally accepted average body temperature (MedlinePlus).

What is 350 °F in Celsius?

176.67 °C, which rounds to 175 °C on an oven marked in steps of 5 degrees.

Is 100 °F a fever?

100 °F is 37.78 °C. The CDC defines a fever as 100.4 °F (38 °C) or higher, so 100 °F is just below that line.

What is 0 °F in Celsius?

−17.78 °C. It is also the freezer temperature the FDA recommends: 0 °F (−18 °C).

What is 212 °F in Celsius?

100 °C, the temperature at which water boils at sea level.