64°F to Celsius = 17.8°C

Fahrenheit to Celsius conversion table
°F	°C	Reference point
−40	−40	Both scales read the same
−20	−28.89
0	−17.78	Freezer setting
10	−12.22
20	−6.67
32	0	Water freezes
40	4.44	Refrigerator limit
50	10
60	15.56
65	18.33
68	20	Room temperature
70	21.11
72	22.22
75	23.89
80	26.67
85	29.44
90	32.22
95	35
97	36.11
98	36.67
98.6	37	Traditional normal body temp
99	37.22
100	37.78
100.4	38	Fever threshold
101	38.33
102	38.89
103	39.44
104	40	High fever
110	43.33
120	48.89
145	62.78	Whole cuts of beef, pork (USDA)
160	71.11	Ground meat (USDA)
165	73.89	Poultry (USDA)
212	100	Water boils at sea level
250	121.11
300	148.89
325	162.78
350	176.67	Moderate oven
375	190.56
400	204.44
425	218.33
450	232.22
500	260

Fahrenheit to Celsius conversion table

°F

°C

Reference point

−40

Both scales read the same

−20

−28.89

−17.78

Freezer setting

−12.22

−6.67

Water freezes

4.44

Refrigerator limit

15.56

18.33

Room temperature

21.11

22.22

23.89

26.67

29.44

32.22

36.11

36.67

98.6

Traditional normal body temp

37.22

100

37.78

100.4

Fever threshold

101

38.33

102

38.89

103

39.44

104

High fever

110

43.33

120

48.89

145

62.78

Whole cuts of beef, pork (USDA)

160

71.11

Ground meat (USDA)

165

73.89

Poultry (USDA)

212

100

Water boils at sea level

250

121.11

300

148.89

325

162.78

350

176.67

Moderate oven

375

190.56

400

204.44

425

218.33

450

232.22

500

260

64 °F at a glance

Celsius: 17.78 °C
Exact fraction: 17 7/9 °C
Kelvin: 290.93 K
Rankine: 523.67 °R
Rounded: 18 °C
Quick estimate: 17 °C

How to convert 64 °F to Celsius

°C = (°F − 32) × 5/9
(64 − 32) × 5/9 = 32 × 5/9 = 160/9 = 17.78 °C

Subtract 32 first because the two scales put zero in different places, then multiply by 5/9 because a Fahrenheit degree is only 5/9 the size of a Celsius degree. 32 is not a multiple of 9, so the exact answer is the repeating decimal 17 7/9 °C.

Estimate it in your head

Subtract 30 and halve: (64 − 30) ÷ 2 = 17 °C. That is 0.8 degrees low, close enough to decide what to wear.

What 64 °F feels like

At 17.78 °C, most people want long sleeves outdoors, and an unheated house at 64 °F feels chilly. It is pleasant running and hiking weather.

Indoors, 64 °F is below the 68 °F daytime winter setting the US Department of Energy suggests for saving energy, so a home this cool would usually have the heat on.

Temperatures near 64 °F

Fahrenheit	Celsius	Kelvin
59 °F	15 °C	288.15 K
60 °F	15.56 °C	288.71 K
61 °F	16.11 °C	289.26 K
62 °F	16.67 °C	289.82 K
63 °F	17.22 °C	290.37 K
64 °F	17.78 °C	290.93 K
65 °F	18.33 °C	291.48 K
66 °F	18.89 °C	292.04 K
67 °F	19.44 °C	292.59 K
68 °F	20 °C	293.15 K
69 °F	20.56 °C	293.71 K

Going the other way: 18 °C in Fahrenheit is 64.4 °F.

Frequently asked questions

What is 64 °F in Celsius?

64 °F is 17.78 °C: subtract 32 (32) and multiply by 5/9.

Is 64 °F hot or cold?

64 °F is cool: sweater or light-jacket weather.

How do you convert 64 °F to Celsius in your head?

Subtract 30 and divide by 2: (64 − 30) ÷ 2 = 17 °C, compared with the exact 17.78 °C.

What is 64 °F in Kelvin?

64 °F is 290.93 K. Convert to Celsius (17.78 °C) and add 273.15.

Need a different value? Use the Fahrenheit to Celsius converter, or browse the Fahrenheit to Celsius chart.

Sources: Wind chill and heat index use the US National Weather Service formulas. Health and food-safety thresholds are from the CDC, FDA, USDA, CPSC and US Department of Energy.

64 °F to °C

Show the work